PROCEEDINGS. VII 



Prof G. B. Goode read a paper on the Colors of Fishes.* 

 Prof. C. V. Riley spoke on the Colors of Insects. 

 The papers were briefly discussed by Messrs. Mann, Dall, 

 Seaman and Ward. 



One Hundred and Fifty-ninth Meeting. 

 April 5, 1890. 



The President in the chair, and twenty-five members 

 present. 



Dr. Theobald Smith read a paper entitled Some Illus- 

 trations OF Ferments and Fermentation among Bac- 

 teria. t Discussed by Professor Atwater. 



Dr. R. R. Gurley presented a paper on the American 

 Graptolites. 



One Hundred and Sixtieth Meeting, 

 April 19, 1890. 



The President in the chair, and fortj^-five members present. 



Dr. C. W. Richardson was elected an active member of the 

 Society. 



Dr. Merriam presented a paper entitled Historical Re- 

 view OF THE FaUNAL AND FlORAL DIVISIONS THAT HAVE 



BEEN Proposed for North America. Discussed by Dr. 

 Dall. 



Prof. J. P\ James read a paper entitled Variation with 

 Especial Reference to Certain Paleozoic Genera. 

 Discussed b\' Professor Ward. 



Dr. Dall exhibited some Original Drawings of the 

 Fur Seal and Stellers' Sea Cow.t and gave an account 

 of them. 



* Trans. Am. Fisheries Society, 1890. 



t Centralblatt fiir Bakteriologie u Parasitenkunde, vii, 1890, p. 502. 



X Report U. S. Coast Survey and Geodetic Survey, 1890. 



