~er 
-~ 
92, 
93. 
ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 641 
Nutt.| Jew. | B. A. |Smiths. Ins.| Ken, | Lord.|Swan.| Cooper. | 
77. Psephis Lordi .......... Say ceil ie) tee oa ad ea I 
78. salmonea .......... — as —}—]— DI 
79. tellimyalis ........ Sere aed cereal -- 
80. Venus Kennerleyi........ —;—|;—|]| — P|}—|V — 
81. Chione succincta ........ iBD|}; D;C} — —|—|— D 
82. CRCAV AEA) oie ai siatn ates D}—}]— |} — — |— | — — 
83. semi limiaey nee aa cee DD L —}|—]— D 
84. Auotifrage, 5.6.5. 03" De Dee mv) —|—|— D 
85. Tapes tenerrima ........ —|B{|F) F —|;—|V D 
86 Deir atarn anv ain fates —;—/|M D —}—|— D 
87. RUATINTIOB Goths s ) Pee DC| F ee aD See | FD 
876 var, Petitii.......- —|{/—j|]C ]VPOM;P|V|V VM 
87 ce var, ruderata ...... —}—|}—)]} — —|V — 
88. Saxidomus aratus........ Se F —|—)|}— FD 
89. TS ela 1 ir DID;C} — —|}—)— FD 
90. squalidus .......... —|}F/}0Oj} VPOF|P/|ViV -- 
91. brevisiphonatus ....) — | — | — — —|Vji— — 
92. Rupellaria lamellifera....) D | M | C D —|—|— M 
| 93. Petricola carditoides ....|BD MB} C F P|—|V M 
94, Chama exogyra.......... BD | — | C LH | —/}—|}— D 
95 PEMA Rear as: ees B-| -B—--6 MD | —;—j|—)j| FMD 
77. Psephis Lordi, Baird, P, Z.S, 1863. Teeth normal: pure white. 20-40 fm. ¢. Cp. 
78. Psephis salmonea, n.s, Very small, rounded, teeth elongate: salmon-coloured. 
30-40 fm. r. Cp. 
. Psephis tellimyalis, n.s. Shape of Tellimya: central tooth minute; outside 
teeth long. 
. Venus Kennerleyi, Rve. Large, transverse, flattened, ashy: strong cone. ribs, 
Young like astartea, Midd. (not fluctuata, Gld.). 
. Chione succincta, Val.= Californiensis, Brod. = Nuttall’, Cony. Cone. ribs smooth. 
. Chione excavata, Cpr. P.Z.S. 1856, p. 216, Scarcely differs from cancellata. 
Possibly exotic. 
. Chione simillima, ey. Finely sculptured each way. 
. Chione fluctifraga, Sby. 
+callosa, Shy. Like Stutchburyi: swollen, irregular. 
Tapes tenerrima, Cpr. P. Z. 8, 1856, p. 200, (jun.)= V. rigida, Gld. pars, f. 538. 
Very large, thin, flat; long pointed sinus. 
. Tapes lacimata,n.s. Large, swollen, brittle, ashen; sculpture pectinated. 
Tapes staminea, Cony. Strong, shape of decussata; sculpture close ; yellowish. 
Var. diversa, Shy.=mundulus, Rve. More swollen, clouded with chocolate. 
Var. Petitii, Desh.=rigida, Gld. pars. Dead white, sculpture strong or faint, 
open or close. 2 ft. deep in mud, between tides, Lord. Var. tumida, Sby. 
Very swollen. Var. orbella, rounded, globose. Var. ruderata, Desh. Con- 
centric sculpture laminated. 
» Saxidomus aratus, Qld. Otia. Very large, oval, with regular concentric ridges. 
. Saxidomus Nuttallii, Cony. auct. Transverse, subquadrate, irregularly grooved. 
. Saxidomus squalidus, Desh, Large, variable outline, broader, scarcely sculp- 
tured. 
. Saxidomus brevisiphonatus, n. 8. Smaller, Callista-shaped ; close, faint concen- 
tric lines over distant waves; mantle-bend very small. 
Family Petricolide. 
Rupellaria lamellifera, Conr.=Cordieri, Desh. With large concentric lamine. 
No radiations. 
Petricola carditoides, Conr.+ Californica, Conr.+cylindracea, Desh.+-arcuata, 
Desh.+gibba, Midd. Of various aspects, like Saricava. Normally shaped 
like Cypricardia, with fine sculpture like Naranio, 
Family Chamide. 
94. Chama exogyra, Cony. Reversed; texture opaque; rudely frilled. 
ig i? pellucida, Shy. Dextral, texture porcellanous, rosy ; closely frilled, S.A. 
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