BRACHIOPOD COMMUNITIES 



79 



Pelecypoda 



Amygdalum pallidulum (Dall) — 2 

 Cardiomya pectinata 



(Carpenter) — 4- 

 Clinocardium nuttalli 



(Conrad)— 4 

 Cyrilla minuta (Carpenter) — 7 

 Kellta suh orbicularis 



(Montagu) — 3 

 Lima subauriculata Montagu — 1 

 Nemocardium centifilosum 



(Carpenter) — 16 

 Nuculana hamata (Carpenter) — 1 

 Nuculana tap/lira (Dall) — 7 

 Echinodermata 

 Asteroidea 



Astropecten sp. juvenile — 4- 

 Ophiuroidea 



Amphiacantha amphacantha 



(McClendon)— 11 

 Amphiodia urtica Lyman — 44 

 Holothuroidea 



Parastichopus calif ornicus (Stimpson) 

 Thyone benti Deichmann 

 Hemichordata 



Schizocardium sp. — 2 

 Chordata 

 Urochordata 



undetermined species — 4- 



Pandora bilirata Conrad — 1 

 Parvilucina tenuisculpta 



(Carpenter) — 26 

 Pseudochama exogyra (Conrad) — 1 

 Saxicava arctica (Linne) — 5 

 Solamen columbianum (Dall) — 3 

 Sphenia fragilis Carpenter — 2 

 Tellina carpenteri Dall — 4- 

 Ferticordia ornata (d'Orbigny) — 1 



Ophiopholis bakeri McClendon — 6 

 Ophiothrix spiculata LeConte — 2 



—2 



The above list, even though not a complete one for all of the animals 

 of the Catalina area, gives a picture of the community of which the 

 brachiopods are a part. It shows that in this small bottom area there 

 were at least 115 different lands of animals and nearly 500 individuals 

 living together. This represents a concentration of benthic life not usually 

 appreciated. 



A general but incomplete survey, using the biological dredge, has 

 added considerably to the list of the more conspicuous animals living in 

 the Catalina area. The following series gives those animals thus encount- 

 ered and represents the more obvious additions to the community list. 

 With some groups the relative abundance of some forms has been noted 

 and indicated by the following symbols: AB — abundant; C — common; 

 F — few. 



