INSTITUTE OF SCIENCE, PHILADELPHIA. 3I3 



and grow feebler up the spire, while in T. chipolana they are, if anything, 

 stronger. The latter is more .slender, with rounder whorls and no tendency 

 to discontinuity at the suture. 



Turritella eti"wanensis Tuomey and Holmes. 



1 erebellmn etiwanensis T. and H., Pleioc. Fos. S. Car., p. 122, pi. 26, figs. 9, 10, 1857 ; Em- 

 mons, Geol. Rep. N. Car., p. 270, 1858. 



Newer Miocene of Goose Creek and Peedee River, S. C, Holmes; of 

 Cape Fear River, Johnson; abundant in the marls of Edgecombe Co.,N. C, 

 Emmons. 



This form exhibits so much affinity to T. variabilis that I feel confident 

 they may eventually be united. 



Turritella striata Holmesii Dall. 



Terebellum strialum T. and H., Pleioc. Fos. S. Car., p. 123, pi. 26, fig. 7, 1S57. 



T. Burdeni Emmons, Geol. Rep. N. Car., p. 270, fig. 163, 185S; notof Tuomey and Holmes. 



Newer Miocene of Darlington, S. C, Holmes ; of Cape Fear River, N. 

 C, at Mrs. Purdy's marl-bed, Johnson. 



This appears to be a good species, but the name striata seems to have 

 been used in the genus by Lea and others before 1857. 



Turritella Burdeni Tuomey and Holmes. 

 Terebellum BtirdetiiT. and H., Pleioc. Fos. S. Car., p. 122, pi. 26, fig. 11, 1S57 ; notof Em- 

 mons. 



Newer Miocene of the Peedee River, S. C, Holmes ; of Cape Fear River, 

 N. C, at Robinson's, Johnson. 



The sculpture of this species is absolutely identical with that of some 

 forms of T. apicalis Heilprin, but the single specimen I have seen and the 

 figure of Tuomey and Holmes are broader at the base than in the Florida 

 species. Whether this is a constant character must be determined by more 

 abundant material and careful comparisons. 



Turritella subgrundifera n. s. 

 Plate 22, figure 23. 



Rather abundant in the older Miocene of the Chipola beds, Calhoun 

 County, Florida, and represented by molds in the Sopchoppy limestone of 

 the same age, from Wakulla County, Florida, Dall and Burns. 



Shell thin, acute, with twenty-four sharply carinated sculptured whorls 

 and a nucleus of two smooth, swollen whorls, of which the first is set ob- 

 liquely to the axis of the adult shell ; transverse sculpture only of lines of 

 growth, which are not prominent and rarely undulate even the finest of the 

 spirals ; the periphery of the whorl is near the suture in front, and is orna- 

 mented with an extremely sharp keel, which overhangs, like eaves, the succeed- 



