167 



II. Intertidal Sand Beaches and 



Prosobranchiata 

 Cerithium maciilosum 

 Cerithidea albonodosa 

 Strombus gracilior 

 Oliva spicata 

 Olivella anazora 

 Bulla gouldiana 



Scaphopoda 

 Cadulus austinclarki 



Lamellibranchiata 



Cardita grayi 



Cardita megastropha 



Codakia distinguenda 



Transanella puella 



Pilar lupanaria 



Megapitaria squalida 



Anomalocardia subimbricaia lumens 



Sand-Flats to 10 Meters: 



Living only. 



Tellina felix 

 Macoma pads 

 Heterodonax bimaculalus 



Crustacea 

 Clibanarius digueli 

 Neopanope pelerseni 

 Ocypode occidentalis Stimpson^ 

 Uca crenulala 



Holothuroidea 

 Selenkothuria lubrica 

 Thyone parafusus 

 Neolhyone gibbosa 



Echinoidea 

 Eucidaris Ihouarsi 

 Echinomelra vanbrunli 

 Brissus lalicarinalus 



Prosobranchiata 

 Nerilina luleofasciala 

 Turrilella gonostoma 

 Turrilella leucosloma 

 Cerilhium uncinalum 

 Cypraea arabicula 

 Slrombus granulalus 

 Cassis coarclala 

 Nassarius angulicoslis 

 Nassarius tiarula 



Lamellibranchiata 



Anadara mullicoslata 

 Anadara labiosa 

 Glycymeris delesserlii 

 Alrina mama 

 Cardila grayi 

 Cardila lalicoslala 

 Cardila radiala 

 Diplodonla subquadrala 

 Diplodonta sericala 

 Trachycardium procerum 



Abundant, but not living at time of collection. 



Papyridea aspersa 

 Tivela byronensis 

 Pilar concinna 

 Megapilaria squalida 

 Dosinia dunkeri 

 Dosinia ponderosa 

 Chione californiensis 

 Chione compla 

 Chione picla 



Anomalocardia subimbricaia 

 Prololhaca meladon 

 Prololhaca grala 

 Analina undulata 

 Mulinia pallida 

 Tellina erythronotus 

 Donax assimilis 

 Donax californicus 

 Donax carinatus 

 Donax punctostriatus 

 Tagelus affinus 

 Semele guaymasensis 

 Pholas chiloensis 



IV. Nearshore Shelf, Sand Bottom, 11 to 26 Meters, Northern Gulf: 



Living only. 

 Hexacorallia Prosobranchiata 



Heterocyathus aequicostatus 



Aslrangia corlezi 

 Aslrangia pedersonii 



Calliostoma bonila 

 Niso excolpa 

 Turrilella leucosloma 



1) Seen on beaches, identified in Scripps Institution collections from Gulf of California, 

 but not collected as part of this study. 



