PiivsA. 85 



Pliijsa oscuhins, Haldemax, Mon. part, f. 11, 12. 



I'hi/sa striata, Menke, Syii. Meth. ed. 2, p. 132 (1830), teste Hakleman. 



Phijsa suharata, Menkk, Syn. Meth. ed. 2, p. 132 (1830), teste Haldeman. 



P/ii/sa rharpentieri, KiJSTEK iu Chejin. ed. 2, p. 23, pi. iv, f. 4-6. 



Phy^a phili])pi, Kustek iu Chemx. ed. 2, p. 19, pi. iii, f. 3-6. 



Plujsa ivflata, Lea, Proc. Am. Phil. Soc. II, 32 ; Trans. IX, 7 ; Obs. IV, 7. 



Helix hete.rostrophus, Eaton, Zool. Text-Book, 195 (1826). 



Bulla crassula, Dillwyn, Conch, tab. 1, 4S7, No. 3G=:fontinalis, Chem- 



KiTZ, Conch. IX, 33, pi. ciii, f. 879, 880, var. 3.— Gmelin, Syst. 3407. 



— ScHEOTER, Einl. t. I, 261, Helix No. 84. 

 Cochlea neritoides, Lister, Conch, pi. cxxxv, f. 34. 



Of this species I have seen specimens from Texas and Georgia, 

 and from as far north as Great Slave Lake. It ranges from the 

 Atlantic to the Pacific. It is our most common species. 



Mr. Say's types are still in the collection of the Philadelphia 

 Academy. One is drawn in Fig. 144. 



Physa fontana, formerly described as distinct, is referred to 

 this species bj Haldeman (Mon. p. 26). His description here 

 follows : — 



Physa fontana. — Animal dark fuliginous, foot as long as the shell ; shell 

 ovate, translucent, composed of three convex turns ; apex eroded ; suture 

 •well marked ; labium nearly straight, with a slight fold ; color yellowish- 

 brown. Length \ inch. 



Inhabits cold springs in Pennsylvania. 



Closely resembles P. fontinalis of Europe, but the foot is shorter. 

 (^Haldeman.) 



Among the shells figured by Haldeman as Fhysa osculans 

 appear some of this species. He says of them : — 



Physa osculans. — The United States specimens of this shell Fig. 146. 

 will merge into P. heierostropha. One specimen, supposed to 

 be from the West, is in reality from Mexico. This appears 

 distinct, and may retain the name until I learn more about 

 it. Although the aperture is narrow, some specimens in the 

 Academy's collection have it very wide. 



My opinion of the identity of Fhysa striata and 

 Fhysa subarata, of Menke, is founded on his descrip- 

 tion alone, having seen no authentic specimens. His 

 words are : — 



Physa striata, Mexke. — Shell ovate, sub-opaque, reddish horn colored ; 

 last whirl longitudinally, elegantly and lightly striated ; spire short, 

 obtuse ; internal margiu of the labrum doubled, the exterior obsolete, 



