488 Proceedings of the Royal Physical Society. 



152. Graber, V. tjber die Helligkeits-und Farben-empfind- 



lichkeit einiger Meertliiere. SB. Ak. Wiss. Wien, 

 xci. (1885), pp. 129-150. 



153. Heron -RoYER. Observations comparatives sur le de- 



veloppement externe et I'etat adulte des Batraciens 

 du genre Bombinator. Bull. Soc. Zool. Fr., xii. (1887), 

 pp. 640-655, 2 pis. 



Quickened the development of larvse by prolonged (by lamps) 

 conditions of daylight. 



154. Herrmann, L. (See under Electricity.) 



Effect of darkness on tadpoles (pp. 418, 419). 



155. HiGGlNBOTTOM, J. Influence des agents physiques sur le 



d^veloppement, etc. J. de Physiol., ii., p. 625. 



156. Krukenberg, C. F. W. Yergleichend - Physiologische 



Vortrage, iii. Grundziige einer Yergleichenden 

 Physiologie der Farbstoffe und der Farben. Heidel- 

 berg, 1884, pp. 85-184. 

 Effect of light on pigment-forming, p. 90. 



157. M'Aldowie, a. M. Development and decay of pigment 



on birds' eggs. J. Anat. Physiol., xx. (1886), pp. 

 225-237. 



Coloration varies in direct ratio to amount of light to which 

 the eggs are exposed. 



158. Packard, A. S. On the Cave Fauna of North America, 



with remarks on the anatomy and origin of blind 

 forms. Abstr. in Am. Naturalist, xxi. (1887), pp. 

 82, 83. 



158a. Patten, W. On the Eyes of Mollusca and Arthropods. 

 MT. Zool. Stat. Neapel, vi. (1886), pp. 542-756, 5 

 pis. 



Inter alia, notes on the origin of eyes in Protozoa, and their 

 original trophic (heliophagous) influence. 



159. Pelseneer, P. Zoology of the " Challenger." Eeport on 



Deep-Sea Mollusca, 1888. 



Detailed discussion of forms in relation to their conditions of 

 life, more particularly of the rudimentary organs of 

 vision in the absence of light. 



