NATURAL SCIENCES OF PHILADELPHIA. 5 



than in Dermatemys, and extend in advance of the suture between the hvo- 

 and hypo- sternal plates. 



The name of Baptemys Wyomingensis is proposed for the turtle. When 

 complete the carapace has measured about one foot and a half in length by 

 one foot in breadth. The sternum has measured about one fool in length ; 

 the depth of its pedicles 4 inches, their breadtli 3 inches ; the Length of the 

 posterior extremity 4 inches, its breadth at base 4.! inches. 



It is probable that the specimen, from the same locality, upon which was 

 characterized the Emys Wyomingensis (Pr. A. N. S., 1869, 60,) belongs to the 

 same animal. 



5. Among a multitude of fragments of turtle shells obtained by Mr. J. Van 

 A. Carter from the same formation and locality in which the preceding speci- 

 men was found, there are many apparently of* the Trionyx guttatut (Pr. A. N. 

 S., 18G9, 66.) Some of the fragments pertain to an emydoid differing from 

 the preceding, but they are too imperfect to ascertain the exact generic char- 

 acters. In this species both the vertebral plates and scutes are proportion- 

 ately much wider in relation with their breadth than in Baptemys. The 

 scutes mentioned are deeply impressed, whereas in the latter their boundaries 

 are scarcely traceable. The series of vertebral plates from the first to the 

 eighth, inclusive, measure eight and a half inches. The fore part of the 

 sternum is truncate as in Dermatemys, but not so much produced. For the 

 species the name of Emys Stevensonianus is proposed, in honor of James 

 Stevenson, the companion and able assistant of Prof. Hayden in his geological 

 explorations of the west. 



Prof. 0. C. Marsh, of Yale College, exhibited a series of specimens of the 

 remains of birds from the cretaceous and tertiary of the United States, which 

 showed that this class was well represented during these periods, although 

 no species have yet been described from these formations in this country, and 

 none indeed from older rocks, since it now appears to be well established 

 that the bird-like foot-prints in the Connecticut Valley were made by Dinosau- 

 rian reptiles. Among the species shown were the remains of at least five species 

 of cretaceous birds, although but one, or possibly two, species have hitherto 

 been described from strata of this age in Europe. The present cretaceous 

 specimens were all found in the green sand of New Jersey, and with one ex- 

 ception in the middle marl bed. They are all mineralized, and in the same 

 state of preservation as the bones of extinct reptiles found with them in these 

 deposits, and hence are readily distinguished from the remains of recent birds 

 which have occasionally been found near the surface in the marl excavations 

 of New Jersey. 



The most interesting of the specimens exhibited was the distal portion of 

 a large and robust tibia, apparently of a swimming bird, about the size of a 

 goose ; it was found in the green sand at Birmingham, New Jersey, in the pits 

 of the Pemberton Marl Company. For this new genus and species Prof. 

 Marsh proposed the name Laornis Edvardsianus. Two species of small wad- 

 ing birds, which appear to have been allied to the Curlews, were also repre- 

 sented, each by the distal end of a tibia, and probably by some other less 

 characteristic portions. The larger of these species, which was found in the 

 green sand of the middle marl bed at Hornerstown, New Jersey, was named 

 Falmotringa littoralis, the smaller species, which was called Palwotringa vetus, was 

 founded on the specimen mentioned by Dr. Morton in his Synopsis of cretaceous 

 fossils (p. 32), which has since, however, been generally regarded as a recent 

 species. The specimen was found in the lowest marl bed at Arneytown, X. 

 J., and is now in the collection of the Academy. Portions of the humeri of 

 two small and closely allied species, apparently related to the Rail family, 

 were part of the series shown. They were found deep in the green sand of 

 the middle marl bed, near Hornerstown, N. J., in the pits of the Cream Eti 

 Marl Company. For the species thus represented the names Telmatornis prucut 

 and Telmatornis affinis were proposed. 



1870.] 



