EASTERX PROVINCE— SOUTHERN REGION SPECIES. 387 



recently been called THodopsis Henrietta by Mazyck, Proc. Phila. 

 Acad. Kat. Sci., 1877, 297. I hardly cousider it distinct. His descrip- 

 tion and a figure of his type are given here : 



Shell rimately umbilicated, depressed, globose, rather solid, with 

 numerous regular, delicate striae, dark-brownish horn-color; fig. 421. 

 s[)ire obtuse; whorls about five and a half, slightly con- 

 vex ; suture deeply impressed; l>eneath convex, smoother 

 than above; umbilicus very deep, reaching the aj^ex, but 

 only exhibiting the last three whorls, grooved within; 

 body-whorl gently ascending just behind the aperture 

 and then suddenly and shortly deflected, very much con- 

 stricted behind the peristome, with two deep exterior 

 pits, having the space between them elevated into a pronii- t. Henriettce. 

 nent ridge; aperture subtriangular, peristome much thickened within 

 and very slightly reflexed, very tortuous, yellowish-white, furnished 

 with a small denticle near its upper termination and an erect, lamelli- 

 form tooth, which is equal in length to about one fifth the diameter of 

 the base of the shell, extending from the lower end of the uppermost 

 pit almost to the inner edge of the body-whorl; low down in the mouth 

 of the shell there is, between this tooth and the denticle, a large, white, 

 tongue-shaped, concave tooth, and very near this, but rather lower 

 down in the mouth of the shell and on the base of the body-whorl, 

 there is an oblique, stout, white tooth, which is sometimes slightly cleft 

 on the edge ; the parietal wall, which is covered with a semi trans- 

 parent callus, bears a very strong, arcuated, entering, white tooth, whose 

 outer margins form almost a right angle. Diam. maj., ^; min., -j^; 

 alt., J inch. 



Eastern Texas (Mr. Jacob Boll). 



This species more nearly resembles Helix vultuosa, Gld., than any 

 other ]S^orth American species, but differs from that shell in the shape 

 and size of the umbilicus and in the form and armature of the aperture, 

 which m vultuosa is lunate, almost circular, and in this sjiecies is rather 

 V-shaped ; in vultuosa the peristome, though moderately so, is decidedly 

 reflexed, and its plane is almost entirely unbroken; in Henriettce it is 

 very much thickened, but scarcely at all reflexed, is very tortuous, and 

 bears on its inner margin an obtuse denticle and a long, lamelliform, 

 erect tooth, which are wanting in vultuosa; in Henrietta' the two in- 

 ternal teeth are so far within the aperture as to be seen only on looking 

 into it, while in vultuosa they are plainly visible from the base of the 



