ON MOLLrSCA OP THK WEST COAST OF XORTH AMERICA. 611 



compilerl from Dr. Cooper's letters received at different times, •without oppor- 

 tunity for his revision. iShould errors, however, have esruped detection, they 

 will, no doubt, be coirected, and omis.sions supplied, in the forthcoming Ke- 

 poits of the Survey. The species either new to science, or now first found in 

 the Californian branch of the fauna, are as follows : — 



>'o. 



1. Drfrancia itUricata. S. Diego, on PhasianeUa cmn/iia, &c. Maz. Cat., no. 13. 



2. Tenbratula unyuiculus. Monterey to IS. Uiego : yoiing shells iu (i-20 I'm. : 



not rare. 



3. Terebrafella ? caurina. Catalina Is., 80 fm. ; living; rare. 



4. Wahnu'imin Grayi. Catalina Is., 120 fm. 



6. Zirph'Hi crLspata. Fragments from S. Diego appear (very unexpectedly) to 

 belong to this northern sipecies. 



6. Corhula luteola, n.s. 8. I'edro — S. Diego ; common near shore. 



7. Neara pectinata. Santa Barb., Cat. Is., 40-GO fin. (Puget iSd., Kennmey). 



8. Ki nnerlia bicarinata, n.s. Cat. Is., 40-00 fin. ; rare. 



9. Entodemia in/lata, Conr., = diap/iana,CpT. N'eiU* S. Diego ; 1 valve (Pw/mjc/*). 



10. rii'ctodon scahcr, n.g. and n.s. Cat. Is. ; 2 similar valves, 40-00 fm. 



11. Macoma inf/iiin<ifa. S.Francisco; rare. 



12. Macuma yohU/ormis. S. Diego. (Puget Sound, Kennerley.) 

 1;}. Macoma indodata, n.s. S. Diego. 



14. Anyidus varicyatin, n.s. Mont., Cat. Is., 20-00 fin. ; rare. (Neeah Bay, Swan.) 



15. Arcojxiyia laimdlata. S. Diego. =Maz. Cat., no. o8. 



10. (Edalia ( Cooperelh) scintillctformis, u.suhg., n.s. S.Diego. Santa Barbara la. 



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



18. Semcle pidchra. S. Diego. (Also Cape St. Lucas, Acapulco.) 



19. Scmele inconyrua, n.s. Catalina Is., 40-00 fm. ; couinion. 



20. Pii-phis nalmonea, n.s. S. Diego, Cat. Is., 3' '-40 fm. ; rare. 



21. Piteplii^ Lordi. Cat. Is., 20-40 fm. ; common. (Puget Sound, A'enww/*?]/.) 



22. 'fA4arte Jiiictuatd, n.s. Cat. Is. ; 2 similar valves : 40 fm. (Very like the Crag 



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



23. Vi'tiericardia borealis. Cat. Is., 120 fm. The typical. Hat New England form. 



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

 30-40 fm. 



24. 3fiodon prolongatus. (Xeeah Bay, Swan.) Identified from tracing only. 



25. Tra;)cziiiin. One extremely young sp.= Maz. Cat., no. 120 (not like T. Z>m- 



perryi). S. Diego. 

 2''). C/iama ?spinosa. S. Diego. (One young valve sent.) 



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



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



28. Ilcmicardittm hiaiiyulatum. Cat. Is., living iu 10-20 fui. (Also Acapulco, 



I'anama.) 



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



30. Liicina U'mmcidpta. S. Diego, living in 4 fm. ( Also Puget Sound, Kimnfrhy.) 



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

 no. 144). 



31. Lticina borealis. Cat. Island, 120 fm. " =L. acuteJirata, Conr., foss. E. E." 



[Fxactlv agrees with British examples.] 



32. Cryptodo'nfexuosun. Cat. Is., 120 fm. Ditto. 



3."). Krii'ia mbufbictiktris. S. Diego ; Cat. Is., 30-40 fm. Ditto. 



34. Killia (var.) C/iironii. S. Diego. (Also Neeah Bay, iSiian.) 



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

 T)*!. l.epton mevoeinn, n.s. S. Diego. 



37. Tillimya tuinida. S. Diego. {\.\bo Puget Sound, KennnrUy.) 



38. Pridfs ohlonyus, n.g., n.s. S. Diego. 



SO. CrrncUa dec'm<ata. Cat. Is., 10-40 fm. ; not rare. (The ordinary British, not 



the New England form.) 

 40. Bnrbatia gradata. S. Diego ; Mai. Cat., no. 104. 

 4m A.rinfca iidermedia. Monterey — S. Diego, Cat. Is., 40-60 fm. [Scarcely differs 



from the South American shelL It is the A. liaibaremis, Conr., of Pac. 11. 



K. fossils, teate Cooper. J 

 7 97 



