ALGÆ NOVÆ ZELANDLE. 543 
Has. New Zealand, very abundant. R. Cunningham and 
all succeeding voyagers. 
This appears to be the commonest species at New 
Zealand, and yet, though we have examined hundreds of 
specimens we have not seen any in fruit. Fronds 4-6 inches 
high, a line or rather more in breadth. 
77. Plocamium abnorme, nobis; fronde angusta tenui nervo 
obsoleto percursa pinnatim decomposita virgata, pinnis 
pinnulisque alterne geminis sensim angustatis, ultimis 
angusfissimis, ramulis subulatis integerrimis acutis, sti- 
chidiis axillaribus subsolitariis simplicibus furcatisve lan- 
ceolatis, nonnunquam e pinnulis ipsis ultimis transmutatis 
formatis. 
Has. Bay of Islands, Lyall, Hooker. 
Very nearly related to P, angustum (Thamnophora angusta, 
J. Ag), but differing in the fructification, which often 
affords a satisfactory character in this genus. In P. an- 
gustum the stichidia form dense racemose clusters, here they 
are commonly solitary and either simple or once forked ; but 
what is strange, and has suggested the specific name, the 
ultimate pinnules themselves are frequently converted at 
their tips into false stichidia, which bear tetraspores like the 
rest! "The habit resembles P. coccineum, from which the al- 
ternately geminate branching, the position of the fruit and’ the 
substance separate it. 
78. Plocamium penne Lyngb. Fucus coccineus, Turn. 
t. 59. 
Has. New Zealand, Cunningham, Hooker, Lyall. .. 
79. +Plocamium confervaceum, Bory, in Dup. Voy. p. 164. 
Has. New Zealand, Lesson. 
Possibly this scarcely known and ill characterised species 
may be the same as our P. abnorme. 
SPHÆROCOCCOIDEZÆ, 
80. Rhodomenia Hombroniana, Mont. Voy. Pole Sud. p 157. 
t. 1. f. 2. Hook. fil. FI. Antarct. t. 60d 2, die a 
Han, Akaros, Raoul, tee re. 
