NOTICES OF BOOKS. 151 
* 
plants, however, it was found that - bearing sceds solitary in 
each cell had a rather more extensive average range than those with 
seeds two or more in the cell ; and this proves to be likewise the case 
on the Gouliyent: 
Spe Average, 
3595 “with” pst solitary in each cell . 2:66 
2988 or more seeds in each . -« 2°55 
the con — presented by Continental plants, divide 
ssbonttag to the nature of their testa, is similar to that by British 
The highest average is attained by those species in which thi er 
coat is ee ey follow those which ave it thin or mem- 
Sak eg ae 
Average. 
“bate with testa thin or membranous A ft 208 
006 ,, 4, soft, cellulose, &c. . Nr ie be 
Ec eles ial k, hard, or crustaceous . 2°49 
(Zo be continued.) 
otiees of Books. 
: Pror. Srrassureer’s ResEaARCHES oN gine 
Veber zalitdeng und Zelltheilung. By E. Srerassurezr. (Sur la 
fo et la division des Cellules. French tranelation by Jzan- 
J. outta CKX). 
Studien ueber Protoplasma. By the same. Jena. 1876. 
(Tas. 188. 
In the first of these works Prof. Strasburger ooords. the results of 
c r 
lating to the origin of the Coniferous eno, at to the various 
phases ‘of bias Pia in the nile of ria orthos 
The oosphere, or central cell of the corpusce moka (ci (egg) of Stras- 
burger of Ep hedra altissima contains, just before fertilisation, granular 
ese on the 
ll, itself resulting fro erior division of the nucleus, is found at 
the ext he frothy protop 
the pollen-tube applies itself to the disarranged opervaley ~ (fig. ee 
The nucleus now disappears, and the sg ecom 
certain places, which are often arranged parallel to “the e ongitudinal 
axis of the corpusculum (fig. 2*). Round pein ‘of 
which, at first homogeneous, soon show diffe; rentiation aie a nucleus : 
