654 IX. algaj. [Notkeia. 
shaped, axis of solid interwoven filaments; periphery of radiating coloured 
filaments. 
Probably common, first found by Wilkes’s Expedition ; Parimabu, Colenso ; Bank’s Pen- 
insula, Lyall. (Tasmania, Australia.) 
13. D’TJRVILLiEA, Bory. 
Root scutate. Frond stalked, dark olive-brown or black, flat, expanded, 
very thick and coriaceous or honeycombed transversely internally, palmate 
or pinnate, without distinct organs. Fruit dioecious. Conceptacles scattered 
over the whole frond in the cortical stratum, containing either obovoid sub- 
sessile spores or branched filaments bearing obovoid antheridia. 
A genus of a few southern huge black Alga, one often forming a load for a man, which 
are thrown up after every storm on the rocky coasts of the Southern Ocean. 
1. D. utilis, Bory in Voy. Coquil. t. i. and ii. /. 1 ; — FI. JV. Z. ii. 216. 
Frond dark brown or black, often 30 ft. long, forming an immense flabel- 
late palmately lobed laciniated lamina, contracted at the cuneiform base 
into a short stipes as thick as the wrist; segments or thongs often 1 in. 
thick, honeycombed internally. — J. Ag. Sp. Alg. i. 188. Fucus Antarcticus, 
Chainisso. 
Common on the coasts, especially southwards as far as Campbell’s Island, and floating 
in the ocean as far as lat. 62° S. (Chili, Puegia, Falkland’s Islands, Kerguelen’s Land.) 
14. SPOROCHNUS, Agardh. 
Frond dull olive-brown or yellow-green, filiform, pinnately decompound, 
solid, cellular; axis more dense. Receptacles on long slender stalks, narrow 
cviindric, crowned with a soft long pencil of filaments, surface covered with 
branching sporiferous filaments ; spores obovoid, attached to the sides of the 
filaments. 
A genus found in both temperate zones. 
1. S. stylosus, Han. in FI. N. Z. ii. 216. t. 109 B. Frond pale 
olive-green. 6-8 in. long. Stem filiform, laterally branched; branches scat- 
tered or fascicled, simple, elongate. Receptacles subsessile, cylindric or ellip- 
tic-oblong, crowned by a long style-like process | to ■§. its own length. 
Foveaux Straits and Otago Harbour, Lyall. 
15. CARPOMITRA, Kuetzing. 
Frond pale olive-green, linear, filiform, compressed or flat and midribbed, 
irregularly branched, cellular; axis dense. Receptacles ovoid conical or mi- 
triform, terminating the branches, composed of branching filaments whorled 
round a vertical axis and developing elliptic-oblong spores. 
A European as well as southern genus. 
1. c. Cabrerae, Kuetz.; — Fl. N. Z. ii. 217. Root of matted fibres. 
Frond 6-8 in. long, much branched from the very base; branches 2-edged, 
