252 PYRAMIDELLID.E. 



inclivicliials, with which the majority of cabinets are alone 

 furnished, exliibit, for the most part, a vitreous surface of 

 uniform white. The spire, which is composed of seven or 

 eight vohitions (the broken apices of our adult examples 

 forbid our positively specifying the exact mimber), seems to 

 be between three and four times as long as the body. 

 The whorls, which are rather high, and of moderately fest 

 longitudinal increase, are more or less flattened, and angu- 

 lately jut out above, beneath the narrow, yet distinct, and 

 little slanting suture. Numerous, yet not crowded longi- 

 tudinal ribs (we counted twenty on the penult turn of one 

 of our specimens) that are straight, narrow, and acutely 

 prominent, traverse the entire shell (a few of the earlier 

 coils excepted) and oftentimes indent the sutural line by 

 projecting beyond it. Their broad intervals are encircled 

 with several raised lines, that become stronger and more 

 densely disposed upon the somewhat flattened surface of the 

 abrupt basal declination of the body whorl. The mouth, 

 which does not occupy a fourth of the entire length, is 

 subquadrate, and not so very much longer than broad ; 

 it is neither acutely contracted above, nor much rounded 

 below. The acute and simple outer lip is not dilated ; 

 it is straightish at first, and then curving abruptly, yet 

 with little convexity, unites itself to the bottom of the 

 straight pillar lip, which latter is very narrowly, if at all, 

 reflected, and forms a very wide angle with the straightish, 

 and but little slanting base of the preceding volution. 

 There is no distinct axial perforation, but occasionally a 

 slight crevice behind the pillar. Our largest example mea- 

 sured three lines and a half in length, and a line and a 

 quarter across at the base. 



The animal is of a brownish madder hue, and in that 

 respect strikingly differs from its British congeners. 



