1880.] Zoölogy. 593 
any of the British Polar Expedition for 1875-1876. 
Engler, of Kiel, has published the first part of an essay on the 
evolution of the vegetable kingdom since the Tertiary period, 
under the title, “Versuch einer Entwicklungsgeschichte der 
Pflanzenwelt.” It relates to the extra-tropical regions of the 
Northern hemisphere, . H. Miller contributes to Kosmos 
an interesting critique of Gaston Bonnier’s essay on the nectaries 
of flowers which was written in opposition to recent doctrines of 
the evolution of flowers. Messrs. Sereno Watson and C, S. 
Sargent are botanizing in Northern California and Western Ore- 
gon this summer, while Mr. Vasey, a son of Dr. George Vasey, is 
studying the trees of Southern California for the Forestry Report 
of the tenth census, Mr. E. L. Greene is herborizing in Southern 
California, Arizona, and New Mexico. We have two interesting 
papers from him which have been crowded out unfortunately for 
want of space. 
ZOOLOGY. ! 
TARDIGRADES AND Ecos.—Having found several specimens of 
Tardigrades during the past month, I have been fortunate enough 
to confirm what has been observed in Europe in regard to their 
peculiar manner of depositing their eggs. mong them was one 
which contained within the body, as nearly as I could determine, 
six spherical masses, which, when examined with higher power, 
appeared to be collections of eggs. It was in the act of molting, 
the old skin having slipped back so far as to set free the three 
Figs 
Fic. 1—Normal individual seen from above. Fic, 2.—Individual with egg sack 
asa The embryos can be seen within the eggs. FIG. 3.—Enlarged view of 
Oot. 
anterior pairs of limbs, while the posterior pair was plainly seen 
Moving within, The skin was empty with the exception of a 
‘The departments of Ornithology and Mammalogy are conducted by Dr. ELLIOTT 
Cougs, U.S. A. 
