GASTROPODA— TURRITELLIDJE. 729 



Family Turritellid^e Gray. 



CXXI. Turritella Lamarck. 



Shell with high turreted and acuminate spire, numerous, variously 

 spiraled whorls, separated by sutures of moderate depth and a 

 round, oval, or quadrangular aperture, with thin outer lip and no 

 plications. 



418. T. (Mesalia) seriatim-granulata (Roem). (Fig. 1058.) 



Comanchic. 



Large, slender, elongate, with numerous whorls flattened on the 

 side, each later projecting basally over the preceding. Alternating 

 spirals noded, varying in number ; the nodes low and round or 

 elongate, with spirals rather coarse and well separated. 



Fredericksburg of Texas ; in corresponding horizons of Cali- 

 fornia, Mexico, etc. 



419. T. (Mesalia) belviderei Cragin. Comanchic. 



Fig. 1058. Turritella serialim-gran- FlG. 1059. Turritella whitei. (After 



ulata. (After Gabb, Pal. Cal., I.) Stanton.) 



Differs from the preceding in its smaller size, finer granules, 

 which are prominent, numerous, and crowded, their greatest diam- 

 eter transverse or oblique to the abruptly elevated spirals. Lines 

 of growth show strong sinuosity in lip. 



Kiowa shales of Kansas. Common. 



420. T. kansasensis Meek. Comanchic. 

 Similar to the preceding, but the spirals without nodes or gran- 

 ulations. 



Kiowa shales of Kansas, etc. 



421. T. whitei Stanton. (Fig. 1059.) Cretacic. 



