coLiMACEA. MOLLUSCA. PUPA. 189 



minute one at the front of the pillar, and two farther within the 

 shell, one opposite the tooth on the transverse lip, the other on 

 the indentation of the outer lip ; umbilicus small, distinct. 

 Length /„ inch, breadth -^'^ inch. 



Inhabits damp, rich places, near water, or in fertile fields under 

 bits of board, chips, sticks, he. It was first noticed in this 

 region by Mr. T. J. Whittemore, at Cambridge. Mr. Say- 

 found his specimens in the North West Territory. 



It is a very small, but interesting shell ; double the size, however, 

 of the preceding species, and of a much more conical shape. Their 

 color is similar. In their armature the two are very different. The 

 pillar lip is somewhat broad and flattened. 



Mr. Say describes only four teeth, but the small one at the base of 

 the pillar probably escaped his observation, as it would only be seea 

 under a high magnifier. One of the teeth on the right lip is often 

 wanting. I have occasionally noticed a specimen with two, and evea 

 three, teeth upon the transverse lip. 



Pupa cu'rvidens. 



Shell elongated-ovate, obtuse at apex, smooth; whorls Jive ; 

 aperture sub-triangular, armed with nine teeth, the two largest 

 of which are curved ; lip white, broadly everted; umbilicated. 



Figure 120. 



State Coll., No. 89. Soc. Cab., No. 2396. 



Shell minute, ovate, but much elongated ; of a spermaceti- 

 white color ; whorls five, convex, smooth, gradually diminishing 

 to an obtuse apex ; suture deeply impressed ; aperture sub-trian- 

 gular, with the front and outer angles rounded, and the outer lip 

 curved inwards, so as almost to make the aperture heart-shaped ; 

 the transverse margin is straight, and slightly oblique ; the inner 

 lip is also nearly straight, so that these two form a right angle at 

 their junction ; lip widely reflected, flattened, white ; throat 

 armed with nine teeth ; the longest, somewhat curving to the left, 

 compressed and pointed, is situated on the middle of the transverse 

 lip, and has a sn)all one seated at its left side ; at the front, 

 nearly opposite the large tooth, almost as large and inclined to 



