58 



Conchology — By Exchange. 



ii specimens of Fluminicola nuttallina Lea. 



5 



seminalis Lea. 



2 " « 



pirens Lea. 



I " ' 



' Gadinia reticulata Cpr. 



7 



i " ' 



' Goniobasis nigrina var. 

 " plicifera Lea. 



3 



2 " 



I " ' 



" var. oregonensis Lea. 

 ' I sap is fenestrata Cpr. 

 ' Limnaa bulimoides Lea. 



I " ' 

 I " ' 



" decollata Mgh. 

 " lanceolata Walk. 



2 " 



' " nuttalliana Lea. 



I " 



' Liotia acuticostata Cpr. 



3 

 3 

 3 

 3 

 i " ' 



' Lyonsia californica Cpr. 

 ' Mangelia striosa Adams. 

 ' Marginella jewettii Cpr. 



pyriformis Cpr. 

 ' Metis alta Conr. 



i " ' 



2 " ' 



' Monoceros lugubre Swb. 

 ' Murex incisus Brod. 



I " ' 



' " nuttallii Conr. 



I " ' 



' Ovula avena Sowb. 



I " 



' " dejiexa var. barbarense Dall. 



I " ' 



' " uniplicata Sowb. 



I " ' 



' Pedicularia californica Newc. 



IO " ' 

 I " ' 



1 Phasianella perforata Phil. 



' Physa ancillaria var. maqualacustus Walker 



2 " ' 



' Planorbis lentens Walker. 



3 



binneyi Walker. 



i " * 



' Pomatias gracilis Pfr. 



i '■' ' 



" herei Sloss. 



i 



i " ' 

 i " ' 



" philippianus Gade. 

 "v. plumbeus West. 

 " scalarinus Villa. 



i " ' 



" septemspiralis Raz. 



i " ' 

 i " ' 



' Semele rupium Cpr. 

 ' Triton gibbosus Brod. 



2 



1 " ' 



1 Valvata virens Tryon. 



1 Vitrinella complanata Cpr. 



Mrs. H. A. ZECH, Los Angeles, Cal. 



IO Specimens of Cooperella subdiaphana Cpr. 

 12 " Helix kelletti Fbs. 



8 " " gabbi Newc. 



12 " Haminea vesicula Gld. 



5 " Ianthina exigua Lam. 



