ON MOLLUSCA OP 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 Calif ornian branch of the fauna, are as follows : 



No. 



1. Defrancia intricata. S. Diego, on Phasianella compta, &c. Maz. Cat., no. 13. 



2. Terebratula unguiculus. Monterey to S. Diego : young shells in 6-20 fin. : 



not rare. 



3. Terebratella ?caurina. Catalina Is., 80 fin. ; living; rare. 



4. Waldheimia Grayi. Catalina Is., 120 fin. 



5. Zirphcea crispata. Fragments from S. Diego appear (very unexpectedly) to 



belong to this northern species. 



6. Corbula luteola, n.s. S. Pedro S. Diego ; common near shore. 



7. Necera pectinata. Santa Barb., Cat. Is., 40-60 fm. (Puget Sd., Kennerley). 



8. Kennerlia bicarinata, n.s. Cat. Is., 40-60 fm. ; rare^ 



9. Entodesma inflata, Conr., = diaphana, Cpr. Near S. Diego ; 1 valve (Palmer), 



10. Plectodon scaber, n.g. and n.s. Cat. Is. j 2 similar valves, 40-60 fm. 



11. Macoma inquinata. S. Francisco j rare. 



12. Macoma yoldiformis. S. Diego. (Puget Sound, Kennerley.) 



13. Macoma indentata, n.s. S. Diego. 



14. Angidus variegatus, n.s. Mont., Cat. Is., 20-60 fin. ; rare. (Neeah Bay, Swan.) 



15. Arcopagia lamellata. S. Diego. =Maz. Cat., no. 58. 



16. (Edalia ( Cooperella) scintilla formis, n. subg., n.s. S. Diego. Santa Barbara Is. 



17. Semele rupium. Catalina Is. ; not rare. (Also Galapagos.) 



18. Semele pulchra. S. Diego. (Also Cape St. Lucas, Acapulco.) 



19. Semele incongrua, n.s. Catalina Is., 40-60 fin. ; common. 



20. Psepnis salmonea, n.s. S. Diego, Cat. Is., 30-40 fin. j rare. 



21. Psephis Lordi. Cat. Is., 20-40 fm. ; common. (Puget Sound, Kennerley.) 



22. ?Astarte ftuctuata, n.s. Cat. Is. j 2 similar valves ; 40 fin. (Very like the Crag 



fossil, A. omaria, jun. ; but Dr. Cooper considers it a Crassatella.) 



23. Venericardia borealis. Cat. Is., 120 fm. The typical, flat New England form. 



The small swollen var.,= V. ventricosa, Gld!, is also found at Cat. Is., in 

 30-40 fm. 



24. Miodon prolongatus. (Neeah Bay, Swan.) Identified from tracing- only. 



25. Trapezium. One extremely young sp.= Maz. Cat., no. 120 (not like T. Du- 



perryi). S. Diego. 



26. Chama ?spinosa. S. Diego. (One young valve sent.) 



27. Cardium (?modestum, var.) centifilosum. Cat. Is., 30-40 fm. [The differences 



between this and the Eastern Pacific shell are probably only varietal.] 



28. Hemicardium Uangidatum. Cat. Is., living in 10-20 fm. (Also Acapulco, 



Panama.) 



29. Liocardium elatum. S. Diego ; very large (Maz. Cat., no. 124). 



30. Lucina tenuisculpta. S. Diego, living in 4fm. (Also Puget Sound, Kennerley.) 



Var., dead in 120 fm., Cat. Is. (approaching L. Mazatlanica, Maz. Cat., 

 no. 144). 



31. Lucina borealis. Cat. Island, 120 fin. " =Z. acutelirata, Conr., foss. E. E." 



[Exactly agrees with British examples.] 



32. Cryptodonflexuosus. Cat. Is., 120 fm. Ditto. 



33. Kellia suborbicidaris. S. Diego ; Cat. Is., 30-40 fm. Ditto. 



34. Kellia (var.) Cliironii. S. Diego. (Also Neeah Bay, Swan.) 



35. Lasea rubra. Cat. Is., shore (typical). 



36. Leptoh meroeum, n.s. S. Diego. 



37. Tellimya tumida. S. Diego. (Also Puget Sound, Kennerley.) 



38. Pristes oblongus, n.g., n.s. S. Diego. 



39. Crenella decusmta. Cat. Is., 10-40 fm. j not rare. (The ordinary British, not 



the New England form.) 



40. Barbatia gradata. S. Diego ; Maz. Cat., no. 104. 



41. Axinaia intermedia. Monterey S. Diego, Cat. Is., 40-60 fm. [Scarcely differs 



from the South American shell. It is the A. Barbarensis, Conr., of Pac. R. 

 R. fossils, teste Cooper."} 

 7 97 



