﻿378 DESCRIPTIONS OF NEW SPECIES OF 



canal long, straight, narrow ; surface marked by about seven or eight prominent 

 longitudinal ribs, crossed on the shoulder of the whorl by three fine revolving lines, 

 and on the rest of the whorl by six or seven larger Jines, with occasional finer ones 

 alternating ; on the canal, the alternation of one or two fine lines with a larger one 

 appears to be constant. 



Dimensions. — Length 1*4 in., width of body whorl *65 in., length of aperture in- 

 cluding canal '8. 



Locality — Wheelock and Caldwell Co., Texas. Collections of the Smithsonian In- 

 stitution and the Academy and my collection. 



This species resembles F. Mortoni, Lea, but differs in the alternation of finer lines 

 with the larger ones and in being proportionally more slender- 



NEPTUNEA, Bolton. 



V N. enterogeamma. PI. 67, fig. 14. Fusiform, smooth; whorls six, those of the 

 spire rounded or obscurely angulated above the middle ; suture deep ; outer lip striate 

 internally. 



Dimensions. — Length - 9 in., width of body whorl - 5 in., length of aperture '6 in. 



Locality — Wheelock, Texas. Smithsonian collection. 



The striae on the inner side of the outer lip of the only sj)ecimen I have seen 

 consist of four prominent lines above the middle, and a few obsolete ones below. 

 There are traces of a few impressed lines on the beak. 



TURRIS, Humph. 

 (PLEUROTOMA, Montf.) 



-9- T. CRISTATA. PL 67, fig. 8. 



Pleurotoma cristata, Con., Jour. Acad. 1st ser. vol. i. pi. 11. 



Shell scalariform, whorls ten, carinated on the angle; mouth moderately wide, 

 inner lip covered with a thin coat of enamel, outer lip simple ; superior sinus 

 wide, rounded, one-twentieth of an inch deep, canal long, straight ; surface marked 

 by distinct lines of growth, crossed by numerous very fine revolving striae. 



Dimensions. — Length 1*3 in., length of mouth *6 in., width of body whorl *5 in. 



H- T. Moorei. PI. 67, fig. 9. Shell elongated fusiform, whorls nine or ten, strongly 

 carinate ; mouth narrow, long, half the length of the shell, inner lip covered with a 

 very delicate coat of enamel, so thin as to be visible only on a very well preserved speci- 

 men, outer lip thin, showing internally the marks of the larger ribs; surface marked 

 by about twenty-five revolving lines, smaller on the shoulder of the whorl (except 

 one large one at the upper edge, below the suture) than elsewhere ; in the largest 

 specimens, two or three of the principal ribs are compound, the rest are simple, near 

 the apex ; on the upper two of the principal revolving lines are small tubercles which 

 disappear in the succeeding whorls. 



