J 72 Proceedings of the M Y. Lyceum. 



Specimens were received from M. Milbert illustrating 

 the geology of the island of St. Pierre Miguelon, near New- 

 foundland. 



Dr. Van Rensselaer presented specimens of the marbles 

 and of the iron ores of Vermont and Crown point. 



24th. Mr. Halsey presented several specimens of 



worms. Dr. Dekay offered drawings and descriptions of 

 two of them, supposed to be new species of intestinal 

 worms, inhabiting the body of the common cricket. They 

 were described under the names of ascaris grylli, and fis- 

 suia grylli. 



This being the Anniversary meeting of the Lyceum, the 

 following officers were elected for the ensuing year : 

 President, Samuel L. Mitchill, M. D. LL. D. fyc. 

 1st. Vice President, John Torrey, J\L D. 

 2d. Vice President, Rev. D. H. Barnes A. M. 

 Corresponding Sec'y. J. E. Dekay, M. D. 

 Recording Sec'y. A. Halsey, Esq. 

 Treasurer, L. Bull, Esq. 



Mr. Barnes, ^ 



Mr. I Cozzens, \ 

 Dr. Dekay, y Curators. 



Mr. Halsey, I 



Dr. Van Rensselaer,] 

 Anniversary Orator, Dr. f^an Rensselaer. 

 March 3d. — Mr. Barnes reported on specimens of Chi- 

 ton, animal and shell, from Peru ; he considers them as two 

 new species, and describes them at length under the name 

 of Chiton niger and C. Echinatus. 



10th. — A translation was read by Dr. Dekay of a letter 

 from Mons. Geoflfroi relative to the organization of dia- 

 delphous animals, in which he proposes as subjects of en- 

 quiry, 1st. To verify at any period of gestation, the exist- 

 ence of a foetus in either uterus. 2dly. To ascertain 

 whether the ovula is found in the fallopian tube or ovary. 

 3dly. If this product is discovered, to note its characters: 

 is it an egg, i.e. with centre yolk and exterior white, or on- 

 ly an ovule ? 



J 7th. — Mr. Barnes read an Essay on the genus Alasmo- 

 donta of Say, and described three new species, A : arcuata ; 

 A : rugosa ; A : complanata. (Published in No. XIV of thi^ 

 Journal.) 



