INDEX OP SUBJECTS 



341 



Whole larvae from blastomeres or 

 egg-fragments, in the Newt, 173 ; 

 in Teleostei, 178 ; in Amphioxus, 

 180 ; in Coelenterates, 181 ; in 

 Echinoderms, 193, 197 ; in Nemer- 

 tines, 204, 207. 



Withdrawal of water, see Water. 



Woman, see Human being. 



Worcester, Mass., school-children, 

 growth of, 63. 



Xylol, 54. 



Yellow light, 94-96. 



Yolk, 2 ; influence of, in cleavage, 24, 



29, 48 ; specific gravity of, 78 ; 

 descent of, in inverted eggs, 84 ; 

 in centrifugalized eggs, 88 ; in- 

 jured by heat, 97 ; by cold, 98 ; by 

 salts, 119, 135 ; effect of removal 

 in Teleostei, 178 ; of Cynthia, 230 ; 

 -cells of Triclads and Salps, 5 ; 

 -gland of Turbellaria, 5 ; -lobe, see 

 Lobe, polar ; -nuclei in centrifuga- 

 lized Frog's egg, 30, 88; in eggs 

 grown in salt, 119; -plug persistent 

 as a result of heat, 99 ; of cold, 100; 

 involutions of salts, &c., 119 sqq. ; 

 -sac ruptured in eggs that are not 

 turned, 89 ; of Fundulus, pigment 

 of, 94, 111, 114,274. 



ADDENDA ET CORRIGENDA 



P. 5, 5 lines from bottom, for unicellular read multicellular. 



P. 28, line 10, after irregular, insert and in Triclads. 



P. 57. To Literature add J. SACHS. Die Anordnung derZellen in jungsten 

 Pflanzentheilen, Arb. Bot. Inst. Wilrsburg, ii, 1882. 



P. 114. To Literature add G. BUNGE. Weitere Untersuchungen iiber die 

 Athmung der Wurmer, Zeitschr. physiol. Chem. xiv, 1890. 



P. 140, line 22, for prospective potentialities read prospective signifi- 

 cances. 



P. 225, 2 lines from bottom, far is now placed in read has now moved 

 into. 



P. 271. To Literature add W. S. SUTTON. On the morphology of the 

 chromosome group in Brachystola magna, Biol. Bull, iv, 1902. 



P. 278. To Literature add 3. W. JENKIKSON. On the effect of certain 

 solutions upon the development of the Frog's egg, Arch. Ent. Mech. xxi, 1906. 



