256 [June, 1S45 



Since the above communication was written, I have visited Albany, and 

 through the politeness of Professor Emmons, had an opportunity of examining 

 the teeth of the Zeuglodon cetoides, (Owen.) I was much struck with the 

 similarity in their general characters with those of the Dorudon. They are 

 very much of the same form, but the crown rounded instead of hastate — the 

 serratures are similar, though more crenate. The fangs of some are inserted 

 almost perpendicularly, while in others they are divergent, and fixed in the 

 sockets as in the Dorudon. The teeth of the Zeuglodon are solid, of dense 

 structure, and very strong, resembling those of Cetacea, while the hollowness of 

 those of the Dorudon approximate it to the Saurians. The jaw of the Zeuglo- 

 don is much shorter, and proportionally thicker. The conformation being 

 similar, while the specific characters of these teeth separate them, I am disposed 

 to think that the Dorudon is an intermediate connecting link between these 

 two great classes. 



Professor Emmons is about to publish correct drawings of the teeth of the 

 Zeuglodon, which Professor Owen has not given, from having imperfect speci- 

 mens. 



'References to the Plate. 



1. Tusk of Lower Jaw of Dorudon. 



2. Edge View of No. 1. 



3. Edge View of No. 5. 



4. Portion of Upper Maxilla, with Teeth. 



5. Inner View, showing the Insertion of the Fangs. 



Dr. Morton read a letter from Mr. J. J. Audubon, dated 

 New York, June 3d, 1S45, offering to "the Academy to dis- 

 pose of a very fine collection, made by himself, of American 

 Quadrupeds, mounted and in skin, and now in his possession. 

 A list of the same was enclosed, including between sixty-five 

 and seventy species, among which are several Buffaloes, a 

 number of Deer, Antelopes, Elks, Rocky Mountain Goat, 

 Wolves, Grisly Bear, Peccary, Porcupines, and numerous 

 specimens of the smaller quadrupeds. On motion, referred to 

 the Zoological Committee. 



'O* 



The following gentlemen were elected Correspondents of 

 the Academy. 



M. E. Chevreul, Director of the " Museum d'histoire 

 naturelle a Paris." 



Robert W. Gibbes, M. D., of Columbia, S. C. 



Victor Audubon, Esq., of New York. 



And Mr. Theodore F. Moss, of Philadelphia, was elected 

 a member of the same. 



