51 



and Analyses from Nature. By J. Sprague. Superintended, 

 and with Descriptions, by Asa Gray, M. D. Vol. I. 8vo. Bos- 

 ton, 1848. Fro7n Rev. Francis Parkman. 



Dr. Theodore Cantor. Spicilegiunn Serpentium Indicorum. 

 8vo. pamph. London, 1839. From the Author. 



Catalogue of Reptiles inhabiting the Malayan Peninsula and 

 Islands. 8vo. Pamph. Calcutta, 1847. From the Author. 



Sheet from Proceedings of Entomological Society of London. 

 1842. (Coleopterous Insects from Chusan and Canton, by Rev. 

 T. Hope.) 8vo. London. Fro7n the Author. 



General Features of Chusan, with Remarks on the Flora and 

 Fauna of that Island. 8vo. Pamph. London, 1842. Frotn the 

 Same. 



Catalogue of Mammalia inhabiting the Malayan Peninsula and 

 Islands. 8vo. Pamph. From the Same. 



Proceedings of the American Philosophical Society. Vol. V. 

 No. 40. January to April, 184S. From the Society. 



Memoires de la Societe Phisique et de Histoire Naturelle. 

 Tome XI. 2d Partie. 4to. Geneve, 1848. From the Society. 



Bulletin de la Societe des Sciences Naturelles de Neuchatel. 

 1844-1846. 8vo. Neuchatel, 1847. 



July 5, 1848. 

 Dr. D. H. Storer, Vice-President, in the Chair. 



Present, twelve members. 



Mr. Desor announced that he had recently been studying 

 with the microscope the development of the ovum of a 

 marine v\^orm of the genus Nemertes, 



The eggs of this animal, which are of a bottle shape, are laid 

 in long strings, which are nearly of the size of the parent animal. 

 They are attached to the strings by the small extremity, and are 

 generally arranged in pairs. Two or three yolks are usually 

 found in each, and sometimes as many as nine, ten, or eleven, 

 rarely, only one. They are of very soft consistence, and are 



