СЕВАМТОМ 157 
CERAMIUM MINIATUM Suhr; J. Ag. Sp. Alg. 2: 135. 1851; 
Anal. Alg. Cont. 2: 18. 1894 
On Prionitis decipiens, Chincha Islands, June 18, 1907, Coker 
104 p.p.; also in the same locality, July 13, 1908, Coker 402 p.p. 
A minute repent plant with an obviously dorsiventral and 
bilateral thallus. We have not been able to examine authentic 
specimens, but from Agardh’s descriptions of C. miniatum we 
think it probable that Dr. Coker’s plants are referable to this 
species. Agardh originally attributed it to the coast of Peru and 
stated that it was parasitic on other algae. Later he seems to 
have had doubts as to the place of origin of Suhr’s original speci- 
men, noting that Suhr wrote “Collao” (not Callao) and that the 
plant was adnate to a Gelidium which he believed to recognize 
as a species of the Caribbean Sea. It may be remarked, however, 
that Suhr had other algae from Peru (е. g. “Solenia bulbosa” and 
“ Halymenia glaphyra") and also that Prionitis decipiens, the host 
of Dr. Coker’s Ceramium, was originally described by Montagne 
as a Gelidium. U 
It is doubtíul if the repent Ceramium from Australia (on 
" Melanosperms”) figured by Harvey (Phyc. Austral. 4: pl. 2064) 
as Ceramium miniatum Suhr is really that species. At least, it 
seems different from the plants collected by Coker, being larger, 
with more involucrate, more terminal cystocarps, more globose 
sporangia, less obvious bilaterality in the arrangement of the 
corticating cells, etc. In Harvey’s perhaps too schematic figures, 
the protoplasts of the uncorticated internodal cells are represented 
as cylindrical, while in Coker’s plant they have that appearance 
only towards the base, being for the most part rhombic-ovate in 
optical section, becoming rhombic-lenticular towards the apices. 
We have seen only three or four cystocarps, which are about 110 y 
in diameter and appear to lack special involucral bracts; the 
antheridia cover the terminal branchlets almost continuously and 
are found occasionally at some of the lower nodes; the sporangia 
are distichously biseriate, ellipsoid, ovoid, or obovoid, and are 
mostly 48—61 и long and 35-50 и wide. The main filaments are 
55-68 и broad, becoming 27-14 и towards the apices. The lowest 
segments instead of being shorter than broad, as described by 
Agardh, are twice as long as broad, as figured by Harvey for the 
