482 Proceedings of the Royal Physical Society. 



100. Platner, G. Zur Bildung der Geschlechtsprodukte bei 



Piilmonaten. Arch. mikr. Anat., xxvi., pp. 599-621, 



2 pLs. 

 The rapid growth of the ova hi herraaphrodhe duct of Arion 

 is the .natural result of the direct supply of abundant 

 food ensured by their peripheral position. 



101. PouLTON, E. B. Notes upon Lepidopterous larvae, etc. Tr. 



Entom. Soc, 1887, Part iii., pp. 281-321. 



Relation between phytophagous larvse and various species of 

 food-plant. Origin of Carnivorous habits. (Light- 

 seeking, appreciation of gravitation, etc.) 



101a. Rolph, W. H. Biologische Probleme. Leipzig, 1884. 

 p. 238. 

 Relation of nutrition and reproduction (Chaps, iv. and vi. ). 



102. Seeland, v. (No init.). XJber die Nachwirkung der 



Nahrungsentziehiing auf die Ernahruiig. Biol. Cen- 

 tralblt., vii., pp. 145-158, and four following Nos. 



Experiments with fowls, etc. 



103. Semper, K. Op. cii. 



Records abundant instances of influence of food. Influence 

 of parasitic environment (in part nutritive) on parasites. 



104. Sutton, J. B. Hypertrophy, its value in Evolution. Proc. 



Zool. Soc, iii. (1885), pp. 432-445. 



105. . General Pathology, 1886. 



Hypertrophy is one of the causes of the differentiation of 

 separate sexes from primitive hermaphroditism. "Re- 

 production in vertebrata, so far as is known, is impossible 

 unless hypertrophy of one set of organs occur." 



lOG, Ward, Marshall. On the Sexuality of the Fungi. Quart. 

 J. Micr. Sci., xxiv. 



Tlie relation between degree of parasitism and degree of 

 asexuality. 



107. WiLCKENS, M. Untersuchungen iiber das Geschlechtsver- 

 haltniss und die Ursachen der Geschlechtsbildung in 

 Haustieren. Biol Centralblt., vi. (1886), pp. 503-510. 

 Landwirth. JB., xv., pp. 607-610. 



Better uterine nutrition tends to produce female offspring. 

 First and young mothers (better nutrition) tend to bear 

 females. 



