Influence of Enviro7iment upon the Organism. 489 



160. Pick, H. Ueber den Einfluss des Lichts auf die Gestalt 



und Orientirung der Zellen des Assimilationsgewebes. 

 Bot. Centralblt., xi., Nos. 37, 38, 1 pi. 



161. Plateau, F. Recherches siir la perception delalumiere par 



les Myriopodes aveitgles. J. de I'Anat. Physiol., xxii. 

 3 (1886), p. 431. Gf. Coinptes Rendus, xcvii. (1883), 

 p. 467. 



Abundant references to literature discussing light-seeking and 

 the reverse, and also contraction on exposiire to light. 



161a. . Recherches experimentales sur la vision 



cliez les Arthropodes. Bull. Acad. Belg., xiv. (1887), 

 pp. 407, 545 ; xv., p. 28. 



162. PoucHET, G. De I'influence de la lumiere sur les larves des 



Dipteres privees d'organes exterieurs de la vision. 

 Rev. et Mag. de Zool., 1871-72. 



163. PouLTON, E. B. Colour Relation between Larva of >SW7'm- 



thus ocellatus and its Food-plants. Proc. Roy. Soc, 

 xl. (1886), pp. 135-173. Colour of Pup^e, Trans. 

 • Entom. Soc, 1886, pp. 46-48. 



The influence of surrounding colour on Lepidopterous larvss 

 is real, but can only be explained by a complicated 

 physiological and apparently nervous circuit. 



154, _ . An Enquiry into the cause and extent of a 



special Colour-relation between certain exposed Lepi- 

 dopterous pupse and the surfaces which immediately 

 surround them. Proc. Roy. Soc, xlii. (1887), pp. 

 94-108. Cf. Proc Zool. Soc, 1887, pp. 191-274. 



165. . Further Experiments upon the Colour- 

 relation between Phytophagous Larvae and their sur- 

 roundings. Rep. Brit. Ass., 1887, p. 756. 



166. Pringsheim, N. Sur Taction de la lumiere et la fonction 



de la chlorophyll dans le plante. Revue Botan., xxvii. 

 (1880), etc 



167. Sachs, J. v. tjber den Einfluss der Luftemperatur und 



des Tageslichts auf das Langenwachsthum. Arb. bot. 

 Inst., Wiirzburg, 1872. 



