41 



LIMNEA HUMILIS, Say. 



Plate 13.— Figs. 1—8. 



L. testa parva, ovato-conica, tenui, umbilicata: anfracti- 

 bus 4 — 5 convexis: sutura impressa. 



SYNONYMS AND REFERENCES. 



Lymneus humilis, Say. Journ. Acad. Nat. Sci., vol. ii. 



p. 379. 

 Lymneus modicellus, Say. Journ. Acad. Nat. Sci., 



vol. v. p. 122. 

 Lymnea modicellus, Gould. Invert, of Mass., p. 218, 



fig. 149. 

 L. parvaI Lea. Proceed. Am. Phil. Soc, vol. ii. p. 33. 



DESCRIPTION. 



Animal as far as exposed, translucent; ex- 

 cept the central portion, which is very light 

 brown: tentacles short, triangular, with a black 

 point upon the anterior basal edge. 



"Shell (L. humilis) ovate conic, thin, trans- 

 lucent, with slight wrinkles; volutions nearly 

 six, convex, terminal one very minute; suture 

 well indented; aperture about equal in length 

 to the spire; labium with an obvious plate of 



K 6 



