358 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



Gardner from the Upper Cretaceous of the San Juan Basin of New 

 Mexico (Hay, O. P., Proc. U. S. Nat. Mus., vol. 38, pp. 307-326, 1910). 

 A complete crocodile skull and lower jaws described by Charles W. 

 Gilmore as the type of Leidyosuchus sternbergi (Proc. U. S. Nat. Mus., 

 vol. 38, pp. 485-502, pis. 23-29, 1910) from the Lance, Upper Cretace- 

 ous, and a complete skull and neck of Glidastes velox from the Nio- 

 brara formation, Upper Cretaceous of Kansas were purchased from 

 Charles H. Sternberg. A plaster cast of the rhynchocephalian reptile 

 Homoeosaums maximiliam was purchased. 



1911 



A third addition to the collection of Fort Union mammals was made 

 by purchase of 55 specimens from A. C. Silberling. A second con- 

 signment of 20 mammal and reptile specimens from the American 

 Museum of Natural History completed the exchange for the Cope 

 materials ; of the specimens transmitted a partial skeleton of Dimetro- 

 don inohius and a skull of Eryops from the Permian of Texas are 

 worthy of special mention. Plaster casts of the skull of G amptosawrus 

 nanv^ and of the e^jidermis of a hadrosaurian "mummy" constituted a 

 second exchange with this same institution. A molar tooth of Elephas 

 columhi from Placita, N. Mex., was presented by E. D. Cope (Proc. 

 Acad. Nat. Sci. Philadelphia, 1874, p. 221). 



1912 



Type and figured specimens described by E. D. Cope (Proc. Acad. 

 Nat. Sci. Philadelphia, vol. 21, p. 192, 1869) constituted the outstand- 

 ing accession of this year. The types were of Polydectes hiturgidus, 

 Hadrosaurus tripos^ and HypHibema crassicaiida., all from the Upper 

 Cretaceous of North Carolina. They were deposited by the North 

 Carolina Department of Agriculture, through H. H. Brimley, curator 

 of the State Museum. A unique type specimen consisting of the jaws 

 and teeth of the extinct shark Edestus 7n'u'V8 (Hay, O. P., Proc. U. S. 

 Nat. Mus., vol. 42, pp. 31-38, 1912) from the Carboniferous of Iowa 

 was presented by the Smitlisonian Institution. 



A composite rhinoceros skeleton {Diceratherium cooki), now 

 mounted and on exhibition, from the Lower Miocene of Nebraska 

 was received in exchange with the Carnegie Museum of Pittsburgh. 

 A plaster cast of the hind leg and foot of Diplodocus caimegii was 

 received in exchange with this same institution. A turtle, Stylemys 

 nehrascensis^ from the Oligocene of Wyoming was purchased from 

 Charles H. Sternberg. A lower right molar of Elephas columhi 

 from Tama, Iowa, was presented by Fred Herschel (Hay, O. P., 

 Iowa Geol. Surv., vol. 23, p. 447, 1912). 



