'^^^ 



co]n^th:nts. 



J. G. Hunt, M.D. On the Structure of Scbizsea pusilln, . . 9 

 Thos. Meehan. Dimorphous Flowers in Passiflora ... 9 



Jos. Leidy, M.D. Remarks on Hydra 10 



Edw. D. Cope. On the Age of the Lignite Beds of the Missouri 



River 10, 12 



J. L. LeConte, M.D. On the Age of the Lignite Beds of the 



Missouri River 12 



H. C. Chapman, M.D. On the muscles of the hind leg of Fiber 



zibethicus 13 



Joseph Leidy, M.D. Remarks on Protozoa . . . .13 

 Jos. Leidy, M.D. On the Mode of Growth of Desmids . .15 



Standing Committees for 1814 16 



Jos. Leidy, M.D, Extract from a Letter relating to Mammalian 



Fossils in California 18 



Thos. Meehan. Elevation of the Trunks of Trees . . .22 



Jos. Leidy, M.D. On Actiuophrys sol 23 



T. A. Conrad. Remarks on the Tertiary Clay of the Upper Ama- 

 zon, with descriptions of new shells 25 



W. G. BiNNEY. On the Anatomy and Lingual Dentition of Ario- 



limax, and other Pulmonata 33 



Edw. D. Cope. Description of some species of Reptiles obtained 

 by Dr. John F. Bransford, Assistant Surgeon United States 

 Navy, while attached to the Nicaraguan Surveying Expedi- 

 tion in 18t3 C^i 





