Part 6.— MOLLUSCA— Continued. 

 Section 2.— MOLLUSKS (NOT INCLUDING OYSTERS). 



CONTENTS. 



Page. 



General 255 



Habits 255 



Physiology 255 



" Nutrition 256 



Food 256 



Growth 256 



Environmental factors 256 



Pathology and pathological condi- 

 tions 256 



Mortality 256 



Parasites 256 



Embryology 256 



Anatomy 257 



Culture.' 257 



Clams 257 



Mussels 257 



Snails 258 



Fisheries. 258 



United States 258 



\balone 258 



Clams 258 



Mussels 258 



Pearl 259 



Scallop 259 



Squid 259 



Europe 259 



Legislation for mussels 259 



Page. 



Products 260 



Buttons 260 



Shellfish as food 260 



Miscellaneous 260 



Clams 260 



Mussels 260 



Scallops 260 



Squid 260 



Geographical distribution 260 



United States 260 



General 260 



Arkansas 261 



California 261 



Illinois 261 



Indiana 261 



Maine 261 



Massachusetts 262 



Minnesota 262 



Missouri 262 



New York 262 



Oklahoma 262 



Tennessee 262 



Texas 262 



Rivers 262 



Porto Rico 262 



Hawaiian Islands 262 



GENERAL. 



Collins, J. W.: A large squid. Bulletin, 1884 (1884), vol. IV, p. 15. F18-206 



Sigerfoos, Charles Peter: Natural history, organization, and late development of 

 the Teredinidae, or shipworms. Bulletin, 1907 (1908), vol. XXVII, p. 191-231, 

 pis. VII-XXI. Doc. 639 issued Dec. 18, 1908. 8-35783 



Some notes on American shipworms. Bulletin, 1897 (1898), vol. XVII, p. 



189-191. Doc. 369 issued 1898. F12-110 



Wright, H.: [American clams in England.] Bulletin, 1886 (1887), vol. VI, p. 131. 



HABITS. 



Coker, R. E., A. F. Shira, H. W. Clark, and A. D. Howard: [Habits of fresh- 

 water mussels, p. 81]. Bulletin, 1919-20 (192-), vol XXXVII. 



Sigerfoos, Charles Peter: Natural history', organization, and late development of 

 the Teredinidae, or shipworms. Bulletin, 1907 (1908), vol. XXVII, p. 191-231, 

 pla. VII-XXI. Doc. 639 issued Dec. 18, 1908. 8-35783 



Simpson, Charles Torrey: The pearly fresh-water mussels of the United States; 

 their habits, enemies, and diseases, with suggestions for their protection. Bulle- 

 tin, 1898 (1899), vol. XVIII, p. 279-288, illus. Doc. 413 issued Nov. 1, 1899. 



F 12-99 

 PHYSIOLOGY. 



Grave, Benjamin Harrison: Anatomy and physiology- of the wing-shell Atrina 

 Tigida. (Bibliography: p. 437-138.) Bulletin, 1909 ('l911), vol. XXIX, p. 409- 

 439, illus., pi. XXVlII-L. Doc. 744 issued May 4, 1911. Fl 1-156 



255 



