310 Serentific Intelligence. 
coccus nivalis and pluvialis is made out ; at least it is shown that 
of t A 
aes name of Fan cacomcnies is preferred, on good grounds: 
the 6 specific name adopted is dacustris, Girod-Chantrans having 
well investigated the plant and ficured and described it, under 
the name of Volvow lacustris, so long a 
and the beginning of the present century sae 97, pte Heemato- 
coceus propagates by two — of zoospores; i. e. sometimes by 
large and ordinary ones, resulting from as thai division of the con- 
tents of the cell or plant ‘site ras daughter-cells, each of which 
is transformed into a zoospore of somewhat complicated struc- 
ture ; while other individuals adits their contents into about 
32 microzoospores The development of both kinds of zoospores 
into the plant has been observed by Rostafinski. ‘he develop-. 
ment is pe Velter’s supposed discovery of the copulation 
of the large zoospores is discredited and explained away. Rosta- 
finski concludes that Heematocoecus is devoid of sexual reproduc- 
oree of DeBary ie caine. Satara ia, (ado oe 
nium, ee ., to which Rostafinski adds Volvox and “Budorina) 
here the fecundation is by antheroroids and ae And he 1s 
disposed to take Hiematocoecus as the type of a fourth tribe, 
Agamee, propagating Pctetagrenaee y spore a:* 
Jatalogue of Plants growing iss cultivation within 
thirty miles of Amherst College ; by Evwarp —_- A 
and Cnartes Frosr, M.A. Amherst, 1875. pp. 98, 8vo—The 
Ly wer Cryptogamia, exclusive of the Lichenes, are by Mr. ‘Frost. 
They fill half the Cata logue. Prof. Tuckerman contributes an in- 
teresting preface. The C Catalogue ‘bears marks of the scrupulous 
accuracy and neatness of finish which characterize all of Pro f. 
Tuckerman’s work, the simplest, no less than the more elaborate; 
and the arrangement, typography, and paper, are of corresponding 
excellence. We venture to correct a correction. We are told at 
the close to “read Calystegia Sepiun”; but we prefer to read as 
nor ar 
detected in the district which would not have been ex} 
are not before recorded. Blephiliu ciliata is the most noteworthy 
of these. We are curious to know how many species this model 
catalogue contains, and count it an oversight that the number 1 
