• 195 



narrowed ; umbilicus closed by the callus of the columella ; surface 

 marked with fine lines of growth, and from fifty-six to sixty distinct, 

 revolving strias much narrower than the raised intervening spaces. 



Length, 0.90 inch ; width, 0.48. 



Ripley Group, Navarro County. 



Collected by Dr. S. S. Riddell. 



C. SECALiNA, (n. sp.) Shell small, subcylindrical, rounded at in- 

 ferior extremity, subtruncate above, length more than double the 

 width ; spire umbilicate, aperture narrow, widest below, slightly ex- 

 panded above, and prolonged a little above the summit of the body 

 of the shell ; umbilicus closed ; surface with very fine strise of growth, 

 and fine revolving strias, which are more distinct near the extremities 

 than the middle of the shell, spaces between irregular, but broader 

 than the stria?. 



This shell may be readily distinguished from the preceding by its 

 narrow, subcylindrical form, finer striae and smaller size. 



Ripley Group, Corsicana, Navarro County. 



C. MiNUSCULA, (n. sp.) Shell very small, thin, subovate, narrowly 

 rounded below, subtruncate above, length about double the width ; 

 spire umbilicate ; aperture narrow above, and expanding somewhat 

 rapidly below the middle ; outer lip thin, straight, nearly parallel with 

 the long axis of the shell, except at extremities, where it is curved ; 

 umbilicus very minute circular ; surface polished and marked with 

 very fine, feebly impressed lines of growth. 



Length of largest specimen in the State Collection, 0.18 inch ; 

 width, 0.10 ; greatest width of aperture, .04. 



Lower Cretaceous, Red River, Lamar County. 



Dr. G. G. Shumard collector. 



Genus Scalaria, Lamarck. 



S. FoRSHEYi^ (n. sp.) Shell conical, turreted ; spire elevated ; 

 volutions about seven, strongly rounded, and separated by a deeply 

 impressed suture ; body volution neatly rounded beneath ; aperture 

 ovate, slightly oblique to the long axis of the shell, a little longer than 

 wide ; columellar lip with a moderately strong callus, which almost 

 entirely closes the umbilicus ; surface elegantly ornamented with 

 prominent, rather sharp, longitudinal ribs, with very fine, filiform 

 lines between, crossed by fine, raised, revolving lines, and finer ones 

 in the intervals, giving to the surface a finely cancellated character. 

 The' number of ribs on the body volution is from twenty-two to 

 twenty-five. 



Length, 1,03 inch ; width, 0.50 ; length of aperture, 0.35 ; width 

 of same, 0.21. 



But one specimen of this very handsome species was found by Dr 



