384 MINNESOTA BOTANICAL STUDIES. 



1106. Russell, J. L. Sea-weeds. Am. Nat. 2:225-235. 

 J11868. 



A popular discussion. 



1107. . The Sea-weeds at Home and Abroad. Am. 



Nat. 4:274-297. /. 65-75. J 11870. 



1108. Ryder, J. A. The Protozoa and Protophytes con- 

 sidered as the Primary or Indirect Source of the Food of 

 Fishes. (2d Ed. revised.) U. S. Comm. Fish and Fish- 

 eries. Part IX. Rep. Comm. for 1881. 755-770. 1884. 



1109. . An Account of Experiments in Oyster Cult- 

 ure and Observations Relating thereto. Second Series. U. S. 

 Comm. Fish and Fisheries. Rep. Comm. for 1882. 763-778. 

 1884. 



1110. . The Polar Differentiation of Vol vox, and the 



Specialisation of possible Anterior Sense-organs. Am. Nat. 

 23:218-221. Apl889. 



1111. . On the Fore and Aft Poles, the Axial Dif- 

 ferentiation and a Possible Anterior Sensory Apparatus of 

 Vol vox minor. Proc. Phil. Acad. 1889:138-140. (21My 

 1889. ) 1890. 



1112. . On the cause of the Greening of the Oyster 



and its presumed Algous Endoparasites. Proc. Phil. Acad. 

 1892:352. (15N1892.) 1893. 



Investigations resulted in the finding of desmids, diatoms and the 

 spores of Ulva. 



. See Puysegur, M. and Ryder, J. A. 



Saccardo, F. See Toui, (x. B. de, and Saccardo, F. 



1113. Saccardo, P. A. The Number of Plants. Atti Cong. 

 Bot. Internat. 1892.— (Am. Nat. 28:173-180. F1894.) Trans- 

 lated by Roscoe Pound. 



The total number of species of algae known is placed at 12,178. 



1114. Sadler, J. List of Arctic Cryptogamous Plants, etc., 

 Collected by Robert Brown, Esq., during the Summer of 1861, 

 on the Islands of Greenland, in Baffin's Bay and Davis Straits. 

 Trans. Bot. Soc. Edinb. 7 : 374, 375. 1863. 



1115. Safford, W. E. Botanizing in the Strait of Magellan. 

 Bull. Torr. Bot. Club. 15:15. 5Jal888. 



Collected 14 species of marine algae. 



1116. Sargent, F. L. Guide to the Recognition of the Prin- 

 cipal Orders of Cryptogams and the commoner and more easily 

 distinguished New England Genera, with a Glossary. C. W. 

 Sever. 1-39. 1886. Cambridge.— (Bot. Gaz. 11:283-285. 01886.) 



Two genera of Characeae and genera among 3 orders of marine algae. 



