336 NEW UNIONID^, MELANID^, ETC., 



is a very small species, and somewhat like Glarkii (nobis), but it is rather more 

 cylindrical. Some specimens have scarcely the rudiments of folds, while others have 

 them down to the last whorl. Some have strise on the lower part of the whorl. The 

 aperture is about one-fourth the length of the shell. 



GONIOBASIS COCHLIAEIS. PI. 54, fig. 16. 



Testa carinata et striata, cylindracea, tenui, tenebroso-fusca, evittata ; spira attenuata; suturis valde 

 impressis ; anfractibus instar novenis, ad apiceni valde carinatis, inferne striatis ; apertura 

 parvissima, late elliptica, intus tenebrosa ; labro subcrenato ; columella inflexa, ad basim 

 incrassata. 



Shell carinate and striate, cylindrical, thin, dark brown and without bands ; spire 

 attenuate ; sutures very much impressed ; whorls about nine, very much carinate at 

 the beaks, striate below ; aperture very small, widely elliptical, dark within ; outer 

 lip subcrenate ; columella inflected, thickened at the base. 

 Proc. Acad. Nat. Sci. 1868, p. 152. 



ffah. — Shelby Co., Alabama, Major T. C. Downie. 



My cabinet and cabinet of the Academy of Natural Sciences. 

 Diam. -14, Length -59 inch. 



BemarJcs. — This little cylindrical species is near to rubella (nobis), but may at once 

 be distinguished by its gimlet-like form, which is very remarkable, being almost 

 exactly the same with the point of that instrument. There are usually five well- 

 defined strias on each specimen, and that on the middle of the whorls is so large as 

 to make the shell carinate. Above this carina on the upper whorls there is a chain 

 of bead-like nodes. The basal stria3 inside are disposed to be purplish. The aperture 

 is about the fifth of the length of the shell. 



GONIOBASIS VENUSTA. PL 54, fig. 17. 



Testa subcarinata, conoidea, subtenui, mellea, evittata ; spira elevata ; suturis regulariter impressis ; 

 anfractibus planulatis, instar septenis ; apertura parva, rbomboidea, intus albida ; labro acuto ; 

 columella inflexa et valde contorta. 



Shell subcarinate, conoidal, rather thin, honey-yellow, without bands; spire 



elevated; sutures regularly impressed; whorls flattened, about seven ; aperture small, 



rhomboidal, whitish within ; outer lip acute ; columella inflected and very much 



twisted. 



Proc. Acad. Nat. Sci. 1868, p. 152. 



Eab. — Coosa Kiver, Alabama, Dr. Showalter. 



My cabinet. 



Diam. '32, Length '75 inch. 



