494 Proceedings of the Roi/al Physical Society. 



Addenda to General List. 



(206-222.) 



206. Dall, W. H. Deep-Sea MoUusca. Bull. Mus. Comp. 



Zool, xii. (1886), pp. 171-318, 9 pis. 



207. Edwards, F. W. De I'influence des agents physiques sur 



la vie. Paris, 1824. 



Inter alia, effect of nutritive changes on frogs (quoted hy 

 Yung). 



208. FoNTANNES, M. Sur certaines correlations entre les modi- 



fications qu'eprouvent des especes difi'erents, soumises 

 aux meme influences. Comptes Rendus, ciii. (1886), 

 pp. 1022-1024. 



209. FucHS, T. Was haben wir unter der " Tiefsee-fauna " zu 



verstehen, und durch welches physical ische moment 

 wird das Auftreten derselben bedingt. Verh. Geol. 

 Reichanst., Wien, 1882. 



210. Gautier, a. Du mecanisme de la variation des etres 



vivants. Hommage a M. Chevreul, Paris (1886), pp. 

 29-52. 



Constancy of a form is "nothing more than the resultant of 

 the forces which maintain the chetnical species of which 

 the organism is composed. The condition of variation, 

 or of individualisation, is, on the contrary, the more or 

 less marked facility which these essential specific mole- 

 cules possess of varying slightly in annexing different 

 secondary radicals." 



211. Gerlach, L. Ueber neuere Methoden auf dem Gebiete der 



experimentellen Embryologie. Biol. Centlblt., vii., 

 19 (1887), pp. 588-605. Anat. Anz. (1887), Nos. 

 18, 19. J. R. Micr. Soc. (1888), pp. 16, 17. 



Effect of localised heat and cold, of mechanical pressure, and 

 of chemicals, retarding the influence of chloral hydrate on 

 segmentation. 



212. Rupert, Jones. Geol. Mag., ix., 1882. 



Destructive action of environment on Fauna. 



213. Krukenberg, C. F. W. Vergleichend-Physiologische Vor- 



trage. Die Bedeutung der Vergleichenden Methode 

 fiir die Biologic. Heidelberg (1882), pp. 36. 

 e.g., pp. 9, 10. {Of. also Ids copious references.) 



