76 PROCEEDINGS OF THE ACADEMY OP 



April 28. 

 The President, Dr. Ruschenberger, in the chair. 

 Twenty-one members present. 



On Echinorhynchus moniliformis. Dr. H. C. Chapman matle 

 the following remarks: I take the opportunity of exhibiting spe- 

 cimens of the rare and interesting worm the Echinorhynchus moni- 

 liformis from the alimentary canal of the Fox Squirrel (Sciurus 

 vulpinus) known to occur also in the Hamster and Field Mouse. 

 This species is so called from its resembling a row of pearls ; its 

 posterior portion is, however, smooth. The color of the worm is 

 white. The characteristic snout is armed with about a dozen 

 rows of recurved hooks, which enables the worm to hold on to the 

 animal which it infests. This proboscis is retractile, being moved 

 by delicate muscles. The male is much smaller than the female, 

 and can be readily distinguished by the sac at its posterior extre- 

 mity, which serves as a receptacle for the penis. In this species 

 the testicles occupy only a small portion of the posterior part of 

 tlie animal, while the ovaries, filled with eggs, extend through the 

 entire length of the body. The female in this species attains a 

 length of eleven inches, the male only that of from four to five. 

 The Echinorhynchus is a member of the Acanthocephali or " Spiney 

 Heads," a family of round worms. 



There not being a quorum present for the transaction of busi- 

 ness, the meeting adjourned until May 5, when the following were 

 elected members: 



Reuben Haines, G. Schwartz, Galloway C. Morris, John N. 

 Coles, M.D., U. S. Navy, Hugh Hamilton, M.D., and Charles P. 

 Perot. 



Don Antonio del Castillo, Don Mariano Barcena, and Don Jos^ 

 Joaquin Arriaga, of Mexico, were elected correspondents. 



May 5. 



The President, Dr. Ruschenberger, in the chair. 



Thirty members present. 



^ The following papers were presented for publication: 



"On the Habits of some American Species of Birds and other 

 things Ornithological." By Tlios. G. Gentry. 



