THE NAUTILUS. 



23 



(4) Mr. Cockerell truly says that PhilomycKs like Limdcella was 

 inaccurately defined by Rafinesque. It would be well for us to 

 adopt Fischer's course, and write " Philomycns Ferussac, 1821." 

 Ferussac fixes the identity of the genus with certainty by including 

 the species cfirolinensis, which he describes and figures very well. 



Note. The writer desires to make a more careful study of the 

 species of Philomycus (Tebennophorus), and will be glad to receive 

 specimens. They are best if prepared by drowning in a vessel of 

 water from which air has been excluded. Transfer to alcohol (or 

 whiskey) and water, the former slightly in excess. They may then 

 be sent safely by mail in an ordinary box, if removed from the 

 spirit and wrapped in paper or muslin wet with spirit. — H. A. P. 



GENERAL NOTES. 



Mr. Henry Hemphill has left San Diego for a summer in the 

 north. 



Shells of Erie Canal. — Taking advantage of the annual 

 spring cleaning of the Erie canal, I spent one day in April of the 

 present year collecting mollusks between Ilion and Utica with the 

 following results : 



Unio Tappaniarms Lea, 



JJnio rubiginosxis Lea, 



Unio luteohis Lam., 



Unio complanaius Sol., 



Margariiana marginata Say, 



Margaritana undulata Say, 



Margaritana riigosa Barnes, 



Anodonta edentula Say, 



Anodonta subcylindracea Lea, 



Anodonta Leivisii Lea, 



Physa heterostropha Say, 



Campeloma decisum Say, 



Goniobasis Virginica Gmelin, 



Vivipara contectoides W. G. Binne^ 



Planorbis irivolvis Say, 



Sphceritun striatinum Lam., . 



LimncECi catascopium Say, 



All were collected without a dredge. — Albei 

 New York. 



350 specimens. 



15 



27 



38 



1 



18 



28 



24 



6 



91 



150 



46 



379 



5 



8 



12 

 2 

 t Bailey, Chejxichet 



