170 



V. Intermediate Shelf, Sand Bottom, 27 to 65 Meters, Northern Gulf: 



Living only. 



Hexacorallia 

 Hetcrocyathiis aequ icostatus 



Prosobranchiata 

 Calliostoma nepheloide 

 Solariella triplostephanus 

 Calyptraea mamillaris 

 Crepidulz excavata 

 Crepidiila striolata 

 Crucibulum concameratum 

 Crucibuhim scultelatum 

 Natica grayi 

 Cassis centriquadratum 

 Ficus ventricosus 

 Murex recurvirostris 

 Strombina gibberula 

 Nassarius pagodus 

 Nassarius versicolor 

 Fusinus colpoicus 

 Fusiniis diipetitthouarsi 

 Olivella fletcherae 

 Mitra sulcata 

 Lyria cummingii 

 Knefastia luberculifera 

 Clavus melea 

 Claims pallidas 

 Crassispira ericana 

 Hindsiclava dotella 

 Turricula armilda 

 Pleuroliria albicarinata 



Lamellibranchiata 

 Anadara cepoides 

 Anadara mix 

 Anadara obcsa 

 Liobenis Salvador icus 

 Chlamys circularis 

 Crassatella gibbosa 

 Trigoniocardia biangulata 

 Laevicardium elatum 

 Nemocardium pazianurn 

 Transanella puella 

 Pilar newcombianus 

 Chione mariae 

 Tellina inaequistriata 

 Macoma medioamericana 

 Macoma siliqua 

 Macoma undulata 

 Pandora granulata 

 Plecladon scaber 



Crustacea 

 Balanus concajus mexicanus 

 Balanus trigonus 



Munida lenella 

 Pleuroncodes planipes 

 Porcellana cancrisocialis 

 Dardanus sinistripes 

 Paguristes bakeri 

 Paguristes praedator 

 Pagurus benedict i 

 Pagurus californicus 

 Pagurus gladius 

 Pagurus smithi 

 Pylopagurus varians 

 Hypoconcha loivei 

 Calappa sausserei 

 Hepatus lineatus 

 Randallia americana 

 Randallia ornata 

 Lithadia cummingii 

 Cancer amphioetus 

 Portunus iridescens 

 Portunus minimus 

 Portunus pichilinquei 

 Micropanope polita 

 Mesorhea belli 

 Collodes tenuirostris 

 Euprognatha bifida 

 Paradasygius depressus 

 Podochela hemphilli 

 Pyromaia tuberculata 

 Stenocionops ovata 

 Cymopolia fragilis 

 Cymopolia zonula 

 Clythrocerus laminatus 

 Ethusa lata 



Pseudorhombila xanthiformis 

 Pinnotheres, sp. 



Echinoidea 

 Arbacia incisa 

 Clypeaster europacificus 

 Clypeaster, sp. 

 Lovenia cordiformis 

 Agassizia scrobiculata 

 Brissopsis pacifica 

 Meoma grandis 



Asteroidea* 

 Luidia Columbia Liitken 

 Astropecten californicus Fisher (juv. 



Ophiuroidea 

 Amphigyptis perplexa Niels n 



Added after compl tion of Table I. 



