31 



PHYSA FRAGILIS, Migh. 



Plate 3.— Figs. 11—13. 



Testa ovata, pallida, tenuissima, fragili: apertura lata, 

 repanda. 



SYNONYMS AND REFERENCES. 



Physa fragilis, Mighels. Boston Jour, of Nat. Hist., 

 vol. iv. pi. iv. fig. 12. 



DESCRIPTION. 



Animal "of a very obscure, light green color; 

 whole surface of the body covered with oblong 

 dark spots; foot shorter than the shell, lanceo- 

 late; tentacles nearly white, rather long, very 

 slender; mantle blood-red." 



Shell obliquely ovate, translucent, extremely 

 fragile and delicate: suture well marked: aper- 

 ture very wide, labium not closely appressed, 

 and without columellar fold. 



Geographical Distribution. Inhabits Maine. 



OBSERVATIONS. 



Allied to P. ancillaria, but is distinguished by 

 its greater tenuity, wider aperture, the tendency 



