164. SOME MARINE ALGH FROM NEW ZEALAND. 
as long as the main stem. The angles of the branches with the 
main stem are very acute. Each branch is slightly curved 
e ; 
sporangia arise in clusters secundately on the inner sides of the 
branches near their point of origin. The basal cell of the common 
pedicel is considerably broader than the rest. The tetraspores are 
cruciate, and innovati 
and Harvey, Lond. Journ. Bot. iy. p. 272.—This rare and distinct 
species occurs in the present collection as an epiphyte. The 
closely-packed subulate simple pinnule, arising in pairs from every 
joint, compel place it in the genus Antithamnion. The 
plants bear tetraspores secundately arranged on the inner side of 
the bases of the ultimate pinnules. 
OsPoRIUM Brovunianum Harv. Gibs. ; Callithamnion Brouni- 
irvey, L'rans. Roy. Ir. Acad. xxii. p- 561.—T wo specimens of 
this species have been sent me, one with sexual, the other with asexual 
ruit. On comparison with the specimens in the herbarium of the 
always, when ture, more than four ; ec ar 
quite those of the genus Pleonosporit m not those of a true 
Callithamnion Further, the cystocarpia, both in the specimens 
from Port P lip New Zealand, are 
from other members of the genus in that the primary axis is 
falsely corticated with downwardly directed branches, giving the 
er 
.e 4 FORMOSIssima . Mont.— Several very fine specimens, 
plentifully tetrasporic, occur in the present collection. According 
to Sonder: (Linnea, 1858, p. 514), this species is only a variety of 
P. coralloidea J. Ag, Agardh himself (Epic. p. 79) remarks, “ Neo 
