ERRATA AND ADDENDA 



PAGK 



10, note, ELFING should read ELFVING. 



21, last sentence in next to last paragraph, should read : " On this account 

 even neutral nitrites kill such plants as have an acid cell-sap, but not 

 such as have a neutral cell-sap (some algae, e.g. Spirogyra)." 

 35. See the valuable paper of H. S. JEXNIXGS, Jour, of Physiology, XXI, 

 258-322, 1897, where it is shown that carbon dioxide in weak solu- 

 tions is attractive ; in strong solutions, repellent. 



59, line 3, 81.9% water should be 71.9%: line 4, 71.1% water should be 74.1%. 

 64. See WILL, Centralbl. f. Bakteriol. (2), III, 17; latent life of yeast. 

 72, second note, next to last line, one-tenth of should read ten times. 

 88, second line from bottom, FREDERIC should read FREDERICQ. 

 108, fifth line from bottom, JONNSON should read Joxssox. 

 113, line 9, should read, "cannot be affected, as a whole, by gravity." 

 127, fourth line from the bottom, electrometer should read electrodynamometer. 

 146, line 13, galvanotaxis should read electrolaxis. 

 157, Table XVII. Other solutions are suggested by WIESNER, '79, Wien. 



Denkschrift, XXXIX, 187. 

 160. For measurement of chemical intensity see WIESNER, '93. Sitzungsber. 



Wien. Akad. CII, 298. 

 170. line 5, over should read under. 



174, line 13, ELVIXG should read ELFVIXG ; so, too, on p. 213. 

 191, description of Fig. 56, line 1, spaces should be species. 

 196, first paragraph. Dr. A. D. MEAD informs me that at Wood's Holl 

 Diastylus swims free at night so that it is taken in the tow. Con- 

 sequently these crustaceans are not exclusively mud-inhabiting, and 

 may constitute no exception to the rule. 

 209, first two lines should read, "migrated in travelling 18 cm. in full light, 



15% faster than the same individual migrated in light \ as strong." 

 224. A fuller table than that of RISCHAWI is given by CLAUSEN, '89, 



Landw. Jahrbiicher, XIX, 907, 911. 



230. Compare with Campbell's table the similar results of EDWARDS, 

 Studies Biol. Lab., Johns Hopkins Univ., July, 1887 ; and those of 

 HUNT, '97, Science, V, 907. 

 247, line 15, dele words " between Bombyx." 



251. Trustworthy observations on organisms in hot springs have lately 

 been made by DAVIS, Science, July 30, 1897, and SETCHELL, Univer- 

 sity (of California) Chronicle, I, 110-119. 



509 



