GOKIOBASIS. 151 



Figure 283 is a copy of the original figure. 284 and 285 

 are from specimens in the Smithsonian collection. Like Hal- 

 le)ibec]iii, this species is numerous in individuals. Many spec- 

 imens are light green with raised, revolving lines of very dark 

 color, giving them a strikingly handsome appearance. 



So great are the variations of form in this shell and in cate- 

 nai'ia, that I should not be surprised if the latter proved to be 

 a 3'ounger stage of the former. 



15. G. Bentoniensis, Lea. 



Goniobasis Bentoniensis, Lea, Proc. Acad. Nat. Sci., p. 271, 1862. Jour. Acad. Nat. 

 Sci. V, pt. 3, p. 336, t. 38, f. 198, March, 1863. Obs. ix, p. 158. 



Description. — Shell carinate, folded, striate, conical, greenish horn- 

 color, without bauds ; spire raised, conical ; sutures very 



Fig. 286. 



much impressed ; whorls seven, slightly convex ; apertui-e 

 rather small, ovately rhomboidal, whitish within ; outer lip 

 acute, scarcely sinuous ; columella bent in, somewhat 

 twisted. 



Habitat.— Benton County? North Alabama; G. Hallenbeck. 



My cabinet and cabinet of Dr. Hallenbeck. 



Diameter, -39 ; length, -93 inch. 



Observations. — There are two specimens before me sent by Mr. Hal- 

 lenbeck. He is not positively certain that they were found in Benton 

 County. Both these have revolving stria; over all the whorls. The 

 upper whorls have folds which, where they cut the stria?, are raised 

 into obtuse nodes. The larger striaj on the body-whorl are repre- 

 sented on the inside by white lines. It is rare that any species is 

 carinate, plicate and striate at the same time. It is allied to Melania 

 {Goniobasis) Boykiniana (nobis), but is not tuberculate, nor is it so 

 large. The aperture is about one-third the length of the shell. — Lea. 



Doubtfully distinct from papillosa, Anthony. 



16. G. papillosa, Anthony. 



Melanin papillosa, Anthony, Ki:i;vi;, Monog. Mel., up. 46", May, 1801. BnOT, List, 



p. 34. 

 Goniobasis Dotvnieana, Lea, Proc. Acad. Nat. Sci., p. 272, 18G2. Jour. Acad. Nat. 



Sci., V, pt. 3, p. 341, t. 38, f. 206, March, 1863. Ob.s. ix, p. 163. 



Description. — Shell somewhat pyramidally ovate, fulvous-olive: 



