ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 611 
compiled from Dr. Cooper’s letters received at different times, without oppor- 
tunity for his revision. Should errors, however, have escaped detection, they 
will, no doubt, be corrected, and omissions supplied, in the forthcoming Re- 
ports of the Survey. The species either new to science, or now first found in 
the Californian branch of the fauna, are as follows :— 
ce ia 
eS 
- Defrancia intricata. §. Diego, on Phasianella compta, &e. Maz. Cat., no. 13. 
. Lerebratula unguiculus. Monterey to 8. Diego: young shells in 6-20 fm.; 
not rare. 
. Lerebratella ?caurina. Catalina Is., 80 fm. ; living; rare. 
. Waldheimia Grayi. Catalina Is., 120 fm. 
. Zirphea crispata, Fragments from 8. Diego appear (very unexpectedly) to 
belong to this northern species. 
» Corbula liteola,n.s. 8. Pedro—S. Diego; common near shore. 
. Neera pectinata. Santa Barb., Cat. Is., 40-60 fm. (Puget Sd., Kennerley). 
. Kennerlia bicarinata, n.s. Cat. Is., 40-60 fm. ; rare. 
. Entodesma inflata, Cony.,=diaphana, Cpr. Near 8. Diego; 1 valve (Palmer). 
. Plectodon scaber, n.g. and n.s. Cat. Is. ; 2 similar valves, 40-60 fm. 
. Macoma inquinata. - 3. Francisco ; rare. 
- Macoma yoldiformis. 8. Diego. (Puget Sound, Kennerley.) 
. Macoma indentata, u.s. 8. Diego. 
» Angulus variegatus, n.s. Mont., Cat. Is., 20-60 fm. ; rare. (Neeah Bay, Swan.) 
. Arcopagia lamellata. S. Diego. =Maz. Cat., no. 58. 
. Gidalia ( Cooperella) scintilleformis, n. subg., n.s. 8. Diego. Santa Barbara Is. 
. Semele rupium. Catalina Is.; not rare. (Also Galapagos.) 
. Semele pulchra, 8. Diego. (Also Cape St. Lucas, Acapulco.) 
. Semele ncongrua, n.s. Catalina Is., 40-60 fm. ; common. 
. Psephis salmonea, u.s. 8. Diego, Cat. Is., 30-40 fm. ; rare. 
. Psephis Lordi. Cat. Is., 20-40 fm.; common. (Puget Sound, Kennerley.) 
» PAstarte fluctuata,n.s. Cat. Is, ; 2 similar valves ; 40 fm. (Very like the Crag 
fossil, A. omaria, jun.; but Dr. Cooper considers it a Crassatella.) 
. Penericardia boreahs. Cat. Is.,120fm. The typical, flat New England form. 
The small swollen var.,= V. ventricosa, Gld., is also found at Cat. Is., in 
30-40 fm. 
. Miodon prolongatus. (Neeah Bay, Swan.) Identified from tracing only. 
. Trapezium. One extremely young sp.=Maz. Cat., no. 120 (not like 7. Du- 
perryt). §. Diego. 
» Chama ?spinosa, 8. Diego. (One young valve sent.) 
. Cardium (?modestum, vax.) centifilosum. Cat. Is., 30-40 fm. [The differences 
between this and the Eastern Pacific shell are probably only varietal. | 
- Hemicardium biangulatum. Cat. Is., living in 10-20 fm. ‘(Also Acapulco, 
Panama.) 
. Liocardium elatum. 8. Diego ; very large (Maz. Cat., no. 124), 
. Lucina tenuiseulpta. 8. Diego, living indfm. (Also Puget Sound, Kennerley.) 
Var., dead in 120 fm., Cat. Is. (approaching LZ. Mazatlanica, Maz. Cat., 
no. 144), 
- Lucina borealis. Cat. Island, 120 fm. “ = Z. acutelirata, Conr., foss. E. E.” 
[Exactly agrees with British sae a 
itto. 
. Cryptodon flecuosus. Cat. Is., 120 fm. 
. Kellia suborbicularis. 8. Diego ; Cat. Is., 30-40 fm. Ditto. 
. Kellia (var.) Chironti. 8S. Diego. (Also Neeah Bay, Swan.) 
- Lasea rubra. Cat. Is., shore (typical). 
. Lepton meroéum, u.s. 8. Diego. 
. Tellimya tumida. 8. Diego. (Also Puget Sound, Kennerley.) 
. Pristes oblongus, n.g., n.s._ 8. Diego. 
Crenella decussata. Cat. Is., 10-40 fm. ; not rare. (The ordinary British, not 
the New England form.) 
_ 40. Barbatia gradata. 8, Diego; Maz. Cat., no. 194. 
_ 41. Axinea intermedia. Monterey—S, Diego, Cat. Is.,40-60fm. [Scarcely differs 
from the South American shell. It is the A. Barbarensis, Conr., of Pac. R. 
R. fossils, teste Cooper. ] 
2R2 
