NATURAL SCIENCES OF PHILADELPHIA. 11 



Of several mental foramina, the largest one is situated below tbe position of 

 the first premolar. 



The condyle holds the same relative height as in Tats. The back portion 

 of the jaw, including the coronoid process, is proportionately nut bo broad 

 in tbe latter. The masseteric fossa is shallower at its lower part., and is not 

 bounded by the everted base, but is defined a little above the latter in a curva- 

 ture sweeping from the condyle downward and forward to an angle about half- 

 way below the position of the last molar tooth. 



The molar teeth, of which there were five, completely occupied the space 

 back of the canine, as in some of the viverrine and musteline animals, there 

 being no hiatus in the series. All the molars were double-fanged, and none 

 appear to have been of the tubercular kind. 



The first premolar was the smallest, and the third premolar appears to have 

 been the largest tooth of the molar series. The fourth premolar was interme- 

 diate in size to the third and the last molar, whiah appears to have but little 

 exceeded this and the second premolar. 



The remains of the crown of the last molar indicate a bilobed tooth, appa- 

 rently like the sectorial molar of Felis, and without a heel. The crown of the 

 tooth in advance was provided with a well-developed heel, but the fore part 

 is too much broken to ascertain its form. The larger tooth in advance, the 

 third premolar, retains its heel, which has a subtrenchant fore and aft border, 

 and is bounded internally and externally by an oblique basal ridge. 



For the animal indicated by the fossil jaw, the name of l'atriojelis ulta is 

 proposed. The measurements of the specimen are as follow : 



Estimated length of lower jaw when complete G inches. 



Breadth of coronoid process at base If " 



Height at condyle, and below last molar tooth If " 



Height below first premolar l 



Length of molar series 3 



Breadth of crown of first molar tooth, 4J lines; second do., 8 lines ; third 

 do., 9 lines ; fourth do., 7f lines ; fifth do., 8 lines. 



Prof. Marsh exhibited specimens of the remains of a bird allied to the Tur- 

 key, which he considered as belonging to an extinct species. These remains 

 were said to have been found in the green sand of Monmouth Co., N. J., but 

 doubtless were from the post-tertiary above it. He proposed to name the 

 species Meleagris alius. 



Prof. Marsh also called attention to the tooth of a Peccary from the miocene 

 of Shark River, New Jersey. It is a second molar from the left side of the 

 lower jaw. He proposes to call the species to which it belonged Dicotyhs 

 antiquus. 



March 15 th. 



The President, Dr. Ruschenberger, in the Chair. 



Twenty members present. 



The following paper was presented for publication : 



" Cross Fertilization and Law of Sex in Euphorbia." By Th 



Meehan. 



March 22d. 

 Dr Carson, Vice-President, in the Chair. 



Thirty-six members present. 



The following paper was presented for publication : 



1870.] 



omas 



