26 Report of the President. 



group to illustrate the habits of the land-crabs of the West 

 Indies, the accessories and one specimen for a group of 

 Iguanas, besides color-sketches of corals, mollusks, sea-fans, 

 etc., to be used in constructing a coral reef in the Museum. 

 Many of these drawings have been of great value in making 

 models of some of the larger West Indian mollusks for the 

 synoptic collections. Some of the material collected will be 

 of use in supplying specimens to the New York City schools. 

 There is also a good deal of new and undescribed material 

 among the Bahaman insects and myriopods. 



Among the numerous acquisitions to the Department dur- 

 ing the past year the following deserve special mention: A 

 large collection of marine invertebrates from Vineyard Sound, 

 Mass., purchased from Mr. F. W. Walmesley ; forty-seven 

 species of Ccelenterata acquired by exchange with the Dublin 

 Museum, Ireland, through Dr. J. E. Duerden; the above- 

 mentioned collection of corals, etc., made in the Bahamas by 

 Professor Wheeler and Dr. Dahlgren ; and a fine collection, 

 comprising more than a thousand vials, of spiders from the 

 United States, the work of the late Horace Britcher and do- 

 nated to the Museum by the mother and the friends of the 

 young naturalist. 



' Several scientific papers have been published during the 

 past year by members of the department. Dr. J. E. Duerden 

 has published the following: "The Antiquity of the Zoanthid 

 Actinians," "Recent Results on the Morphology and Develop- 

 ment of Coral Polyps," "The Morphology of the Madrepo- 

 raria V. Septal Sequence," "The Coral Siderastroza radians 

 and its Postlarval Development." The following have been 

 published by Professor Wheeler: "Three New Genera of In- 

 quiline Ants from Utah and Colorado," "The Obligations of 

 the Student of Animal Behavior," " A Crustacean-eating Ant," 

 "The American Ants of the Subgenus Colobopsis" "Ants 

 from Catalina Island, California," " The Ants of North Caro- 

 lina," "A New Type of Social Parasitism among Ants," "The 

 Phylogeny of the Termites," etc. 



Especially valuable and important has been the work ac- 

 complished by Assistant Curator Sherwood in developing and 



