130 [Dec, 1846. 



Mr. Grant, of Philadelphia, read a paper containing ob- 

 servations on Hybridity in Animals, which was referred to 

 a committee, consisting of Messrs. Cassin, Phillips and Mor- 

 ton. 



Stated Meeting, Dec. 8, 1846. 

 Vice President Morton in the Chair. 



A communication was read from the Essex Co. (Mass.) 

 Natural History Society, dated Dec. 1, 1846, acknowledg- 

 ing the receipt of recent Nos. of the Society's Proceedings. 



Dr. Hallowell read a description of the locality, near Platts- 

 burg, New Jersey, whence the fossil bones of a young Mas- 

 todon, presented at a late meeting of the Society, had been 

 obtained by himself and other members. 



Dr. H. gave the following enumeration of the bones, for 

 which the Academy is indebted to the liberality of Mr. Wil- 

 liam Pancoast, the proprietor of the farm on which they were 

 found. 



Eleven ribs nearly perfect, seven of which belong to the 

 left side ; one rib of same side much mutilated ; two scapulae 

 imperfect ; a humerus, two feet three inches long (French 

 measure) with the head separated from it; three cervical ver- 

 tebrae and six dorsal well preserved ; one lumbar and four 

 caudal vertebrae ; two vertebral spinous processes ; the 

 ossa innominata, fractured, with the acetabula perfect, 

 but the foramina thyroidea incomplete, and the ischia 

 partly broken off; one patella ; the head of the os femoris and 

 upper portion of the shaft of the bone ; a scaphoid and other 

 small bones of the feet ; with numerous undetermined frag- 

 ments of bone. Besides these, there are two others, sup- 

 posed to be the zygomatic processes of the temporal bones. 

 The epiphyses are separated from the upper extremity of the 

 os humeri and of the femur, which, with the size of the 

 bones, indicate that they belonged to a young animal. 



