144 University of Texas Bulletin 



east of Gainesville, Texas (type locality) ; 604, cut of St. Louis and San 

 Francisco Railway, three-fourths mile north of Union Station, Denison, 

 Texas. Occasional in Cooke and Grayson counties, Texas. About 25 in- 

 dividuals found. 



DESCRIPTION : Shell of medium size, sub-globose, total outline sub- 

 elliptical; four volutions, of which the last is much the largest and occu- 

 pies two-thirds the height of the shell. Surface ornamented with evenly 

 rounded equal revolving lines, about 25 on the last volution. Between 

 the lines are concave depressions each about one and one-half times the 

 width of a line. These contain numerous equally spaced vertical cross 

 striations, which run perpendicular to the depressions and to the adja- 

 cent revolving lines. Aperture elongate, rounded-cuneate, narrowed at 

 the top and enlarged at the bottom. Outer lip much thickened and rounded, 

 elongate, extending the length of the two last volutions in the type (slightly 

 shorter in other individuals), and bearing on the inner margin about 14 

 nearly equal blunt tubercles in two equal groups. The inner lip is flat 

 and expanded and bears on its apertural margin three elevated spiral folds 

 or laminae which project into the aperture ; these are thickened and rounded 

 at their free margins ; the basal two lie almost horizontal while the upper 

 one is directed somewhat downwards and is concealed underneath the 

 jnner lip. Viewed from outside the outer lip is very broad and thick- 

 ened and bears about seven irregular coarse overlapping laminae. 



This species resembles Cinulia tarrantensis Cragin 1 of the Goodland 

 limestone near Fort Worth, but differs in several respects. C. tarrantensis 

 is poorly described and figured and some of its critical points are inde- 

 terminate, no further material having been discovered from the type 

 locality, Goodland limestone near Benbrook, Tarrant County, Texas. The 

 type apparently is lost, or at least it is not in the other Bumble Survey 

 material at Austin. Cinulia is extremely rare in the Goodland limestone 

 of the Fort Worth region. The species appears to differ from C. wash- 

 itaensis in having a narrow and much less imbricate lip and in having 

 the spire lower in proportion to the length of the lip. In Cragin's species 

 the lip does hot seem to reach the top of the body whorl, while in the type 

 of our species it is more elongate, extending the whole length of the term- 

 inal and next adjacent whorls instead of only three-fourths of the term- 

 inal whorl. In some other individuals it is lower, but never so low as in 

 C. tarrantensis. The figure of C. tarrantensis shows the angulation of 

 the turns above the body whorl to be pronounced, while in our species 

 also differs in numerous details. The outer lip is broader in proportion 



Cragin, Geol. Surv. Texas, 4th Ann. Kept., p. 223, pi. XLII, fig. 1. 



