CONTENTS. 



ART. IV.— On the Batrachia and Reptilia of Costa Rica. By E. D. Cope . 93 

 V. — On the Batrachia and Reptilia cjllected by Dr. John M. Brans- 

 ford during the Nicaraguar. Canal Survey of 1874. By E. D. 



Cope 155 



VI. — Report on the Reptiles brought by Professor James Orton from 

 the middle and upper Amazon and western Peru. By E. D. 



Cope . . . . » 159 



VII.— Note on the Ichthyology of Lake Titicaca. By E. D. Cope . 185 

 VIII. — A descriptive Catalogue of the Scalidse of the West India 



Islands. By O. A. L. Morch, Ph.D 189 



Extra copies printed in advance for the Authors. 



