42 FOSSILS FROM SOUTHERN UNITED STATES— D ALL. 



Vf)L. XVIII. 



but uiidescribed form from "Vicksburg, complete the list of our kuown 

 Eocene cones. C. gyratus, Morton, and C. claihornensiSj Lea, are uurec 

 ognizable, and should be dropped. C. suhsavriflens does not appear to 

 differ from C. sauridens, Conrad. C. gr(tno2)sis, deGregorio, appears to 

 be identical Avith C. protractus, Meyer, but the type of C. granopsis is 

 only 4 mm, long-, and it may be a young C. sauridens. C. improridns, 

 de Gregorio, from an unmentioned (American?) locality, is not like 

 anything known from Claiborne in American collections. 



Only three species of cones are yet known Irom the Chesapeake 

 Miocene: C. adversarins, Conrad; C. diluvianns, Green, and C. mary- 

 landicHs, Green, The original locality of the latter is not known, and 

 it has not recently been collected in Maryland, but occurs in Duplin 

 County, North Carolina, and has by some accident been figured by 

 Tuomey and Holmes, under the name of C. diluvianns, from South 

 Carolina. 



The cones of the old Miocene of Florida do not include any of the 

 Antillean species described from the ecjuivalent horizon, which is rather 

 a surprise, but we find the three forms here described, with several 

 well-marked varieties. 



1 





CONUS CHIPOLANUS, new species. 



Shell double-conic, with a rather elevated spire of nine normal and 

 about three Incid nuclear whorls; profile of the spire somewhat con- 

 cave, turrited shoulder of the whorls sharply keeled, concave between 

 the keel and the suture, without spiral grooving, but showing faint 

 microscopic spiral scratches, the prominent sculpture of this area being 

 the delicately nrched lines of the anal fasciole, which are sometimes 

 very conspicuous; the keel is wholly without nodules; sides in front of 

 the keel straight, slightly concave toward the canal, smooth, except 

 for incremental lines, polished anteriorly, with about nine sharp, chan- 

 neled spiral grooves, besides some striations on the canal; the grooves 

 are separated by wider interspaces and crossed by numerous elevated 

 lines of growth^ which only appear in the channels; each channel in 

 the fully adult shell has a spiral row of faint, round tubercles close to 

 its anterior margin; in the young the grooves sometimes cover the 

 Whole shell before the keel, and the nodules are often absent; in the 

 adult the grooves cover somewhat less fhan half the whorl, while on 

 the smooth part traces of five narrow, revolving color bajids are some 

 times visible, with wider interspaces; anal notch only moderately deep; 

 outer lip thin, only moderately arched ; aperture narrow, with nearly 

 parallel sides; the pillar straight, thin, slightly twisted. Longit'iide of 

 shell, 32; of spire, 7.5; maximum diameter, 15.5 imn. 



^f,/,,7a/._Chipola beds (2213), Chipola River, Florida. 



Types.— '^o. 113985, U. S. K M.; and in the collection of Mr. Aldrich. 



This species recalls C. interstinctits, Guppy, of the Haitian Miocene, 

 but is a smaller, more slender, and more delicate shell, without any 

 grooving in the sutural fasciole. It is more nearly related to G. mary- 



