LIMNEA CATASCOPIUM. 



DESCRIPTION. 



Animal light or dark yellowish-brown, mi- 

 nutely sprinkled with light yellowish: tentacles 

 short, translucent, and light colored at their 

 anterior base: foot about as long as the aper- 

 ture, rounded posteriorly, wdth the base very 

 minutely and thickly dotted. 



Shell smooth and polished; composed of 

 four or five convex whirls, in which the lines of 

 growth are lightly marked; body whirl large 

 and ventricose: suture well marked; spire 

 shorter than the aperture; tapering to an acute 

 point: aperture ovate: labium concave, with 

 the fold well marked. 



Variety, L. pinguis. "Shell oval, rather ven- 

 tricose, pale dirty yellowish: whirls nearly four, 

 rapidly diminishing to the apex, which is dull 

 fulvous: suture moderate: spire rather more 

 than half the length of the aperture: aperture 

 large: labrum with the inner submargin a little 

 thickened." — Say. 



Color of the outside ochre yellow, but fre- 

 quently covered with a coating of black foreign 

 matter: inside sienna yellow. 



Foreign analogue. Limnea peregra, Drap. 



