ON MOLLUSCA OK THE WEST COAST OF NORTH AMERICA. 



cn 



I i . 

 78. 

 79. 

 80. 

 81. 

 82. 



.<;3. 



84. 

 85. 

 8(5. 

 87. 

 87 

 87 

 SS. 

 89. 

 90. 

 91. 

 92. 

 9?. 

 94. 

 95. 



Psephis Lordi . . , 



salmonea . . . 



tellimyalis . 



Venus Kennerleyi . 

 Chione succincta . 



excavata . 

 simillima . 

 fluctifrasra . 



Tape."? tenerrima .... 



laciniata 



staminea 



b. var. Petitii .... 



c. var. ruderata . . 



, Saxidonius aratus .... 



Nuttallii 



, squalidus 



, brevi.siphonatu3 



. Riipellaria lamellifera 

 , Petricola carditoides 



Chama exoinTa 



, pellucida 



Nntt. Jew. j B. A, 



BD 

 D 

 D 

 D 



DC 



D 



D 

 BD 

 BD 



B 



D 



D 

 D 

 B 



D 

 F 



M 

 MB 



B 



C 

 C 

 F 

 M 

 F 

 C 



C 

 O 



C 



C 



c 

 c 



77. Psephis Lordi, Baird, P. Z. S. 1863. Teeth nomal : pure white. 20-40 fm. c. Cp. 



78. Psephis sabnmiea, n. s. Very small, rounded, teeth elongate : salmon-coloured, 



30-40 fm. r. Cp. 



79. Psephis tellimyalis, n. 8. Shape of Tellimya : central tooth minute ; outsido 



teeth long. 



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



Young like astartea, Midd. (not Jliictitata, Gld.). 



81. Chione sticcincta,Yal.= Califomiensis,Brod. = XutfaIli,Conr. Cone, ribs smooth. 



82. Chi^me e.rcavata, Cpr. P. Z, S. 1856, p. 216. Scarcely ditibrs from canctlluta. 



Possibly exotic. 



83. Chione simillima, Sbv. Finely sculptured each way. 



84. Chionejliicfifraffa, Shj. -\-callosa. Shy. hike Stutchburyi: swollen, irregular. 



85. Tajief tenerrima, Cpr. P. Z. S. 1856, p. 200, (jun.)= V. rigida, Gld. pars, f. 538. 



Verj' large, thin, flat ; long pointed sinus. 



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



87. Tapes staminea, Conr. Strong, shape of decmsata ; sculpture clo.se ; yellowish. 



Var. diversa. Shy. ^mundidits, live, ilore swollen, clouded with chocolate. 

 Var. Petitii, Desh. =rif/ida, Gld. pars. Dead white, sculpture stronger faint, 

 open or close. 2 ft. deep in mud, between tides, Lord. Var. tumida, Sby. 

 A ery swollen. Var. orbella, rounded, globose. Var. ruderata, Desh. Con- 

 centric sculpture laminated. 



88. Saridotnus aratm, Gld. Otia. Verv large, oval, with regular concentric ridges. 



89. Saxidomus Ntdtallii, Conr. auct. Transverse, subquadrate, iiTegularly grooved. 



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



tured. 



01. Saxidomus hremsiphotiatus, n. 8. Smaller, Cff/fe/rt-shaped ; close, faint concen- 

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



Family Petricolidce. 



92. Rupcllaria lamellifera, Conr.^ Cordieri, Desh. With large concentric laminso. 

 No radiations. 



03. Petricola carditoides, Conr. -f- Ca/j/brwiVa, Conr.+cylindracea, Desh. +arcKnta, 



Desli.-|-/7)'66fl, Midd. Of various aspects, like Sojicava. Normally shaped 

 like Cypricardia, with fine sculpture like Naranio. 



Family Chamidte. 



04. Chama exngyra, Conr. Keversed ; texture opaque ; rudely frilled. 



05. Chama pellucida, Shj. Dexti'al, texture porcellauous, rosy j closelv frilled. S.A, 

 1803. ^127 



