1905] CURRENT LITERATURE 237 
all of the eee formations of the stem supply oo organs.—M. A. 
CHRYSLE 
tae has published further additions to the Cretaceous flora of Long 
Island, treating of plants from the Northport Clays and from the vicinity of 
Hempstead Harbor, Oyster Bay, and Montauk Point. Nine new species, includ- 
ing an interesting form of Marsilia, are described. The supposed palm Serenop- 
sis is reconsidered in the light of better material and is definitely referred to Ne- 
Jumbo. This leaves a species of palm (about to be published by the undersigned 
in Torreya) coming from the mid-Cretaceous of Delaware and Maryland, as the 
earliest known plant of this type from American strata.—EDWARD W. BERRY. 
NrwcomBE,*° in his presidential address before the Michigan Academy of 
Science, contrasts the old and new types of biological surveys, and makes a strong 
appeal for the new progressive and definite survey of the ecological type, accom- 
panied by detailed maps, such as has been carried on by FLAHAULT in France, 
by the SairHs in Britain, and begun in Michigan by Livincston. Concise 
statements are made concerning the uses of such a survey, both scientific and 
practical. It is much to be hoped that the plan here advocated will be carried 
out, not only in Michigan but in many other states as well.—H. C. Co 
LAWRENCE gives the results of his investigation of the apple scab in Wash- 
ington. 4 He was able, as were CLINTON and others, to confirm the discovery made 
by ADERHOLD, that Fusicladium dendriticum, found as a parasite on the fruit 
and-leaves of the apple during the summer, is but a stage in the development of 
Venturia inaequalis, the perfect form being found on the dead leaves as a sapro- 
phyte during the winter. He recommends that the fallen leaves should be gath- 
ered and destroyed and that the usual highs with Bordeaux mixture be con- 
ducted in the spring —E. Mrap Witc 
CHEMOTAXIS of the sperms of .. toward a number of albumins, 
ea nucleo-albumins, proteids, and enzymes, is the subject of a paper by 
by Lrprorss.4? Out of nineteen substances tested only two gave a negative 
sce et the others attract the sperms when in the right concentration. The 
author suggests that proteid substances are probably the main factor in the attrac- 
tion of such sperms to the archegonia in nature, as well as in the tropism of pollen 
ay There is some evidence that Marchantia sperms are positively aerotropic. 
—B. E. Livincston. 
39 HoLicx, A., Additions to the paleobotany of the cretaceous formation on Long 
Island. II. Bull. N. Y. Bot. Gard. 3:403-418. pls. 70-79. 1904. 
4° Newcomsr, F. C., A natural history survey for Michigan. Annual Report 
Mich. Acad. Sci. 6: 28-36. 1904. 
4 LAWRENCE, W. H., The apple scab in western Washington. Bull. Wash. Exp. 
Stat. 64: 1~24. Sis I-5. pl. I-2. 1904. 
“ Liprorss, B., Ueber die Reizbewegungen der Marchantia-Spermatozoiden. 
Jahr. Wiss. fie 41: oe he. 1904. 
