194 



Green Sand or Cenomanien. In the United States it is said to be most 

 frequently met with in the Niobrara Division, but it is also sometimes 

 found in the Fort Ben ton Group. 



2. FROM THE COARSE CONGLOMERATES, OR SUBDIVISION B. OF DR. G. M. 

 DAWSON'S REPORT. 



The only fossil yet obtained from these conglomerates is a worn 

 fragment of the guard of a Belemnite which it is impossible to deter- 

 mine specifically. 



3. FROM THE LOWER SHALES AND SANDSTONES, OR SUBDIVISION C. OF 

 DR. G. M. DAWSON'S REPORT. 



CEPHALOPODA. 



BELEMNITES DENSUS, Meek and Hayden. 

 Plate 22, fig. 1. 



Belemnites denaus, Meek & Hayden. 1858. Proceedings of the Academy of 



Natural Sciences of Philadelphia, p. 58, 

 and do. for 1860, p. 418. 

 1865. Paleontology of the Upper Missouri, 

 p. 126, pi. 4, figs. 10 a, b, c, and PL 5, 

 figs. 1 d, e,f, ccet. exclus. 



Meek. 1876. Simpson's Report on Explorations 

 across the Great Basin of Utah, Rep. 

 on the Palseontological colections, p. 

 358, pi. 3, figs. 4 a, b. 



Belemnites, Sp. Undt. This volume, p. 11, woodcut fig. 1, and 



pi. 1, figs. 1, la, Ib and lc. 



Guard comparatively short and thick, increasing rapidly in breadth 

 from the point to a distance of about one-half or three-quarters of an 



