17 



AMNICOLA GRANUM, Say. 



A. (LIMOS^E affinis) testa minuta, conica, curta, late um- 

 bilicata; apertura rotundata. Long. 2 mm. 



SYNONYMS AND REFERENCES. 

 PALUDINA GRANA, SAY. J. Acad. Nat. Sci., vol. ii. p. 378. 



DESCRIPTION. 



SHELL "conic-ovate; whorls not perceptibly 

 wrinkled, convex; suture deeply impressed; 

 aperture orbicular, hardly angulated above; 

 labium with the superior edge appressed to the 

 surface of the penultimate volution; umbilicus 

 rather small, profound." 



" This very small species is found in plenty in 

 the fish ponds at Harrowgate, [near Philadel- 

 phia,] crawling on the dead leaves which have 

 fallen to the bottom of the water. It resembles 

 P. lustrica, but is a smaller, less elongated shell, 

 and the superior portion of the labium is not an 

 unaltered continuation of the lips as in that 

 shell, but is appressed to the surface of the 

 penultimate whorl in the usual manner of cal- 

 careous deposition upon that part." Say. 



E 3 



