INSTITUTE OF SCIEN'CE, PHILADELPHIA. 29 



Several more or less broken pieces and defective specimens agreeing with 

 those named servata by Conrad were obtained from the silex-beds. 



Genus DRILLIA Gray. 



Section Cymatosyrinx Dall. 



Drillia lunata Lea. 



Pleuroioma lunatunt Lea, Trans. Am. Phil. Soc, new ser. ix. p. 269, pi. 37, fig. 93, 1843. 

 Drillia lunata Conrad, Proc. Acad. Nat. Sci. Phila., 1862, p. 562. 

 Drillia {Cymatosyrinx) lunata Dall, Rep. Blake Gastr., p. 95, 1889. 



Miocene of Petersburg, Virginia and Chipola River, West Florida ; Plio- 

 cene of the Carolinas, Caloosahatchie beds of Florida. 



This fine species is not rare in the Caloosahatchie marls. It does not ap- 

 pear to have survived to the present day, but is represented by D. cBpynota, 

 D. Moseri, and other allied but distinct species. In the Floridian Miocene 

 other species of the same type existed, but smaller, of which the following 

 will serve as an example. 



Drillia Newmani n. s. 

 Plate 4, figures 5, 5 a. 



Shell small, seven-whorled, with a small, smooth nucleus of two whorls ; 

 the remainder is transversely sculptured by (on the last whorl eleven) very 

 uniform, rounded, moderately elevated, slightly sigmoid ribs or waves, which 

 are most prominent on or just behind the periphery of the whorls, which do 

 not cross the anal fasciole and on the base become gradually obsolete ; the 

 spiral sculpture is hardly visible except on the last whorl, and consists of fine 

 rounded threads, most evident on the base and canal, and fading as they re- 

 cede from the base ; anal fasciole smooth, rather wide, unsculptured except by 

 incremental lines ; suture appressed over the ribs of the preceding whorl, and 

 thus rendered slightly wavy ; last rib varicoid ; canal short, wide ; outer lip 

 not internally lirate ; inner lip concave, simple, with a moderate callus. Max. 

 Ion. of shell 12.5 ; max. lat. 4.8 mm. 



Ballast Point silex-beds, Tampa Bay, Florida ; Newman. 



This species may best be compared with D. czpynota (Rep. Blake Gast., 

 pi. xxxvi. fig. 10), than which the shell is proportionally more slender, with 

 smaller, shorter and less prominent ribs, narrower and less excavated anal 

 fasciole, and smaller nucleus. It is also a smaller shell than the sinall varieties 

 of D. CBpynota and much less stout and swollen in appearance. 



Drillia sepynota Dall var. acila. 

 Drillia {Cymatosyrinx) cFpynoia Dall, Rep. Blake Gastr., p. 96, pi. xxxvi. fig. 10, 1889. 



Caloosahatchie beds. Recent off the coast of the Carolinas in 25 to 120 

 fathoms. 



The fossils differ from the recent shells in having the spire slightly more 

 drawn out and acute, the anal fasciole consequently wider and more marked 



