ON MOLLUSCA OF THE WEST COAST OP NORTH AMERICA. 673 



Subfam. Succinina, 



t57. Siecciiuu '■ ((Sucinnea) Hawhinsi, Baird. British Columbia, Lord. 

 t58. Siwcinea (Sucmnea) cingulata, Fbs. Mazatlan, Kellett and Wood. 

 59. Succinea (Succinea) rusticana, Gld. Oregon and Calipoenia : — Oregon, 



U. S. E. E.; Ocog-o Creek, California, Williamson. 

 6C. Succinea (Succinea) Nuttalliana, Lea. "Scarcely differs from S. ovalis, Hudson 

 River," Old. Ohe&on and OALrPORNiA: — Lewis's River, Or., NvitaU ; In- 

 terior of Oreg., U. S. E. E. ; Wright's Lake, Rhell's Lake, Cal., Neivberry. 

 G], Succinea (Succinea) Oreffonensis, Tiea. " Resembles iS. m«reo," Grid. OnBaoN 

 AND CALrFOBNiA : — Oregon, Nuttall. San Francisco, Rowell. 



Subfam. Liniacina. 



62. lAmaoc J (Amalia) Columbiamis, Gld. Pugbt Sound to San Fbancisco : — 



Puget Sound, U. S. E. E., Byes ; Oregon City and Cape Flattery, Wil- 

 liamson ; San Francisco and Port Oxford, Trowbridge ; Nisqually, Case. 



Fam. Arionidce. 

 Subfam. Arionina. 



63. Arion (Loohea) foUolattis, Gld. Puget Sound, U. S. E. E., Pichering. 



Subfam. Zcniti.'ia. 



64. Zonites § (JEgopis) cultellata, Thorns. " Closely resembles the Dalmatian S. 



alhanica and aaes." Contra Costa Co., Cal., common, Thomson. 



Fam. Onchidiadce. 

 66. Onchidium Carpenteri, Binn. Cape St. Lucas, Xantus. 



Limnophila. Fam. Auricididte. 

 Subfam. Melampince. 



66. Melampua olivaceus, Cpr. San Diego to Mazatlan : — Mazatlan, Reigen ; 



San Diego, Make, Cooper. 



67. Pedipes lirata, Binn. Lower Califobnia : — C. S. Lucas, Xantus ; San Diego, 



Cooper. 



Fam. Limnceidee. 



Subfam. Zimneeince, 



68. lAmnaa (lAmnced) stagnalis,lAT:m.,-\-L. jugularis, Say, Hald., De Kay, Kiist., 



Biim. (1st list), 4- -E. appressa, Say, Hald.,De Kay, Kiist., C. B. Ad..+X. spe- 

 ciosa, Ziegl. EmiOPE, Asia, America : — RhettLake, California, Neivherry ; 

 Ruby Valley and S. Utah, Captain Simpson. Fort Simpson and Hudson's 

 Bay, common; throughout British America and northern tier of TL S., 

 from Vermont to Pacific, teste Binn. [Var.=i/'. fragilis, Linn., teste 

 Hani., Ips. Linn. Conch, p. 38.5 ; non Rve., Binn. (1st list).] 



69. Limncsa (lAmnma) lepida, Gld. Lake Vancouver, U. S. E. E. 



70. Limncea (Limnophysa) reflexa, Sa}', Hald., De Kay, Kiist., +i. elongata, Say, 



L. umbrosa, Say, Hald., De Kay, Kiist., +X. exilis+L. Haydeni, Lea. San 

 Francisco, Powell. Also through British America and northern tier of 

 States from New York to Paoiiie ; teste Binn. 

 t71. Limncea (Limnophysa) Sumassii, Baird ||. 



* So great is the difficulty of ascertaining (even approximately) the specific relations of 

 Succinece without a comparison at least of single specimens, that Mr. Binney considers it 

 safest, until series have been examined, simply to quote the species which have been de- 

 scribed by other authors. He has followed the same course witli Ancylits, and for the 

 same reason. 



J " Has a pore. Why not Arion ? " — Binney, in MS. list. 



§ This appears among " doubtful speeies " in tlie MS., but is printed in the text of 

 the Check-List. 



II Probably a variety of ^oZMs<n*=A^«iteffiana, Lea. British authors have as yet had 

 but poor opportunities of studying typically-named American h-eshwater Pulmonatip, 



1863. J59 



