102 



THE NAUTILUS. 



Pristiloma stearnsi Bid. 

 Punctum conspectum Bid. 

 Pnnctura randolphi Ball. 

 Epiphragmophora fidelis Gray. 

 Epiphragmophora fidelis minor. 

 Epiphragmophora fidelis albino. 

 Polygyra (Mesodon) towusendi- 



ana Lea. 

 Polygyra (Mesodon) columbiana 



Lea. 



Polygyra (Mesodon) devia Gld. 

 Polygyra (Stenotrema) germana 



Gld. 



Vertigo simplex Gld. 

 Vertigo binneyana Sterki. 

 Succinea oregonensis Lea. 

 Succinea nuttalliana Lea. 

 Carychium occidentalis Pilsbry. 

 Anodonta californiensis Lea. 

 Anodouta oregonensis Lea. 



Margaritana margaritifera Linm- 

 Spbaerium nobile Gld. 

 Sphaerium raymoudi J. G. C. 

 Sphaerium primeanum Cless. 

 Pisidiuui compressum Prime. 

 Pisidium idalioense Roper. 

 Pisidium ultramontanum Prime. 

 Pisidium variabile Prime. 

 Pisidium abditium Hald. 

 Pisidium randolphii Roper. 

 Physa gabbi Tryon. 

 Limnsea tryoni Lea. 

 Limuwa palustris Linn. 

 Limneea humilis (introduced) 



Say. 



Planorbis trivolvis binneyi Try. 

 Planorbis callioglyptus Vanatta. 

 Planorbis vermicularis Gld. 

 AiH-ylus fragilis Trynn. 

 Valvata sincera Say. 



ISAAC LEA DEPARTMENT. 



[Concluded in the interest of the Isaac Lea fonchologieal Chapter of the Agassiz Associa- 

 tion by its General Secretary, Mrs. M.Burinu Williamson. 1 



Next month we will be able to announce the result of the annual 

 election of officers for the Chapter. 



This has been a year of activity along couchological lines in our 

 chapter, and plenty of good reports are sure to follow enthusiastic 

 work. 



The fraternal spirit expressed by the members of our Chapter 

 reveals the goodwill of each member, and is a pleasant feature in 

 work of the Association. 



COLLE TING IN SOUTHERN CALIFORNIA. 



[Report of Mrs. G. \V. \Vhiu-. From the Transactions of Isaac Lea Conchological 

 Chapter of the Agassiz Association for 1894.] 



My interest in the science of conchology dates from the summer 

 of 1893, when Prof. Josiah Keep, of Mills College, taught this sub- 



