Ser. RHoposPERME. (Supplementary.) 
Puate CCCLVII. 4. 
FURCELLARIA FASTIGIATA, Zamour. 
(For description, &c., see PLatz XCIV.) 
My remarks appended to Pl. XCIV. had scarcely been made 
public when I received from Mrs. Griffiths specimens of F. fas- 
figiata in’ both kinds of fruit, which I regret had not reached 
my hands in time to withhold both that plate, of which the 
analytic figures 3 and 4 are incorrect, and the remarks appended 
to it, so far as they refer to the fructification. 
Dr. Caspary has given, in the Annals of Natural History 
(Second Series, vol. vi. p. 87),a minute account of the compara- 
tive structure of Furcellaria and Polyides, with micrometric 
measurements of the cells composing the various strata of their 
fronds; but it is due to Mrs. Griffiths to state that she has long 
been perfectly well acquainted with the fructification of Furcel- 
laria, figures of which I now give in detail. 
Fig. 1 represents a cross section of one of the pod-like 
branches, of which fig. 2 is a longitudinal cutting. Fig. 1 shows 
five favelle formed from the large cells immediately in contact 
with the fibro-cellular axis. In fig. 2, two of these favellz are 
shown, prolonged by several superimposed favelle having 
become confluent, as is almost always the case in fully ripe 
specimens. Fig. 3 is a small transverse slice, to show the cells 
more highly magnified ; fig. 4 represents some spores separated. 
Fig. 5 is a transverse segment of a frond producing fetraspores, 
which are formed in several rows (according to age) from the cells 
of the middle stratum most distant from the axis. These ¢efra- 
spores (fig. 6) are pear-shaped and transversely zoned. 
I am indebted to Mrs. Griffiths for numerous and beautiful 
specimens of both kinds of fruit in the most perfect state. - 
wo 
a 
VOL. III. 
