FOSSIL REMAINS. 475 



lower jaw of a young Seal, containing a canine and four molar 

 teeth, with an impression of a fifth. It enables us now to affirm 

 that the species is Phoca Groenlandica (Pagophilus Groenlandi- 

 cus of Gray's Catalogue), the common Greenland Seal, and it is 

 of such size that it may have belonged to the same individual 

 which furnished the bones described in 1856, or at least an 

 animal of the same species and of similar age." 



IY. Extinct Species. Another reference to fossil remains ap- 

 parently referable to a Seal is $f special interest as indicating, 

 if there is no mistake respecting the origin of the specimen, the 

 former presence on our Atlantic coast of a Phocine type exist- 

 ing at present only in the Antarctic Seas. The species was 

 described by Dr. Leidy in 1853, under the name Stenorhynchus 

 vetus. The description is based entirely on an outline drawing of 

 a tooth purporting to be from the "green sand of the Cretace- 

 ous series, near Burlington, New Jersey". The specimen was 

 never seen by the describer of the species, and was long since 

 lost. The tooth is said to have been found by Mr. Samuel A. 

 Wetherill, who gave it to Mr. T. A. Conrad, by whom was made 

 the drawing. "The figure", says Dr. Leidy, "represents a 

 double-fanged tooth, with a crown divided into five prominent 

 lobes. It is, without doubt, the tooth of a mammal, and resem- 

 bles very much one of the posterior molars of Stenorhynchus ser- 

 ridens, Owen, an animal of the Seal tribe. It may have be- 

 longed to a Cetacean allied to Basilosaurus, but until further 

 evidence is obtained I propose to call the species indicated by the 

 tooth Stenorhynchus vetus ".* Later the same writer referred the 

 species to Lobodon, and adds, "The specimen purports to have 

 been derived from the green sand, but is probably of miocene 

 age and accidental in its position in relation with the preceding 

 formation. The original of the tooth I have not seen, but it was 

 in the possession of Timothy Conrad, the well-known naturalist, 

 who made an outline drawing of it the size of nature, which is 

 represented in a wood-cut, of the same size, on page 377 of the 

 Proceedings of this Academy for 1853. The specimen has been 

 lost. The drawing of it so nearly resembles the representations 

 of the molar teeth of the Crab-eating Seal, Lobodon carcinophaga 

 of Gray, or the Stenorhynchus serridens of Owen, that it may be 

 regarded as an indication of an extinct species of the same 

 genus ".t The close resemblance of the figure to the tooth of 



*Proc. Acad. Nat. Sci. Phila., 1853, p. 377 (wood-out), 

 t Extinct Mam. N. Amer., 1869, p. 416. 



