ALGZ NOVZ ZELANDIA. 545 
in the structure of the frond there is a near resemblance to 
R. polycarpa. The fronds which produce tetraspores are 
larger, with broader segments and perfectly smooth, and 
the tetraspores are thinly scattered over the surface, not col- 
lected into cloudy patches. A magnificent species, nearly 
allied to R. ornata, Mont.; but, as we are assured by that 
author, perfectly distinct, and we have much pleasure in 
inscribing it with his name, as a mark of our respect, 
and gratitude for his able illustration of the Alge of the 
Southern Hemisphere. 
86. Rhodomenia? coriacea, nobis; fronde crassa coriacea 
. siccitate cornea flabelliformi palmatim et pedatim laciniata, 
laciniis cuneatis latis escas aripa obtusatis, axillis ro- 
tundatis. cea ; 
Has. Bay of Islands, Lyail. 
The specimens are too imperfect to enable us to decide 
on the genus, and probably the above character is very in- 
adequate, but we are unable at present to give a more in- 
telligible one. It is possibly a large growing plant, but 
our specimens, evidently broken, are only 4-5 inches long; 
they have a circular outline and a remarkably thick leathery 
and almost horny substance. Their slices under the micro- 
scope exhibit a structure not unlike that of Rhodomenia ; 
the centre being composed of large polygonal cellules, gra- 
dually smaller to the surface. All the cellules contain endo- 
chrome. 
87. Plocaria? pues nobis ; potiti basi cylindracea mox 
compressa angustissima lineari pluries dichotoma fasti- 
giata rigida tenacissima siccitate cornea, axillis patentibus 
obtusis, apicibus obtusissimis rotundatis, coccidiis ad latera 
furcarum inferiorum insidentibus subimmersisve sparsis v. 
spe oppositis. 
. Has. Bay of Islands, Sinclair. 
Frond 6-8 inches long, not half a line in diameter, of equa 
breadth throughout, pretty regularly dichotomous, in outli 
.. broadly flabelliform. Substance very tough, rigid ai a 
i when dry. Coccidia borne on the lra ni hes, 
Bed 
