These snails cling solidly with their broad muscular foot to rocky surfaces at sublittoral depths, although some species such as Haliotis cracherodii used to be common in the intertidal zone.

The black abalone, Haliotis cracherodii

* Haliotis cracherodii Leach, 1814 – the black abalone

** Haliotis cracherodii californiensis

** Haliotis cracherodii cracherodii

The black abalone, Haliotis cracherodii, is a species of large edible sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.

* Haliotis cracherodii californiensis Swainson, 1822 ( synonyms: Haliotis bonita Orcutt, 1900 ; Haliotis californiensis Swainson, 1822 )

* Haliotis cracherodii cracherodii Leach, 1814 ( synonyms: Haliotis expansa Talmadge, 1957 ; Haliotis holzneri Hemphil, 1907 ; Haliotis imperforata Dall, 1919 ; Haliotis lusus Finlay, 1927 ; Haliotis rosea Orcutt, 1900 ; Haliotis splendidula Williamson, 1893 )

File: Haliotis asinina. jpg | The shell of the marine gastropod Haliotis asinina has less than two whorls

The subspecies Haliotis cracherodii californiensis is found around Guadalupe Island, off Baja California ( Mexico ).

A series of " The Ashes " comprises five Test matches, two innings per match, under the regular rules for Test match cricket.

This comprises two sets over nine ends, an end being the completion of both players delivering all their bowls.

Balmoral Castle is built from granite quarried at Invergelder on the estate, and comprises two main blocks, each arranged around a courtyard.

As first discovered by James D. Watson and Francis Crick, the structure of DNA of all species comprises two helical chains each coiled round the same axis, and each with a pitch of 34 ångströms ( 3. 4 nanometres ) and a radius of 10 ångströms ( 1. 0 nanometres ).

The European Pro Electron coding system for active components was introduced in 1966 and comprises two letters followed by the part code.

The Thayer School presently comprises two buildings ; Tuck has seven academic and administrative buildings, as well as several common areas.

It comprises two main divisions: the first is the Liturgy of the Catechumens which consists of introductory litanies, antiphons and scripture readings, culminating in a reading from one of the Gospels and, often, a homily ; the second is the Liturgy of the Faithful in which the Eucharist is offered, consecrated, and received as Holy Communion.

The doctrinal part comprises the first two chapters.

A part of the Alexandrian compendium of Galen ’ s work, this 10th century manuscript comprises two parts that include details regarding various types of fevers ( Humyat ) and different inflammatory conditions of the body.

Located as the southernmost of the Leeward Islands in the eastern Caribbean Sea, Guadeloupe comprises two main islands: Basse-Terre Island, Grande-Terre ( separated from Basse-Terre by a narrow sea channel called Salt River ) forming Guadeloupe proper.

Thus, the word " haibun ", though counted as two syllables in English, is counted as four on in Japanese ( ha-i-bu-n ); and the word " on " itself, which English-speakers would view as a single syllable, comprises two on: the short vowel o and the moraic nasal

It comprises five main islands: Sumatra, Java, Borneo ( known as " Kalimantan " in Indonesia ), Sulawesi, and New Guinea ; two major archipelagos ( Nusa Tenggara and the Maluku Islands ); and sixty smaller archipelagoes.

The Science Requirement, generally completed during freshman year as prerequisites for classes in science and engineering majors, comprises two semesters of physics, two semesters of calculus, one semester of chemistry, and one semester of biology.

Namibia's Defence Force comprises two of the former enemies in a 23-year bush war: the Peoples Liberation Army of Namibia ( PLAN ) and South West African Territorial Force ( SWATF ).

An RPG comprises two main parts: the launcher and a rocket equipped with a warhead.

' Al-Hasa, the largest oasis in the country, actually comprises two neighbouring oases, including the town of Al-Hofuf.

A turbopump is a propellant pump that comprises basically two main components: a rotodynamic pump and a driving gas turbine, usually both mounted on the same shaft, or sometimes geared together.

The World Bank differs from the World Bank Group, in that the World Bank comprises only two institutions: the International Bank for Reconstruction and Development ( IBRD ) and the International Development Association ( IDA ), whereas the latter incorporates these two in addition to three more: International Finance Corporation ( IFC ), Multilateral Investment Guarantee Agency ( MIGA ), and International Centre for Settlement of Investment Disputes ( ICSID ).

Molecular electronics comprises two related but separate subdisciplines: molecular materials for electronics utilizes the properties of the molecules to affect the bulk properties of a material, while molecular scale electronics focuses on single-molecule applications.

It comprises eighteen tracks, including ten Top 40 singles, a couple of Number Ones and two exclusive new tracks – " Champion Sound " and " That Old Pair of Jeans ".

The pericardium comprises two parts: the fibrous pericardium, made of dense fibrous connective tissue, and a double membrane structure ( parietal and visceral pericardium ) containing a serous fluid to reduce friction during heart contractions.

The municipality of Gruyères also comprises the two villages of Épagny ( above sea level ) to the north and Pringy ( above sea level ) to the west of the town hill.

The lovebird genus comprises nine species of which five are monotypic and four are divided into subspecies.

It comprises two subspecies:

The species comprises two distinct subspecies that may merit specific status.

The genus comprises 12 species and several subspecies.

Because of the vast geographic area it occupies, which comprises many different ecological zones, numerous subspecies have been described.

It comprises five subspecies native to the Nearctic and Palearctic ecozones.

It comprises three distinct subspecies groups, all of which may be separate species.

D. galeata comprises two subspecies: D. g. galeata, found in the Old World, and D. g. mendotae, named after Lake Mendota near Madison, Wisconsin, in the New World.

D. undecimpunctata comprises three subspecies — Diabrotica undecimpunctata howardi ( Southern corn rootworm or spotted cucumber beetle ), Diabrotica undecimpunctata tenella ( Western cucumber beetle ) and Diabrotica undecimpunctata undecimpunctata ( Western spotted cucumber beetle ).