NEW MELANID.E OF THE UNITED STATES. 28S 



Remarks. — This is a short thick species with a fine natural olivaceous polish. A 

 specimen from Prof. Troost has been in my possession mkny years, and is the most per- 

 fect. It has two obscure bands inside. Another I recently obtained from Dr. Ilartman, 

 who received it from Prof. Tuomey. A third is an old eroded specimen, quite brown, 

 sent by Mr. Downie. After the above description was made, I received from Mr. 

 James four specimens, neither of them entirely mature, which he took in the Ohio 

 River at Cincinnati. Two only have the ligatures round the periphery of the last 

 whorl. Two have four bands; one has two well-defined bands and two are without. 

 One of the two without bands is of a very dark brown, and the other very light 

 brown. The aperture is nearly one-half the length of the shell. The obsolete bands 

 within are dark brown, but the spot at the base of the columella is of a bright 

 reddish color. The upper part of the whorls, which are slightly rounded, are of a 

 yellowish color. Very different from the description of Melcmia ligata, described by 

 Menke, Synposis, p. 82. 



Trypanostoma Pybasii. PI. 36, fie;. 115. 



Testa obtuse earinata, obtuse conic;!, solid;!, bivittata. viridi-fuscst ; spira obtusa; suturis valde impressig; 

 anfraetibus iustar octonis, convexiusculis ; apertur;! parva, rhombic!, intiis alba et vittata ; labro 

 acuto, valde sinuoso ; columella inferue incrassata et valde contort;!. 



Shell obtusely carinate, obtusely conical, solid, double-banded, greenish brown ; 

 spire obtuse; sutures much impressed; whorls about eight, slightly convex ; aperture 

 small, rhombic, white and banded within ; outer lip acute and very sinuous; colu 

 mella thickened below and very much twisted. 



I>roc. Acad. Nat. Sci., 1862, p. 172. 



Hab. — Tuscumbia, Alabama, B. Pybas. 



My cabinet and cabinets of Mr. Pybas and Dr. Hartman. 

 Diam. -46, Length PO-j inch. 



Remarks. — Quite a number of specimens were sent by Mr. Pybas, which are all 

 very nearly alike. ' Some are darker than others. The angle on the periphery of the 

 whorls is obtuse, and in many specimens obsolete. The lower whorl is usually flat- 

 tened, sometimes impressed, quite making a channel. It is near to T. moriformi 

 herein described, but is not so turgid, is of "a darker color and has usually two dark 

 bands inside ; moriformi usually have a thin band but sometimes none. The length 

 of the aperture is not quite one-third the length of the shell. I name this after Mr. 

 B. Pybas, to whom I am indebted for it and many fine species from his vicinity. 



Trypanostoma subuLtEforme. PI. 36, fig. 116. 



Testa earinata, subulari, subtenui, cornea ; spira attenuato-coniea ; suturis valde impresses ; anfraetibus 

 denis, inferue planulatis, superne oarinatis ; apertura parva, subrhomboidea, iutus albida ; labro acuto, 

 sinuoso; columella parum incrassatS et contorts. 



74 



