A 
- 
662. ` General Notes. [July, 
3-30 got rid of the second accentor. In this case poetical retri- 
bution was wrought, for while one of the turned-out accentors 
was placed in a white-throat’s nest, and cared for by its foster 
parents, the young cuckoo was about a week afterwards found 
dead at the bottom of the nest. 
Mammalia—Dr. C. H. Merriam has reported to Science the dis- 
covery of an Aplodontia, show’tl or mountain beaver, which he 
believes to,be sufficiently distinct from the ordinary form to take 
| BMBRYOLOGY.! 
, THE EARLY DEVELOPMENT OF JuLus TERREsTRIS.’"—The eggs of 
F. terrestris are oval, white and covered by a thick chitiaous 
chorion ; the nucleus is embedded in a mass of protoplasm in the 
center of the egg. This central mass of protoplasm is irregular 
in shape, but its long axis corresponds with that of the egg. From 
it anastomosing processes radiate in all directions, forming a net- 
work throughout the egg, in the meshes of which the yolk- 
spherules are contained. The nucleus is not a distinct vesicle, 
but its position is marked by chromatin granules, and there 1s no 
nucleolus. 
1 Edited by Jonn A. RYDER, Smithsonian Institution, Washington, D. C. _76. 
» M.A. Proc. Roy. Soc, London, Vol. XL, No. 242, PP. T i 
1886.) n 
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