480 Proceedings of the Royal Physical Society. 



86. Gruber, a. Beitrage zur Kenntniss der Physiologie und 



Biologie der Protozoen. Ber. Freiburg Ges. I., Heft 

 ii, 1886. Ann. and Mag. Nat. Hist., xvii., pp. 

 473-494. 



Spontaneous division occurs at optimum of growth, or in 

 rapid succession with diminution of size in unfavourable 



conditions. 



87. Hoffmann, H. tJeber Sexualitat. Botan. Zeitung, 1885, 



Nos. 10, 11. 



Inter alia, connection between deficient nutrition and male- 

 ness. 



88. . Yererbung erworbener Eigenschaften. Biol. 



Centblt., vii., 21 (1887), p. 667. 



89. . Kulturversucben iiber Variation ira Pflan- 



zenreiche (1855-87). Botan. Zeitg., 1887, pp. 260, 

 772, 773. 



Minus nutrition alters flower of Papaver, Nigella, Lamium, 

 etc., and change is transmitted. Nutritive changes 

 hereditarily affect root of Daucus carota, and period of 

 blossoming of Solidago, etc. 



90. Jaworowski, a. Multiplication endogene des cellules. 



Arch. Slav. Biol., i. (1886), pp. 641-651. 



Paedogenesis due to rupture of incompletely developed ovarian 

 membrane and the liberation of ovules into the body- 

 cavity, where, in richly nutritive environment, they are 

 able to develop without fertilisation. 



91. Keller, C. Die Wirkung des Nahrungsentzuges auf Phyl- 



loxera vastatrix. Zool. Anz., x. (1887), pp. 583-588. 

 Stoppage of nutrition causes the parthenogenesis to cease. 



92. Krukenberg, C. F. W. Vergleichend-PhysiologischeStudien, 



ii, 1882. 



Effect of food on colour (c/. Semper). 



93. . Vergleichend - Physiologische Vor- 



trage, v. Grundziige einer Vergleichend Physiologic 

 der contraction Gewebe. Heidelberg, 1886, pp. 273- 

 394. 



On fasting in connection with the formation of reproductive 

 elements. Cites F. Miescher-Riisch on the Salmon, pp. 

 305, 306, 383. 



