68 BOTANICAL GAZETTE [JANUARY 
was fully cognizant. We reserve further comment upon this matter until the — 
publication of Dr. Russell’s paper, of which advance sheets have reached ts _ 
—J.C.A. 
THE Journal of Botany” has reprinted from the 15th Ann. Rep. of the 
Fishery Board of Scotland some observations by Mr. George Murray on the — 
plankton of the west coast of Scotland. Mr. Murray finds the bulk of this — 
free-floating vegetation to consist of about ten species of diatoms and a fe 
Peridinez. In the early months of the year diatom life prevails, reaching 
its maximum aboat the first of April; in the latter part of the year Peridiner — 
forms predominate, culminating in August. During the entire year the most 
favorable zone for diatom development was at a depth of five fathoms, 
the prominent exception of Ske/etonema costatum, which was practically cot 
fined to the surface in March and April. Mr. Murray’s observations go 
prove that small crustacea live almost entirely upon diatoms. Such sp 
as have spines, and the Peridinez forms, do not serve apparently as- daily 
food for the lower forms of animal life. Besides the ordinary division and 
the formation of auxospores, reproduction of diatoms by means of endo- 
genously formed spores or endocysts was observed. In some cases as mal 
as sixteen of these reproductive bodies were produced in one diatom, and 
summer they were found with unsilicified membranes, dissociated from # 
parent and undergoing further division. Later in the season forms like t 
parent reappeared.—H. W. L 
7 
L. A. GAYET™ has recently completed a monograph on the : 
ment of the archegonium in the bryophytes. The article occupies 
one hundred pages and sets forth the results of six years’ work. A 
the most important points are as follows. 
oosphere. There are also observations on the pedicel cell, the nut 
neck canal cells, and the number of longitudinal rows in the neck. 
are occasionally two ventral canal cells in Spherocarpus. In one case 
ventral canal cell of Marchantia was fertilized instead of the oosphere- 
The development of the archegonium of the Anthocerotez is 50 dif 
from that of other bryophytes that the author makes the Anthocerote® | 
Sroup coordinate with Hepatic and Musci, and places it, not in its 
© Jour. Bot. 35 : 387-395. 1897. 
**Recherchés sur le — de l’archegone chez les Muscinees- “An? 
Bot. VIII, 3: 161-258. 
