50 [May, 1846. 



Dr. Hallowell also read a description of a new species of 

 bat from Western Africa, which was referred to Mr. Cassin, 

 Drs. Leidy and Zantzinger. 



Dr. Leidy read a paper entitled " Remarks on the Anatomy 

 of the abdominal viscera of the Sloth, Bradypus tridactylus, 

 L.," accompanied with two drawings representing the uterus 

 containing an embryo, and the embryo with its membranes. 

 Referred to Drs. Morton, Hallowell and Goddard. 



Stated Meeting, May 19, 1846. 

 Vice President Morton in the Chair. 



DONATIONS TO MUSEUM. 

 Specimen, in spirits, of Pteropus Haldemani, Hallowell, a 



new species of bat from Western Africa, described by Dr. 



Hallowell in a paper read at last meeting. Presented by 



Dr. Hallowell. 

 Jaw of a Shark, taken off Cape Island, N. J. ; also the beak 



or muzzle of Squalus pristis, Linn., (common Saw-fish,) 



from the same locality. Presented by Dr. C. W. Pennock. 



DONATIONS TO LIBRARY. 



Proceedings of the Boston Society of Natural History, Jan., 

 1846. From the Society. 



A Synopsis of the Fishes of North America. By David 

 Humphreys Storer, M. D. 4to. Cambridge: 1846. From 

 the Author. 



American Journal of Arts and Sciences. Vol. 1, No. 3. New 

 series. From the Editors. 



American Quarterly Journal of Agriculture and Science, con- 

 ducted Drs. Emmons and Prime. Vol. 3, No. 2. From 

 the Editors. 



Prof. Johnson offered some observations on the subject of 

 floating docks, illustrating, by means of models and drawings, 

 the principles of construction, and their application to prac- 

 tical purposes. 



