THEORY OF EVOLUTION. 
Gen.. Sub. 15 
Lucas, A. H. S. On the Production of Colour in Birds’ Eggs. Tr. R. 
Soc. Yict. xxiv, pp. 52-60. 
The protective value of coloration. The author considers that the 
influence of the surroundings, during the time of the formation of the 
shell, upon the mental or nervous constitution of the mother bird, is an 
important factor in determining the coloration. 
Luciani, L., & Piutti, A. Arch. Ital. Biol, ix, pp. 319-358, X pi. 
The influence of various environmental conditions on the respiratory 
phenomena of the ova of Bombijx viori. 
Ritzema-Bos, J. Untersuchungen iiber Tylenclms devastatrix, Kuhn. 
H. Mith. Biol. Central bl. vii, 21, pp. 646-659. 
The influence of low temperature in producing “latent life.” 
. Aenderungen in der Nahrung bei einigen Saugetieren. Op. cit. viii, 
15. 
Thomson, J. Arthur. Synthetic Summary of the Influence of the 
Environment upon the Organism. P. R. Phys. Soc. Edinb. ix, 
pp. 446-499. 
An appendix to Semper’s “ Animal Life,” with more recent researches ; 
an analysis of the external factors ; a classified review of the facts j the 
physiological and aetiological aspects of environmental influence. 
White, W. Colour-relation between Pupse and their Surroundings. 
Tr. E. Soc. ii,’pp. 247-267. 
Experiments by G. 0. Griffiths, independently corroborating Poiilton’s 
results. • 
3. Heredity. 
Bonnet, R. Dio stummelschwanzigen Huude im Hinblick auf die 
Vererbuug erworbener Eigenschaften. Yerh. Anat. Ges. ii, in Anat. 
Anz. iii, pp. 584-60G. [Cf. Beitr. path. Anat. (Ziegler and Nauwerck) 
iv, pp. 69-92.] 
Clearly shows the necessity of caution in using such cases as arguments 
for or against Weismann’s position. Apparently transmitted curtailing 
the result of an excessive progress in a normal tendency to reduction of 
the caudal vertebras. 
BoulengeR, G. A. On the Scaling of the Reproduced Tail in Lizards. 
P. Z. S. iii, pp. 351-353. 
The aberrant scaling of the reproduced tail is a reversion to an ancestral 
form. 
Boveri, Th. Zellen-Studien. Heft. n. Jen. Z. Nat. xxii, pp. 685-882, 
5 pis. 
Of the four chromatin loops observed in the division figure of the two 
first segmentation cells, it is probable that two are derived from the male 
(spermatozoon), and two from the female (ovum) nucleus. 
