22 PROCEEDINGS OF THE ACADEMY OF 



Cimoliasaurus magnus. Cope: Pr. Bost. Soc. Nat. Hist. 1869, 266. 

 Cimoliasaurus retustus. Cope: Synopsis Ext. Bat. Rept., &c, 1869, 57. 

 Cretaceous of Alabama. 



2. DlSCOSADRCS GRANDIS. 



Brimosaurus grandis. Leidy : Pr. Ac. Nat. Sc. 1854, 72, pi. i, figs. 1-3. 

 Cimoliasaurus grandis. Cope: Pr. Bost. Soc. Nat. Hist. 1869, 266; Synopsis 

 Ext. Batrachia, Reptilia, &c. 1869, 57. 

 Cretaceous of Arkansas. 



3. DlSCOSAURUS CARINATUS. 



Elasmosaurus plalyurus and Discosaurus carinatus. Cope: LeConte's Notes 

 on the Geology &c. Union Pacific Railway, 1868, 68. 



Elasmosaurus p/atgurus. Cope: Pr. Ac. Nat. Sc. 1868, 92; Pr. Bost. Soc. 

 Nat. Hist. 1869, 266; Synopsis Ext. Batr. Rept. 1869, 46. 

 Cretaceous of Kansas. 



4. Discosaurus magnus. 



Cimoliasaurus magnus. Leidy: Pr. Ac. Nat. Sc. 1851,325; 1854, 72, pi. ii, 

 figs. 4-6; Cret. Rept. U. S. 1865, 25, pi. v, figs. 13-19, pi. vi. Cope: 

 Pr. Bost. Soc. Nat. Hist. 1869, 266 ; Synopsis Ext. Batr. Rept. 1869, 57. 



Discosaurus vStustus in part? Leidy: Cret. Rept. U. S. 1865, 24, pi. v, figs. 

 1-3, 7-9. 

 Cretaceous of New Jersey. 



5. Discosaurus planior. 



Discosaurus vetustus in part. Leidy : Cret. Rept. U. S. 1865, 23, pi. v, figs. 

 10-12. 

 Lower cretaceous of Mississippi. 



6. Discosaurus orientalis. 



Elasmosaurus orientalis. Cope: Pr. Bost. Soc. Nat. Hist. 1869, 266; Synop- 

 sis Ext. Batr. Rept. 1869, 54. 

 Lower cretaceous of New Jersey. 



In the cervicals of Discosaurus, so far as can be ascertained by the material 

 at command, there appears to be no subdivision of the articular process for 

 the riblets, as in Plesiosaurus. In the latter the chevron bones consist of 

 lateral halves, ununited by osseous tissue. In the skeleton of the Kansas sau- 

 rian, intervening between two of the caudals, there is a bone which looks as 

 if it might be an inverted Y-shaped chevron, with one arm broken off. The 

 ~pine broken at the end is about four inches long. The remaining arm, broken 

 away at the articular end, is about three inches long. 



On favorable report of the Committees, the following papers were 

 ordered to be printed : 



Descriptions of new Species and Genera of Fossils from the Palaeozoic rocks 



of the Western States. 



BY F. B. MEEK AND A. H. WORTHEN, 



Of the Illinois State Geological Survey. 



FORAMINIFERA? 



Receptaculites formosus, M. and W. 



Body obovate, the breadth being about three-fourths the height, and the 

 widest point a little above the middle ; upper end rounded, and without any 

 umbilicoid concavity or opening, unless it may be a very small one ; sides 

 gndually tapering with a slight convexity from a little above the middle, to 

 an apparently moderate sized base of attachment. Cell openings or depres- 



[April, 



