CONTEISTTS 



PAGE 



List of Additjons to the Library,.... .. ... .... y 



Art. I. — Report on the dredgixgs in the regiox of St. 



George's Banks, ix 1872. By S. 1. Smith and O. 



Harger. Plates 1 -8, 1 



Art. IL — Descriptions of new and rare species of Hy- 



DROIDS FROM THE NeW EnGLAND COAST. By S. F. 



Clark. Plates 9-10, _ 58 



Ar'J'. III. — On the Chondrodite from the Tilly-Foster 

 IRON MINE, Brewster, N. Y. By E. S. Dana. Plates 

 11-13, 67 



Art. IV. — On the Transcendental curves sin y sin iny=. 

 a %\n X ^\w nx-\-h. By H. A. Xewton and A. W. 

 Philips. Plates 14-37, . 97 



Art. V. — On the equilibrium of heterogeneous sub- 

 stances. By J. W. GiBBS. First Part, 108 



Art. VI. — The Hydroids of the Pacific coast of the 

 United States south of Vancouver Island, with a 



REPORT upon those IN THE MuSEUM OF YalE ColLEGE. 



By S. F. Clark. Plates 38-41, 249 



Art. VII. — On the anatomy and habits of Nereis virens. 



By F. M. Tubnbull. Plates 42-44, 265 



Art. VIII. — Median and paired fins, a contribution to 



THE history of VERTEBRATE LIMBS. By J. K. ThACHER. 



Plates 49-60, 281 



Art. IX. — Early stages of Hippa talpoida, with a note 



ON the structure of the MANDIBLES AND MAXILLA IN 



HipPA AND Remipes. By S. I. Smith. Plates 45-48, 311 

 Art. X. — On the equilibrium of heterogeneous sub- 

 stances (concluded). By J. W. Gibbs, 343 



