13 BuivLKTIN II 12 



Heilprins' oj'iginal descriptio7i. — "Shell fusiform, elevated, of 

 about eight volutions, the whorls considerably contradled above 

 the shoulder; whorls ornamented with a double series of nodes, 

 the lower much the most strongly developed, which gives to the 

 upper portion of the spire a moniliform appearance; surface of 

 entire shell traversed by fine revolving lines, which become 

 more distant, very prominent, and alternate on the median 

 portion of the body -whorl; aperture about the length of spire; 

 the relative position of the upper and lower nodes correspond 

 to the sinuous lines of growth. 



"Length, i inch. Cave branch, Clarke Co., Ala." 

 In rare instances the costation of the body whorl resembles 

 that of mediavia, or childre?ii. 



Localities. — Ai.A. : As above, and especially Woods bluff. 

 Type. — 

 Specimen figured. — Woods bluff; Paleont. Mus., Cornell Univ. 



Pleurotoma denticula, var., PI. i, fig- 21, 22. 



Syn. P. denticula Edw., Paleont. Soc. Lond., vol. xxi, p. 2S6, pi. 30, fig. 



7, a-h, i860. 

 ? P. denticula Bast., Descr. Geol. du Bass. Tert. Sud-ouest de la 



France, p. 63, pi. 3, fig. 12, 1825. — Fide Edw. 

 P. alternata Con., Foss. Sh. Tert. Form., p. 46, 1833. 2d ed. p. 



50, pi. 17, fig. 13, 1835. 

 P. c/iildretiih&a., Cont. to Geol. p. 137, pi. 4, fig. 132, 1833. 

 P. acutirostra Con., Foss. Sh. Tert. Form., p. 52, pi. 17, fig. 21, 



1835. 

 P. plebeia Dixon, Geol. Sussex, p. 184, pi. 6, fig. 23, 1850. 

 P. denticula Heilp., Proc. Ac. Nat. Sci. Phila., 1879, p. 214, p. 13, 



fig. 10. 

 P. denticula Meyer, Proc. Ac. Nat. Sci. Phila., 1884, p. 106. 



Not having Basterot's original description, or specimens from 

 his type localit}'' it is impossible at present to say from personal 

 observation whether our specimens can be referred to his species 

 or not. On the other hand it seems quite safe to say that ours 

 and some of the varieties referred to denticula by Edwards from 

 the English Eocene are the same. My foreign specimens are 

 from the Barton beds of southern England and Alum bay, Isle 

 of Wight, and are considerably shorter proportionally than are 

 the American, but on the whole the differences seem to be of 



