CARBONIFEROUS CEPHALOPODS. 

 Endolobus gibbosus, n. s. 



353 



Loc. Colorado River, San Saba County, near Bend. Texas. 

 Coll. Nat. Museum. 

 Figs. 55, 56, natural size. 



This is a good sized, smooth shelled, nautilian form, the largest specimen 

 not less than 130 mm. in diameter. The shell has broad, depressed whorls, 



Fig. 55. 



Pig. 56. 

 narrow and very deep umbilici. The outer whorls in adults cover in about 

 one-half of the next inner whorl. The line of involution is separated from 



