PLEUROCERA. 121 



it is a very much smaller species aud cannot be easily confounded 

 with it. — Lea. 



Figure 227 is from Mr. Anthon)''s t3'pe specimen. Figure 

 228 is a copy of Mr. Lea's figure quoted above. 



62. P. Vanuxemii, Lea. 



Trypmwstoma Vanuxemii, Lea, Proc. Acad. Xat. Sci., p. 175, 1863. Jour. Acad. 

 >;at. Sci. V, pt. 3, p. 280, t. 3G, f. 98. Obs. ix, p. 102. 



Dcscriptioii. — Shell smooth, conical, yellowish, double-banded or 

 without bands ; spire obtusely conical ; sutures impressed ; whorls six, 

 somewhat convex; aperture rather small, subrhomboidal, whitish 

 withiu ; outer lip acute, sinuous ; columella thickened below and 

 much twisted. 



Habitat. —South Carolina ; Prof. L. Vanuxem. 



Diameter, -28; length, -09 inch. 



Observations. — Among other species of the Melanidce given to me 

 a long time since by my friend, the late Prof. Vanuxem, were four 

 specimens of this. Three of them are double-banded inside Fig.229. 

 and out. The fourth has no appearance of bands. One of 

 them is about half grown aud perfect to the apex. The outer 

 lip is somewhat thickened and expanded. It is somewhat like 

 hivittatum, herein described, but it diflers in having a higher 

 spire, is not so wide proportionally, and is not highly polished 

 or so yellow as that species. The aperture is more than one-third the 

 length of the shell. — Lea. 



Figured from Mr, Lea's i)late. Too closely allied to the 

 preceding. 



63. P. Chakasahaense, Lea, 



Trypanostoma Chakasahaense, Lea, Proc. Acad. Nat. Sci., p. 175, 18G3. Jour. 

 Acad. Nat. Sci., v, pt. 3, p. 280, t. 3G, f. 99. Max-cli, 18G3. Obs., ix. p. 103. 



Fig. 230. Description. — Shell smooth, conical, brownish-green, rather 



^. thin, double-banded ; spire somewhat attenuate ; sutures very 



f^:^ nmch impressed; whorls about eight, convex, carinate above; 



/ rture small, rhomboidal, white and banded within; outer 



L ' sinuous ; columella incurved, thickened below and very 



'',a^ i.iuch twisted. 



Habitat. — Chakasaha River, Mississippi; "\Vm. Spillman, M. D. 



