164 THE JOURNAL OF BOTANY 
diametro ee vel sesquilongioribus, articulis ramulorum 
diametro brevioribus 
Dr. E. seit ‘Wright has been so kind as to send me a 
fragment of an authentic specimen collected by C. Wright in the 
United States North Pacific Exploring Expedition, 1858-6. An ex 
amination of a transverse section of this shows four large peticentral 
cells; and alternating with these are four much smaller subsidiary 
cells. The cell-walls are thick, In the branches these subsidiary cells 
and in the branc pe , as in Harvey’s specimen, they are altogether 
bg rns ae 
f the cei of the Wei-hai-wei gevering 4 is in cysto- 
23. P. urcEoLaTA Grev.? Wei-hai-wei, Boyden ! 
These plants have all the appearance of P. urccolata Grev., but 
as they bear neither tetraspores nor cystocarps, it would be unsafe 
to make of this gathering a new record for the North Pacific in the 
geographical disteibation of the species. They differ from the 
deseriptio n of P teri Hariot me their mode of branching, and 
hey are i cipigtie on any other al 
24 ar D. Geallibe Harv. Wei-hai-wei, Boyden ! 
This ora is but a eect, and bears antheridia only. 
25. Ceramium Boydenii, n. sp. Fronde tota corticata, ad 
5 em. alta, vage ro sparsim dichotome ramosa, ramis plus minus 
laxe intricatis et inter se hic illic radicellis valde adfixis, ramulis 
numerosis et ad quemque nodum pro majore parte egredientibus, 
"25- 
mm. longis, simplicibus aut vage divisis obsita; articulis quam 
apavnate ro multo brevioribus vel parum longioribus. Ramulorum 
sporangiferorum apicibus capitatis, sterilium non forcipatis. Tetra- 
a: ru gions : 
s ra i margin 
tis, nunc cruciatim, nunc triangule divisis. Cystocarpia ignota, 
Wei-hai-wei, Boyden ! eee Japan, Petersen ! 
Sckchieus, Japan, Kjellman! Vega Expedit 
is species is named in honour of the Swaide, Dr. P. Hamilton 
He was unfortunately only able to procure a small 
— of it, and on subsequent visits to the locality he could find 
more. In the collection of slides made by the late Prof. Schmitz, 
and preserved in the British Museum, there are two Aer. expan 
of this alga labelled ‘‘ Ceramium sp. nov.?” One is a fragment 
of a plant collected at Yokohama by climes dustieg the Vex 
Expedition, and the other is from Yenoshima, Japan, and was 
