498 University of Kansas Geological Survey. 



Fragments of the shafts of Tusoteuthis longus or allied forms are 

 abundant in the Ornithostoma beds, but complete specimens 

 are extremely rare. 



AETHROPODA. 



Strainentum. 



Stramentum Logan, 1897, Kans. Univ. Quart., vi, p. 198. 



Capitulum composed of eight or nine plates ; plates of the 

 peduncle narrow, with the ends turned down, presenting a 

 thatched appearance ; plates each with a groove running longi- 

 tudinally. The two known species of this genus are evidently 

 from a higher horizon than those of Squama, coming from the 

 yellow chalk, the same beds which contain the toothed birds. 



Stramentum JiaivortJiii Williston. Plate cxi. 



Pollicipes haiuorthii Williston, 1896, Univ. Geol. Surv., vol. n, p. 213, pi. 



xxxvi. 

 Stramentum haworthii Logan, 1897, Kans. Univ. Quart., vol. vi, No. 1, Oct., 



series A, p. 188. 



Description : Capitulum small, composed of nine plates, viz. : 

 Carina, scuta (2), terga (2), lateralia (4) ; height, five mm. ; 

 breadth, eight mm. Terga triangular, with the apex point- 

 ing toward the base of the capitulum ; surface marked by 

 striations, moderately indented in the type specimen ; height, 

 ten mm. ; greatest breadth, four mm. Superior laterals trian- 

 gular, with apex rounded ; convex, overlapping scuta in the 

 single specimen ; height, nine mm. ; breadth at base, thirteen 

 mm. Scuta shorter than the superior laterals, their edges 

 slightly rounded ; moderately convex ; triangular, with the 

 apex truncated by a line parallel with the base, which is inclined 

 at an angle of thirty degrees toward the base of the capitulum ; 

 height, ten mm. ; breadth at base, two mm. Carina long, nar- 

 row, rounded; height, ten mm.; breadth at base, two mm. 

 Peduncle composed of nine rows of plates ; plates narrow, one 

 mm. in breadth and four mm. in length, with about thirty 

 plates in each row ; plates turned downward at the end, 

 grooved along central line. Height of specimen, twenty-seven 

 mm. ; height of capitulum, ten mm. ; height of peduncle, seven- 



