A. W. Hill. 69 
NOTE ON A SPECIES OP CHARA WITH A SPINOUS 
CORTEX. 
By Arthur W. Hill, M.A. 
[Thxt Figs. 68—73.] 
1 1 HE development of the cortical covering of the internodal cells 
of Cham by means of up-growths from the lower node 
meeting cells which grow downwards from the nodal tissue above 
has been thoroughly described by Sachs and Migula. A reference 
to the figures of Cham fragilis in Sachs’ Text-Book or to the figures 
of cortex development in Rabenhorst’s Kryptogamen-Flora will 
obviate therefore any detailed description. 
The cortex of the specimen, which forms the subject of this 
note, agrees generally with that of Cham fragilis in that the 
“ middle rows ” of nodal and internodal cells are separated from 
Medina longitudinal section of a young internode (.1), with the cortical 
lobes developed from the nodes (N) already divided up into nodal (11) 
and internodal cells (i). The latter have produced head cells (K) by 
division and on these the spines (S) are borne. 
