244 FLORA OF NEW ZEALAND. 



2. Gelidium asperum, Grev., Kiitz. Sp. Alg. p. 475. /. Ag. Sp. Alg. v. 2. p. 475. 

 Hab. New Zealand, Baume, fide J. Ag. I. c. (New Holland.) 



\_Algce. 



Gen. LXII. PTEBOCLADIA, J. Ag. 



(J. Ag. Sp. Alg. ii. 482. Gelidii sp., Auct.) 

 1. Pterocladia lucida, J. Ag., Sp. Alg. v. 2. p. 483. Gelidium lucidum, Sond. PI. Preiss. v. %. p. 174. 

 Hook. fil. et Harv. in Lond. J. Bot. v. 4. p. 549. Kiitz. Sp. Alg. p. 763. Eucus lucidus, Br. in Turn. 

 Hist. t. 238. 



Hab. Very abundant. (Native of New Holland.) 



A most variable plant, sporting quite as much as Gelidium corneum. Pterocladia is only to be known from 

 Gelidium by the structure of the conceptacle. In external habit, and in the structure of the frond, there is a close 

 resemblance. 



Gen. LXIII. HYPNEA, Lamour. 

 (J. Ag. Sp. Alg. ii. 438. Kiitz. Sp. Alg. p. 758, etc.) 

 1. Hypnea musciformis, Lamour. J. Ag. Sp. Alg. v. 2.p.M2. Kiitz. Sp. Alg. p. 758. Eucus mus- 

 ciformis, Wulf. Turn. Hist. t. 127. 



Hab. New Zealand, Banks. (Native of tropical and sub-tropical seas.) 

 We have not seen any New Zealand specimens of this plant. 



Gen. LXIV. CAULACANTHUS, Kiitz. 

 (Kiitz. Phyc. Gen. p. 395. Sp. Alg. p. 753. J. Ag. Sp. Alg. ii. 432. Olivia, Mont. Fl. Alg. p. 126.) 

 1. Caulacanthus spinellus, Kiitz., Sp. Alg. pi. 753. J. Ag. Sp. Alg. p. 434. Ehodomela? spinella, 

 Hook. fil. et Harv. in Lond. J. Bot. v. 4. p. 534. Ilarv. Ner. Austr. p. 36. 

 Hab. On corallines, mussel-shells, etc. Common, Colenso. 

 We formerly misunderstood the affinities of this little plant, which is a true species of Caulacanthus. 



Teibe VII. CHjETANGIBjE. 

 Gen. LXV. APOPHLCEA, Harv. 



(Harv. in Lond. J. Bot. iv. 549. Kiitz. Sp. Alg. p. 795. J. Ag. Sp. Alg. ii. 457.) 



1. Apophloea Sinclairii, Harv., Lond. J. Bot. v. 4. p. 550. Kiitz. Sp. Alg. p. 795. J. Ag. Sp. Alg. 

 v. 2. p. 548. (Tab. CXVI. B.) 



Hab. New Zealand, Sinclair, Wilkes, Colenso. 



Plate CXVI. B. Pig. 1, plant, attached to a stone ; 2, cross section of a minute portion of the frond ; 3, tetra- 

 spore-cavity from the same ; 4, tetraspores ; 5, peripheric filaments of the frond -.—more or less higlly magnified. 



2. Apophloea Lyallii, Hook. fil. et Harv. ; fronde stipitata flabelliformi fastigiata dichotome ramosis- 

 sima, ramis pluries furcatis flexuosis patentibus crassissimis, axillis rotundatis apicibusque obtusis, strato 

 corticali madefacto persistente. (Tab. CXVI. A.) 



Var. ^. gigarlinoides ; fronde minori omnibus partibus dimidio graciliori, casterum simillima. 



Hab. On rocks, Preservation Harbour, Middle Island ; and var. /3 at Otago, Lyall. 



Fronds, in var. a, 5-6 inches long, with a slender stipes, which gradually increases in diameter upwards, forks 

 about an inch above the base, and then attains from l|-2 lines in diameter. It afterwards forks eight or nine times, 

 the diameter remaining nearly the same, until at the final furcations it rapidly diminishes. Axils all rounded, and 



