NEW MELANID.E OF THE UNITED STATES. 287 



me are more or less angulate on the periphery. None have bauds. The aperture is 

 about two-ninths the length of the shell. I name this after Mr. Postell, to whom I 

 am indebted for specimens of this and many other new species of Mollusca. 



Trypanostoma Tuometi. PI. 36, fig. 111. 



Testa carinata, erassiuscula, clevato-conica, tenebroso-fusca; spira elevato-conica ; suturis vis impressis- 

 anfractibus instar deuis, planulatis, inferne obsolete striatis ; apertura parva, rhoniboidca, intiis tene- 

 brosa ; Iabro acuto, sinuoso ; columella inferne parum incrassata et valde contorta. 



Shell carinate, somewhat thick, high conical, dark brown ; spire attenuate conical ; 

 sutures scarcely impressed ; whorls about ten, flattened ; aperture small, rhomboidal, 

 very dark within ; outer lip sharp, sinuous ; columella a little thickened below and 

 very much contorted. 



Proc. Acad. Nat. Sci., 1862, p. 171. 



Hab.— North Alabama, Prof. Tuomey ; Florence, Alabama, Rev. G. White. 



My cabinet and cabinet of Mr. White. 



Diam - " 45 > Length 1-23 inch. 



Remarks.— I have about a dozen specimens before me from the two habitats. In 

 outline and size it is perhaps nearest to Melania {Trypanostoma) elongata (nobis) from 

 West Tennessee, but it is easy to distinguish it from that species, by its being rather 

 more slender, and its being darker. In outline and color it is very close to Melania, 

 (Trypanostoma) Brumbyi (nobis), but it differs in the form of the mouth and in not 

 being striate. The aperture is rather more than one-fourth the length of the shell. 

 I have great pleasure in dedicating this species to my deceased friend, Prof. Tuomey, 

 to whom I am greatly indebted for many new and interesting species collected by him- 

 self while engaged in his geological survey of the State of Alabama. 



Trypanostoma Florencense. PI. 36, fig. 112. 



Testa subcarinata, turrita, subcrassa, tenebroso-fusca vol lutco-cornea; obsolete vittata vel evittata ; spira 

 valde elevata; suturis leviter impressis; anfractibus instar undenis, parum convesis ; apertura' parvi- 

 uscula, rhomboidea, intiis eseruleo-alba ; labro acuto, sinuoso ; columella albida et valde contorta. 



Shell subcarinate, turrited, rather thick, dark brown or yellowish horn-color ; spire 

 very much raised; sutures slightly impressed ; whorls about eleven, slightly convex; 

 aperture rather small, rhombic, within bluish white; outer lip acute, sinuous; colu- 

 mella whitish and very much twisted. 



Proc. Acad. Nat. Sci., 1862, p. 171. 



Hob.— Florence, Alabama, Dr. Spillman ; Tuscumbia, L. B. Thornton, Esq. 

 My cabinet and cabinets of Dr. Spillman and Mr. Thornton. 



Diam - * 59 ' . Length 1-65 inch. 



Remarlcs.— This is a large, rather slim species. Among eight specimens, the longest 



is one inch and six-tenths. It is nearly allied to Melania, (Trypanostoma) elongata. 



