iS6 Phillips . — On the Development of the 
thirty-nine genera into eleven groups ; Schmitz (3), forty-one 
genera into seven groups. I have therefore been desirous of 
extending my observations to others of these groups, for the 
purpose of ascertaining what variations, if any, in the structure 
of the cystocarp occurred within the limits of this exceptionally 
large family. 
I have not found it possible to successfully make out the 
structure of the procarp from herbarium-material, and my 
investigations have therefore been limited to those genera 
which are represented in the flora of the coasts of North 
Wales, and of which I could collect material for myself. 
The group Laurencieae, Schmitz, is represented in this 
district by three species of the genus Laurencia , Lamx., viz. 
L. pinitatifida , Lamx., L . hybrida , Lenor., and L. obtusa , Lamx. 
After some delay I have collected procarp-bearing material of 
the first-named species. Considering the abundance of the plant 
along the coast, the female plants seem to be very infrequent. 
The male plants are more common, but the great majority of 
the plants consist of individuals bearing tetraspores. Of the 
other species I have not yet been able to find female plants 
at all. To the apparent non-occurrence of cystocarp-bearing 
plants of L. obtusa , Harvey (4) has already directed attention. 
I have examined the procarps of L. pinnatifida with the 
greater interest, because the genus Laurencia is altogether 
excluded from the Rhodomelaceae by Agardh, and retained 
in the family Chondrieae (5), from which he had, however, 
already removed the genus Chondria itself under the name 
Chondriopsis. Schmitz has divided the family Chondrieae 
Ag. into two groups of genera, one of which, including 
the genus Laurencia , is transferred to the Rhodomelaceae, the 
other group constituting the family Bonnemaisoniaceae. 
The group Dasyeae is also represented in the district by at 
least three species of Dasya , viz. D. coccinea , C. Ag., D. arbus- 
cula , C. Ag. ; and D. ocellata , Harv. Dasya coccinea is common, 
and bears abundant cystocarps. To the examination of this 
species I have given considerable attention, and I propose to 
describe the development of its cystocarp in some detail. 
