Botany and Zoology. 309 
fertilized at all. Some years ago I examined hundreds of speci- 
mens as they were fertilized by bees. The stigma closes up after 
e 
only slowly, but I think it moves back in a few seconds. ave 
examined no specimens lately with special reference to this point. 
The stigmas of Mimulus ringens are curved out like those of the 
Martynia, and project beyond the anthers. I have seen small na- 
lus luteus and Mimulus moschatus, and likely other species, close 
h oma radicans an 
SS 
our larger common bladderworts, has a yellow irregular flower 
which considerably resembles that h 
stigmas act much as in Martynia. The lower lip of the stigma is 
2. On the theory of Evolution : by Prof. Corr. (Proc. Acad. 
Nat. Sci, Philad., F eb., 1876.)—Prof. Cope gave a histor of the 
Wer of the doctrine of evolution of animal and vegetable types. 
i e 
fou ng Important additions at the same time. T 
ae the variations of species to be the primary evidence of evo- 
“erie by descent. Darwin enunciated the law of “natural selec- 
— 48 a result of the struggle for existence, in accordance with 
tiny “the fittest” only survive. This law, now generally ac- 
Pt 18 Darwin’s principal contribution to the doctrine. ee 
rever, has a secondary position in relation to the origin 0 
Dattion, which Lamarck saw, but did not account for, and which 
“natural etek — in order to have materials from which a 
selection” can be made. 
See sa, — XII, No. 70.—Ocr., 1876, 
