72 American Philosophical Society. 



Mr. Sansom also exhibited a specimen of Galeobdolon luteum 

 (Smith), in which the terminal petal was salver- shaped, 5-lobed, 

 stamens four. 



A paper was read from Mr. T. Sansom, being " Notes of the First 

 Excursion of the Members of the Society into Kent in June last ; 

 containing the habitats of the rarer species of flowering plants, and 

 also notes on the most interesting specimens collected." 



AMERICAN PHILOSOPHICAL SOCIETY. 



Nov. 5, 1841. —The Committee, consisting of Dr. Horner, Mr. 

 Wetherill, and Dr. Goddard, to whom Dr. Harlan's paper, entitled, 

 " Description of the Bones of a Fossil Animal of the Order Eden- 

 tata," was referred at the last meeting, made a report recommend- 

 ing its publication in the Transactions, which was ordered accord- 

 ingly. 



These bones form part of the extensive collection of fossils re- 

 cently exhibited in Philadelphia by Mr. A. Koch, by whom they 

 were obtained in Benton County, Missouri. 



Among them, more or less perfectly preserved, are two ossa hu- 

 meri, two tibiae, two portions of the radius, two of the clavicle, parts 

 of several ribs, twelve vertebrae, a cubitus, twenty-four teeth, eight 

 of them in their sockets, two fragments of a lower jaw, with two 

 and three teeth in situ, two fragments of the upper jaw, five ungueal 

 phalanges, the sternum of four articulated pieces, and a part of the 

 ilium and sacrum. 



These specimens apparently belonged to three individuals of the 

 same species. They were found, with portions of a mastodon, in 

 company with numerous tropical vegetable remains. They are fri- 

 able and light, not petrified, but destitute of animal matter. 



The teeth are very similar in structure to those of the Megalonyx, 

 though the pieces of the lower jaw are stouter : the jaws may have 

 contained six or seven teeth on each side. 



The largest os humeri is twenty inches long and fourteen in dia- 

 meter ; it is of a massive structure, and deeply grooved by the mus- 

 cular attachments. In place of a foramen, as in the humerus of the 

 Megalonyx, the exterior surface, near the elbow joint, has a deep 

 groove, for the origin of the flexor muscles. The condyles are of 

 great breadth, as in the Megatherium. The inferior articulating sur- 

 face consists of two facets, one exterior and convex, the other de- 

 scribed by Dr. Harlan as concavo-convex, admitting a ginglymous 

 and rocking motion. 



The cubitus or ulna is a short and strong bone, with strong marks 

 of muscular attachments : this was part of an animal of less size than 

 that to which the large humerus belonged. A peculiarity of this bone 

 consists in the position of its superior articulating surface, which is 

 nearly in the middle of its shaft ; the olecranon process being very 

 long, and extending upwards. The lower articulating surface was 

 articulated with the carpal bones, as well as the radius. The total 

 length of this bone is sixteen inches. 



