ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 



C41 



77. 

 78. 



79. 



80. 



81. 

 82. 



83. 

 84. 



85. 



86. 

 87. 



88. 

 89. 

 90. 



91. 



Psephis Lordi, Baird, P. Z. S. 1863. Teeth nonnal : pure white. 20-40 fni. c. Cp. 



Psephis salmonea, n. s. Veiy small, rounded, teeth elongate : salmon-coloured. 

 30-40 fm. r. Cp. 



Psephis iellimyalis, n. s. Shape of Tellitnya : central tooth minute ; outside 

 teeth long. 



Veniis Kennerleyi, Rve. Large, transverse, flattened, ashy : strong cone. ribs. 

 Young like astartea, Midd. (not fliictuata, Gkl.). 



Chione succincta, Val. = Calif or niensis, Brod. = NuttaJU, Conr. Cone, rihs smooth. 



Chione excavata, Cpr. P, Z. S. 1856, p. 216. Scarcely differs from cancellata. 

 Possibly exotic. 



Chione simillima, Sby. Finely sculptured each way. 



Chione flKctifraya, Shy. -\-callosa, Sby. Like Stutchburyi : swollen, irregular. 



Tapc^ tenerrima, Cpr. P. Z. S. 1856, p. 200, (jun.)= V. riyida, Gld. pars, f. 538. 

 Very large, thin, fiat ; long pointed sinus. 



Tapes laciniata, n. s. Large, swollen, brittle, ashen ; sculpture pectinated. 



Tapes staminea, Conr. Strong, shape of decussata ; sculpture close ; yellowish. 

 Var. diversa, Shy. =mu)idnlus, live. More swollen, clouded Avith chocolate. 

 Var. Petitii, Desh. =:riyida, Gld. pars. Dead white, sculpture stronger faint, 

 open or close. 2 ft. deep in mud, between tides, Lo?-d. Var. titmida, Sby. 

 "\^ery swollen. Var. orbella, rounded, globose. Var. ruderata, Desh. Con- 

 centric sculpture laminated. 



Saxidomus aratus, Gld. Otia. Very large, oval, with regular concentric ridges. 



Saxidomus Nidtallii, Cour. auct. Transverse, subquadrate, irregularly grooved. 



Saxidomus squalidus, Desh. Large, variable outline, broader, scarcely sculp- 

 tured. 



Saxidomus hremsiphmiatus, n. s. Smaller, Cf///(s^«-shaped ; close, faint concen- 

 tric lines over distant waves ; mantle-bend very small. 

 Family Petricolidce. 



Rupellaria lameTlifera, Conr. z=Cordieri, Desh. With large concentric laminco. 

 No radiations. 



Petricola carditoides, Conr. -\- Californica, Conr. -^cylindracea, Desh. -\-arcunf a, 

 Desh. -^yibba, Midd. Of various aspects, like 6Vmcai'a. Normally shaped 

 like Cypricardia, with fine sculpture like Naranio. 



Family Chamidce. 



CJiama exogyra, Conr. Reversed ; texture opaque ; rudely frilled. 

 Chama pellucida, Shy. Dextral, texture porcellauoiis, rosy; closelv frilled. S.A. 

 1803. 127 



