14 ANNUAL REPORT OF THE 



"Sensory appropriation, as illustrated by the organs of taste in 

 vertebrates" at the centennial celebration of the founding of the 

 Philadelphia Academy of Natural Sciences, and in May he gave 

 an address before the Biological Club of Trinity College, Hart- 

 ford, on "The nature of the primitive nervous system." 



The Zoological Club held twenty-four meetings, at which twenty- 

 two original papers and fourteen reviews were presented. 



Publications. August 1, 1911-July 31, 1912. 



Contributions from the Zoological Laboratory. 



224. Mark, E. L., and Long, J. A. — Studies on early stages of 



development in rats and mice. — II. Die reifung der eier 

 der maus. Verhandl. VIII. Internal, zool. kongr. zu Graz, 

 August, 1910, Jena, 1912, p. 401-408. 



225. Mark, E. L., and Long, J. A. — Studies on early stages of 



development in rats and mice. — III. The living eggs of 

 rats and mice, with a description of apparatus for obtaining 

 and observing them. By J. A. Long. Univ. of California 

 publ. Zool, 23 February, 1912, vol. 9, p. 105-136, pi. 13-17. 



226. Parker, G. H., and Parshley, H. M.— The reactions of 



earthworms to dry and to moist surfaces. Journ. exp. zool., 

 20 November, 1911, vol. 11, p. 361-364. 



227. Day, E. C. — The effect of colored light on pigment-migration 



in the eye of the crayfish. Bull. M. C. Z., December, 1911,. 

 vol. 53, p. 303-344. 



228. Congdon, E. D. — Effects of radium on living substance. — L 



The influence of radiations of radium upon the embryonic 

 growth of the pomace-fly Drosophila ampelophila, and upon 

 the regeneration of the hydroid Tubularia crocea. BulL 

 M. C. Z., February, 1912, vol. 53, p. 345-358. 



229. Congdon, E. D. — Effects of radium on living substance. — II. 



Comparison of the sensitiveness of different tissues in the 

 dung-worm Allolobophorafoetida, and in the crayfish Cambarus- 

 affinis to the beta rays of radium. Bull. M. C. Z., February, 

 1912, vol. 53, p. 359-368. 



230. Kukenthal, W. — On the hair-like appendages in the frog 



Astylosternus robustus (Blgr.). Bull. M. C. Z., February,, 

 1912, vol. 53, p. 369-376, 5 pis. 



