Weno and Pawpaiv Formations 143 



The present species is nearly straight-sided and is slightly angulated, 

 while in T. bravoensis Bose 1 the middle rows of tubercles form a conspicu- 

 ous angular projection on each volution. The number of rows of tubercles 

 is greater than in Bb'se's species and the tubercles are more crowded in 

 the rows. The conspicuous transverse striated growth lines of his species 

 are absent in our material. T. pkmilateras Conrad 2 is somewhat similar 

 in form to our species, but has a prominent alternation of tuberculate and 

 smooth spiral ridges, while in our species the intermediate lines are tuber- 

 culate and do not approach the main ridges in thickness. T. budaensis 

 Shattuck 3 has the rows of tubercles diverse, the second row from the suture 

 being most prominent, and the form is more angulated than in our species. 

 T. worthensis is at once separated by its strong tubercles from the faintly 

 tuberculate or granulated species, T. seriatim-granulata Roemer 4 (Freder- 

 icksburg, Lower Washita), T. marnochi White, 5 T. leonensis Conrad (Fred- 

 ericksburg) 6 and T. denisonensis Cragin 7 (Mainstreet, Grayson). 



Ellisor 8 has described several species of TurriteUa of which only T. man- 

 chacensis (Buda) and T. washitensis (Buda> seem to approach the present 

 species in ornamentation or form. 



CINULIA WASHITAENSIS n. .p. 

 PL 10, figs. 33-37 



1920: Cinulia sp. Winton and Adkins, Univ. Texas Bull. 1931, p. 66. 



MEASUREMENTS : 



Total height 15 mm. 



Total breadth . 14 mm. 



Body whorl, excluding lip, height 10 mm. 



Body whorl, excluding lip, breadth 10 mm. 



Breadth of lip 4 mm. 



HORIZON: Weno blue shale and clay-ironstone layers, middle and 

 upper portions of the formation, especially in the Red River region. 

 LOCALITY : 601, pit of brickyards, one and three-fourths miles south- 



ifiose, Inst. Geol. Mex., Bol. 25, p. 149, pi. 31, figs. 8-9; pi. 32, figs. 1-2, 1910. 



'Conrad, Mex. Bdry. Surv., Vol. 1, Pt. II, p. 158, pi. 14, figs, la-b, 1857. 



"Shattuck, U. S. G. S. Bull. 205, p. 31, pi. XIX, figs. 4-6, 1902. 



4 Roemer, Kr. Texas, p. 39, pi. 4, figs. 12a-b, 1852. 



'White, U. S. G. and G. S. Terr., llth Ann. Kept., pp. 314-315, pi. 7, figs. 5a-b, 1879. 



Conrad, Mex. Bdry. Surv., Vol. 1, Pt. II, p. 165, pi. 21, figs. 7a-b, 1857. 



'Cragin, Colo. Coll. Stud., 5, p. 65, 1895. 



"Ellisor, Univ. Texas Bull. 1840, 1920. 



