INSTITUTE OF SCIENCE, PHILADELPHIA. 69 



the latter), and the absence of the numerous lines on the shoulders. In 

 the first of these characters, as well as in the smaller number of revolving 

 lines, it also differs from the closely resembling Fusus Henekeni of Sow- 

 erby, a common Miocene fossil of the West Indies. 



Fasciolaria scalarina, nov. sp. Fig. 2. 



Shell sub-fusiform, of about ten volutions, longitudinally ribbed or 

 plicated ; spire elevated, nearly one-third the length of shell ; whorls 

 convex, those of the spire angulated at about the middle, crossed by 

 numerous elevated, and more or less rounded, revolving lines, from ten 

 to fourteen on each of the more prominent whorls ; central line most 

 prominent, forming the median angulation or carination ; interstitial finer 

 lines present at irregular intervals. 



Body-whorl with about 15-20 ribs or plicae, which, as a rule are 

 less prominently angulated than those of the spire, making the shell 

 appear more regularly convex ; revolving lines somewhat over thirty, a 

 limited number of which are interstitial ; aperture about one-half the 

 length of shell, or somewhat over, produced anteriorly into a broad 

 canal of moderate length ; outer lip prominently lined on the inside ; colu- 

 mella with two very oblique folds, the lower of which is practically obsolete. 



Length, 6.5 ; width, 2.5 inches. 



In the banks of the Caloosahatchie, below Fort Thompson. 



The only American Fasciolaria to which this species bears any 

 great resemblance is F. Spairowi of Emmons (North Carolina Geol. 

 Surv., 1858, p. 253, fig. 1 15), from the Miocene of North Carolina, or at 

 any rate, a fossil from that State which has been identified as such by 

 Conrad. I find in the collections of the Academy of Natural Sciences 

 of Philadelphia two specimens of a large Fasciolaria marked by Conrad 

 "F. Sparrmvi, Emmons, N. C.," and have every reason to believe that the 

 forms so identified are Emmons' species, although differing widely from 

 the description given by that geologist. This description is, however, 

 very vague, and manifestly erroneous in several of its details, so that little 

 satisfaction can be derived from it ; Emmons' figure more nearly resembles 

 the fossil in question, and this fact, combined with the knowledge that 

 Conrad had access to the collections of the Carolina survey, lead me to 

 assume the correctness of the latter paleontologist's identification. 



From the Fasciolaria Spamm'i, recognized as such, the Florida fossil 

 differs in the lesser convexity, and more pronounced median angulation 

 of the whorls of the spire, the greater number and prominence of the 

 longitudinal ribs, which are largely obsolete on the body-whorl of F. 

 Sparrowi, the greater relative elevation of the spire, and the absence of 

 the regular alternation of coarse and fine revolving lines seen in the 

 Carolina species. 



