XLII CONTENTS. 



Page. 



Section C — Continued. 



Pygopodes. — The Divers 176 



Podicipedidse (the Grebes) 176 



ColymbidiB (the Loons or Divers) 177 



Alcidte (the Auk tribe) 177 



MOUNTED GROUPS OF BIRDS. 



Group A. — Bittern and Ibises 181 



Group B. — Bittern. Herons, and Spoonbill 181 



Group C. — Goose and Brant 181 



Group D. —Black-bellied and Fulvous Tree Ducks 181 



Group E. — Teals, Canvas-back, and Red-head 181 



Group F.— Wood Duck, Shelldrake, &c 182 



Group G. — Harlequin Duck, Steller's Duck, &c 182 



Group H. — American Anhinga, and Snake Bird 182 



Group I. — Laughing Gull, Bonaparte's Gull, &c 182 



Group J. — Fulmar Petrel, Cinereous Shearwater, &c 183 



Group K.— Grebes 183 



Group L. — Auks, Puffin, and Guillemot 183 



MOUNTED BIRDS. 



American Sea Eagle 184 



American Wbite Pelican 184 



Brown Pelican 184 



Section D.— CATALOGUE OF THE ECONOMIC MOLLUSCA AND THE 

 APPARATUS AND APPLIANCES USED IN THEIR CAPTURE AND 

 PREPARATION FOR MARKET. 



By Lieut. Francis Winslow, U. S. N. 



Introduction 187 



Mollusca Cephalopoda 187 



Small Squids 187 



Giant Squids 191 



Octopus or Devil-Fish 191 



Mollusca Encephala 192 



Gasteropoda 192 



Haliotidse, &c 193 



American Oyster ( Ostrea virginica) 198 



Biology of Oyster 198 



Breeding habits 198 



Impregnation of eggs 200 



Number of eggs 201 



Tbe development of the eggs 205 



Oyster industry 218 



Clams, Mussels, Scallops, &c 229 



Catalogue of exhibits 243 



Mollusca Cephalopoda - 243 



Squids and Cuttles 243 



Mollusca Gasteropoda 243 



Sea Snails 243 



Useful for food or bait 243 



; Useful by producing Pearl Shell 244 



Manufactured state of Haliotis Shell 245 



