60 PROCEEDINGS OF THE ACADEMY OF [1895. 



terebriformis. All those labelled PL nodocarinata in Heilprin's 

 Texan collection are terebriformis. 



The specimen herewith figured is large and well developed, while 

 Gabb's specimen was evidently small. The sutural crenulation dis- 

 appears on the larger whorls. Fine revolving striae are often seen on 

 the zone between the suture and carina. 



Localities. — Two miles above San Jose on the Rio Grande; Smith- 

 ville, Bastrop Co. ; Wheelock, Robertson Co. ; Mosley's Ferry, 

 Brazos River, Burleson Co. ; Cedar Creek, southeast corner of 

 Wheelock League, Robertson Co. ; Elm Creek, Lee Co. ; Alabama 

 Bluff, Trinity River, Houston Co. ; Hurricane Bayou, near Crockett, 

 Houston Co.; 2 miles east of Alto, Cherokee Co. ; 1 mile south of 

 Nevilles, Gonzales Co., Tex. 



Geological horizon. — Lower Claiborne Eocene. 



Types. — ? Academy of Natural Sciences of Philadelphia. 



PI. (Drillia) prosseri nov. sp. PI. 5, fig. 5. 



Specific characterization. — Size and general form as indicated by 

 the figure; whorls about 8; 1, 2, and sometimes 3, smooth; 4, 5, 

 6, 7 polished, a slightly raised band just below the suture, costse 

 large, obtuse, and somewhat obliquely set; body whorl with sub- 

 sutural band not well defined, humeral area slightly concave and 

 gently waved by the upward extension of the ribs, which are very 

 large below; beak slightly striate spirally. 



Localities. — Near Smithville, Bastrop Co.; Little Brazos River, 

 near iron bridge on Mosley's Ferry road; near Crockett, Houston 

 County. 



Geological horizon. — Lower Claiborne Eocene. 



Type. — Texas State Museum. 



This species is distinguished from huppertzi, kellogi, and varieties by 

 its polished surface, its more pointed apex, the length and obliquity 

 of the ribs, and its size. 



PI. (Drillia) kellogi Gabb. PI. 5, fig. 6. 



Turris kellogi Gabb, Jour. Ac. Nat. Sci. Phila., vol. 4, 1860, p. 379, pl. 67, 



fig. 10. 

 Surcula kellogi Con., Am. Jr. Concb., vol. 1, 1865, p. 18. 

 Surcula kelloggi Heilp., Proc. Ac. Nat. Sci. Phila., 1890, p. 394. 



The two type specimens in the Philadelphia Academy's collection 

 differ but little from the specimen herewith figured. The only point 

 worthy of note is that in those specimens the length of the aperture 



