CONTENTS. 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF THE 



MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD 



COLLEGE, UNDER THE DIRECTION OF E. L. MARK. 



Page 

 No. 1. — The Anatomy of HEMiuRtrs crenatus (Rud.) Luke, an Appendi- 

 CULATE Trematode. By Clarence H. Lander. (4 Plates.) January, 

 1904 1 



No. 2. — The Development of the Mesonephros and the MiJLLERiAN Ducts 

 in Amphibia. By Robert W. Half.. (8 Plates.) June, 1904 .... 29 



No. 3. — The Optic Refle.x Apparatus of Vertebrates for Short-circuit Trans- 

 mission of Motor Reflexes through Reissner's Fibre; its Morphology, 

 Ontogeny, Phylogeny, and Function. — Part I. The Fish-like Vertebrates. 

 By Porter E. Sargent. (11 Plates.) July, 1904 127 



No. 4. — The Maturation, Fertilization, and Early Cleavage of Haminea 

 Solitaria (Say). By W. M. Smallwood. (13 plates.) December, 1904 259 



