1902) CURRENT LITERATURE 169 
Upper part of the egg becomes mucilaginous and presses upon the neck cells 
from beneath, while an outgrowth from the pollen tube presses from above 
and forces its way into the egg. In Seguoia sempervirens the round male 
_ fell becomes elongated, one figure showing it spirally wound, but this may 
not be the normal form. In Taxodium, however, the spiral form is the usual 
_ one, and this is probably the case in Cupressineae also. The form is prob- 
ably due to the narrow entrance, the male cell having a greater diameter 
oe than the neck of the archegonium. The behavior of the chromatin during 
fertilization is not described. 
In Sequoia sempervirens the sex nuclei fuse at the middle of the arche- 
» the base of the 
: Two or three tiers are organized, the lower one or two tiers forming the 
7 a the tier next above the suspensor. 
Pe dad agrees with Strasburger’s account of Juniperus, except that the 
: atc. described. Cunninghamia agrees with Taxodium, Crypto- 
but enough we upressineae. In Sciadopitys the series was very incomplete a. 
« 8) Was obtained to show that the embryology is very peculiar. The == 
g¢ found shows four free nuclei at the base of the archegonium, = 
Abietineae. A later stage shows a “rosette,” suspensors, anda 
of embryonic cells. The lowest of these cells form the embryo, 
above develop into a second set of suspensors, still leaving some : 
nic cells between the two suspensor systems. Thefiguresbear 
Crane to Strasburger's figures of Araucaria, but in Strasburger’s a 
Which — set of suspensors, as described by Arnoldi, form a cap - 2 
~Detween the «... » while the part between the two suspensor systems—Or = 
ie Semel and cap—develops into the embryo. Arnoldi believes - - 
pecies of Sequoia should constitute a family, the Sequoiaceae 
hee 
» Cryptomeria, and perhaps Cunninghamia should be included 
ace and that Sciadopitys is best regarded as constituting : 
ec F ae.— CHARLES J, CHAMBERLAIN. > 
has published a detailed account of the remarkable fossil : 
aad pees of fossil plants from the paleo: zoic rocks. Iv. 
von of Lepidocarpon, a genus of lycopodiaceous cones from 
formatio ation. Phil. Trans. Roy. Soc. B. 194: 291-333- pls. 38-43- 
. 
