CONTENTS. 



Page 

 No. 1. — Report on the Brachiopoda obtained by the United States Coast 

 Survey Expedition in charge of L. F. de Poortales. With a Revision 

 of the Craniidaa and Discinidae. By W. H. Dall. (2 Plates) . . 1 



No. 2. — Application of Photography to Illustrations of Natural History. 

 With two Figures printed by the Albert and Woodbury Processes. By 

 Alexander Agassiz .47 



No. 3. — A Letter concerning Deep-Sea Dredging, addressed to Professor 

 Benjamin Peirce, Superintendent United States Coast Survey. By 

 Louis Agassiz 49 



No. 4. — Preliminary Notice of a few Echini. By Alexander Agassiz . 55 



No. 5. — Fossil Cephalopods of the Museum of Comparative Zoology. — 



Embryology by Alpheus Hyatt. (4 Plates) 59 



Embryology, 66 ; Umbilicus, 76 ; Whorls, 76 ; Septa, 81 ; The Shell, 103. 



No. 6. — Notes of an Ornithological Reconnaissance of Portions of Kansas, 

 Colorado, Wyoming, and Utah. By J. A. Allen . . . .113 



I. List of Birds observed at Leavenworth, Kansas, from May 2 to 



May 11, and at Topeka, Kansas, from May 11 to May 24, 1871. 

 With Annotations 122 



II. List of Birds observed in the Vicinity of Fort Hays, Kansas, from 



May 26 to July 3, 1871. With Annotations .... 131 



III. List of Birds observed in Northwestern Kansas, December 25, 



1871, to January 12, 1872. With Annotations . . . .142 



IV. List of Birds observed at Cheyenne, Wyoming Territory, from 



August 16 to August 28, 1871. With Annotations . . .144 

 V. List of Birds observed at the Eastern Base of the Rocky Mountains 

 in Colorado Territory, between Colorado City and Denver, in 

 July and August, 1871. With Annotations . . . .146 

 VI. List of Birds observed in South Park, Park County, Colorado Ter- 

 ritory, in July, 1871. With Annotations 153 



VII. List of Birds observed in the Vicinity of Mount Lincoln, Park 

 County, Colorado, from July 19 to July 26, 1871. With Anno- 

 tations 159 



