31 



LIMNEA DESIDIOSA, Say. 



Plate 10. 



L. testa sub-inflata, perforata, tenui, lutea: spira at- 

 tenuate., apice acuto: anfractibus 5 convexis: sutura valde 

 impressa. 



SYNONYMS AND REFERENCES. 



Limneus desidiosus, Say. Jour. Acad. Nat. Sci., vol. 



ii. p. 169. — Am. Conch., pi. 55, fig. 3. 

 L. obrussa ? Say. Jour. Acad. Nat. Sci., vol. v. p. 123. 

 L. acuta, Lea. Trans. Am. Phil. Soc, (new series,) vol. 



v. pi. 19, fig. 81. 

 L. Philadelphia, Lea. ib. Proceedings, vol. ii. p. 32. 



DESCRIPTION. 



Animal with the foot as long as the two last 

 whirls: tentacles short, broad, and translucent: 

 color light yellowish-grey, dark upon the mid- 

 dle and light upon the edges: surface minutely 

 dotted with whitish, which forms spots between 

 the eyes. 



Shell somewhat inflated, thin in texture, 

 and translucent: lines of accretion rather coarse: 

 surface occasionally broken by a tendency to 



