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 Californian branch of the fauna, are as follows : — 



Ho. _ 



1. Defrancia intricata. S. Diego, on Phasianella compta, &c. Maz. Cat., no. V-). 



2. Terehratula mxyuiculus. Monterey to S. Diego : young shells in 6-20 im. : 



not rare. 



3. Terebratella ? cmtrina. Catalina Is., 80 fm. ; living; rare. 



4. WahJheimia Grayi. Catalina Is., 120 fm. 



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



belong to this northern species. 



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



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



8. KcnnerUa bicariiiata, n.s. Cat. Is., 40-60 fm. ; rare. 



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



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



11. Macoma inquinata. S. Francisco ; rare. 



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



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



14. Angulus variegatui, n.s. Mout., Cat. Is., 20-60 fm. ; rare. (Neeah Bay, Sivan.) 



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



16. (Edalia{Cooperella) scintilla'for7yiis,u.s,u)a\^.,\\.fi. S.Diego. Santa Barbara Is. 



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



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



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



20. Psephis salmonea, n.s. S. Diego, Cat. Is., 30-40 fm. ; rare. 



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



22. ?Astarte Jitictuata, n.s. Cat. Is. ; 2 similar valves ; 40 fin. (Very like the Craj 



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, Cld., is also found at Cat. Is., in 

 30-40 fm. 



24. 3Iiodon prnlongatiis. (Neeah Bay, Swan.} Identified from tracinji^ only. 



25. Trapezmm. One extremely young sp.= Maz. Cat., no. 120 (not \Wq T. Du- 



perryi), S. Diego. 



26. Chama fspinosa. S. Diego. (One young valve sent.) 



27. Cardium (fmodestum, varr) centijilos'um. Cat. Is., 30-40 fm. [The differences 



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



28. Hemicardium hiangulatum. Cat. Is., living in 10-20 fin. (Also Acapulco, 



Panama.) 



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



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



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

 no. 144). 



31. Lucina borealis. Cat. Island, 120 fm. " =L. acutelirata, Conr., foss. E. E." 



[Exactly agrees with British examples.] 



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



33. Kdlia suborbicularis. S. Diego ; Cat. Is., 30-40 fm. Ditto. 



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



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



36. Lepton mero'euni^ n.s. S. Diego. 



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



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



39. Crenella dec'us^ata. Cat. Is., 10-40 fm. ; not rare. (The ordinary British, not 



the New England form.) 



40. Barbatia gradata. S. Diego ; Maz. Cat., no. 194. 



41. Arincea intermedin. Monterey — S. Diego, Cat. Is., 40-60 fm. [Scarcely differa 



from the South American shelL It is the A. Barbarensis, Com'., of Pac. 11. 

 K. fossils, teste Cooper.'] 



7 97 



