44 NEW FOSSIL SHELLS 



tub-tuberculatis ; costis longitudinalibus, tult-abliquit, magnis, rotundatit; anfractu ultimo rolundato; ban ttriif 

 parvit longitudinalibus; aperturd arctato-ovald; columelld redd, crassd, politd, superne valde incrassatd; sino pro- 

 fundo, lunato; canale brevi, inciso. 



Shell elongately fusiform, thick, glabrous, shining, imperforate, costate; spire attenuate, mamillate. smooth at the 

 apex; sutures flexnose, very small; whorls ten, angular near the middle, below convex and costate, above concave 

 and subtuberculate; costse longitudinal, somewhat oblique, large, rounded; last whorl rounded; base with small longi- 

 tudinal striae; mouth narrowly ovate; colvunella straight, thick, polished, very much incrassated above; sinus deep, 

 crescent-shaped: canal short, incised. 



Length 1.60. Breadth .50 of an inch. 



Remarks. The upper concave part of the whorls, near the suture, has a series of indis- 

 tinct tubercles, generally large and but very little elevated. The costse end a little below 

 the middle of the last whorl, and the base is smooth, with the exception of a few longi- 

 tudinal raised lines, and an indistinct oblique stria, which marks the growth of the canal. 

 Behind the columella is a small groove, caused by its elevation above the neighbouring 

 surface. The incrassation at the upper extremity of the columella forms a large callus, 

 at the mouth of the sinus, and almost fills it up. This gives it its peculiar lunate ap- 

 pearance. There is, properly speaking, no canal. The base of the mouth is deeply 

 incised, as in the genus Oliva, without cutting off the end of the columella as is usual in 

 this class of shells. 



This beautiful species agrees pretty well with the description and figure of P. limatula, 

 Conrad, (Journal of the Academy, Vol. VI.) but is larger, tuberculate near the suture, 

 and has the ribs more strongly developed. In addition to this, Mr. Conrad makes no 

 mention of the peculiar lunate sinus which characterizes the shell now before us. 



GENUS FASCIOLARIA. 

 F. PARVULA, PL. 37. FIG. 94. 



F. testa fusiformi, crassd, imperforatd, nitente, sulcatd, slriatd; spird elevatd, obtusd, ad apicem Itevi; suluris pro- 

 fundis, arctalis; anfractibus septem, sub-convexis; sulcis longitudinalibus, magnis, crebris; striis transuersis, parvis, 

 raris; anfractu ultimo rotundato; basi profunde striald; aperturd longd, arctatd, supra acute angulatd; columelld mul- 

 tiplicatd, canale longo, profundo, sub-curvato. 



Shell fusiform, thick, imperforate, shining, sulcate, striate; spire elevated, obtuse, smooth near the apex; sutures 

 deep, narrow; whorls seven, somewhat convex; sulci longitudinal, large, numerous; stria; transverse, small, few; last 

 whorl rounded; base deeply striate; mouth long, narrow, acutely angular above; columella with many folds; canal 

 long, deep, slightly curved. 



Length .20. Breadth .08 of an inch. 



Remarks. On the superior whorls there are three small transverse striate near the 

 upper suture, which cross the sulcations. The one nearest the suture is the largest and 

 deepest. On the last whorl the sulcations end about the middle, and then, after a narrow 

 interval, commence deep transverse stria? which increase as they approach the base The 

 folds on the columella are but continuations of these striae. The aperture is very narrow 

 and somewhat sinuous, gradually decreasing to the canal. The sutures are quite narrow 

 and deep. 



GENUS FUSUS. 

 F. PYGM^IUS, PL. 37. FTG. 95. 



F. testa ovatd, sub-fusiformi, crassd, leevi, politd; spird ovatd, valde obtusd. breviusculd; suturis linearibus; anfrac- 

 tibus r/iiatuor, planulatis; anfractu ultimo rotundato; basi leevi; aperturd sinuosd, arctatd; columflld angulalfi; canale 

 (or/o, longo. 



