252 



FLORA OP NEW ZEALAND. 



[Algae. 



known to us. Two inches long. — Plate CXIX. B. Fig. 1, plant, the natural size ; 2, a branch and ramuli, magnified ; 

 3, cross section of a fragment of the frond, highly magnified. 



3. Gigartina decipiens, Hook. fil. et Harv.— Iridsea decipiens, Hook. fil. et Harv. in Lcmd. J. Bot. v. 4, 

 p. 547. J. Iff. Sp. Jig. v. 2. p. 257 '. Kfflz. Sp.Jlg.p. 728. 



Hab. New Zealand, JRaoul. 



4. Gigartina ancistroclada, Mont., Toy. Pole Sud, p. 121. t. l.f. 4. Kiitz. Sp. Alg. p. 751. J". Ag. 

 Sp. Alg. v. 2. p. 272. 



Hab. Akaroa, D'Urville. Otago, Lyall. 



5. Gigartina alveata, J. Ag., Sp. Alg. v. 2. p. 271. Chondrus alveatus, Gra;. Hooh.fil. et Harv. in 

 Bond. J. Bot. v. 4>.p. 547. Fucus alveatus, Turn. Hist. t. 239. 



Hab. New Zealand, Banks, Cunningham, J. B. II. 



6. Gigartina livida, J. Ag., Sp. Alg. v. 2. p. 270. Mont. Pole Sud, p. 120. Hook. fil. et Harv. Bond, 

 J. Bot. v. 6. p. 407. Fucus lividus, Turn. Hist. t. 254. 



Hab. Paroa Bay, Otago, and Jackson's Bay, Lyall. (Native of Tasmania.) 



7. Gigartina Chauvinii, J. Ag., Sp.Alg. v. 2. p. 268. Mont. Bonit.p. 72. Splraerococcus Cliauvinii, 

 Bory, Coq. t. 20. 



Hab. New Zealand, H Urville. (Native of extratropical South America.) 



8. Gigartina stiriata, A. Ag., Sp. Alg. v. 2. p. 277. Iridsea stiriata, Bory. Hook. fil. et Harv. Bond. 

 J. Bot. v. 4i.p. 547. Fucus stiriatus, Turn. Hist. t. 16. 



Hab. Paroa Bay, Lyall. (Native of the Cape of Good Hope.) 



9. Gigartina Radula, J. Ag., Sp. Alg. v. %. p. 278. Mastocarpus Eadula et bracteatus, et Chondrodic- 

 tyon Capense, Kiitz. IridEea Badula, Bory, Coq. p. 107. Hook. fil. et Harv. Fl. Ant. v. l.p. 188, et v. 2. 

 p. 485. Fucus bracteatus, Turn. Hist. t. 25. 



Hab. Bay of Islands, etc., J. B. II. (Native of the Cape of Good Hope and Pacific Ocean.) 



Gen. LXXYIII. lEID^A, Bory. 

 (Bory, Coq. p. 103 (excl. sp.). J. Ag. Sp. Alg. ii. 250. Harv. Ner. Bor. Amer. pt. 2. p. 178.) 



1. Iridsea micans, Bory, Voy. Coq. p. 110. t. 13 et 13 his. Mont. Voy. Pole Sud, p. 104. Hook, 

 fil. et Harv. in Bond. J. Bot. v. 4<.pp. 263, 548. 



Hab. Akaroa, H Urville. (Antarctic shores and South America.) 



2. Iridsea lanceolata, Harv.; frondibus gregariis corneo-membranaceis, stipite lineari-cuneato foliolis 

 pinnato in laminam lanceolatam attenuatam undato-crispatam purpureo-sanguineam senshn dilatato. 



Hab. Otago, By all. 



Fronds many from the same base, 1-2 feet long, rising with a linear-cuneate, flat stipes, about 1 inch long 

 and 1 or 2 lines broad, which is pinnated with patent, linear, or lanceolate leaflets, and gradually widens into 

 the base of the lamina. Lamina lanceolate, gradually tapering to each end, 1-3 inches broad, undate and variously 

 crisped. Colour a purplish-red, brightening in fresh water. Substance rather rigid. It imperfectly adheres to 

 paper. Fruit unknown. — Allied to I. laminarioides, but seemingly distinct. 



3. Iridsea lusoria, Harv. Bhodymenia lusoria, Grev. in Hook. Comp. Bot. Mag. v. 2. p. 329. Hook, 

 fil. et Harv. Bond. J. Bot. v. 4. p. 544. 



Hab. East Coast, Cunningham. 



Our specimens are very imperfect, but have the structure of frond proper to this genus. 



