242 



PLOKA OP NEW ZEALAND. 



Hab. Blind Bay, Cook's Straits, Lyall, (Native of Europe.) 



Our specimens are not in fruit, but have the habit of the European N. uncinatum. 



8. NitophylluHi ? suborbiculare, Harv.; fronde pusilla subsessili rotundata indivisa, margine integer - 

 rimo vel crenato-lobato, cystocarpiis sorisque per totam frondem dense conspersis. 



Hab. Parasitical on Carpopkyllum Maschalocarpus. Blind Bay, Cook's Straits, Lyall. Hawke's Bay, 

 Colenso. 



Frond with a very minute setaceous stipes, or subsessile, suddenly expanding into a roundish, delicately mem- 

 branaceous, entire lamina, about 1 inch in diameter, and of a bright rosy-red colour. Lamina composed of a single 

 layer of irregularly angular cells, of moderate size. Conceptacles scattered over the surface, prominent on both sides, 

 depressed, spheroidal, with thick walls composed of several rows of cells in radiating lines. Nucleus not perfectly 

 seen in the few cuttings made. Tetraspores formed in slightly thickened, depressed, wart-like sori scattered over 

 the surface. 



We are not quite certain of the genus of this plant, the nucleus requiring a careful re-examination, when more 

 specimens shall have been obtained. Should it have the structure of the Rliodyrneniacem, as we half suspect, the 

 genus may be called Abroteia. 



Gen. LVI. SABCODIA, /. Ag. 

 (J. Ag. Sp. Alg. ii. 622. Rhodymenice sp., Hook, et Harv.) 



1. Sarcodia Montagneana, J. Ag., Sp. Alg. v. 2. p. 623. Bhodymenia Montagneana, Hook. fil. et 

 Harv. in Lond. J. Lot. v. 4. p. 544. Harv. Ner. Austr. t. 48. Bhodophyllis Montagneana, K-iitz. Sp. Alg. 

 p. 787. 



Hab. Bay of Islands, /. D. H., Lyall. 



A very distinct genus, with a curious and beautiful structure of frond. 



Gen. LVII. PHACELOCAEPUS, Midi, et Lies. 

 (Endl. et Dies. Bot. Zeit. 1845, p. 290. J. Ag. Sp. Alg. ii. 646. Ctenodus, Kfitz. Phyc. Gen. p. 407.) 



1. Phacelocarpus Labillardieri, J. Ag., Sp. Alg. v. 2. p. 648. Ctenodus Labillardieri, KMtz. Phye. 

 Gen. p. 407. t. 58./. 2. Hook. fil. et ILarv. in Lond. J. Bot. v. 4i.p. 549. Eucus Labillardieri, Mert. in 

 Turn. Hist. if. 137. 



Hab. Common, Sinclair, Lyall, Colenso, etc. (Native of New Holland.) 



Gen. LVIII. MELANTHALIA, Mont. 



(Mont. An. So. Nat. 1843. Kritz. Sp. Alg. p. 784. J. Ag. Sp. Alg. ii. 611.) 



1. Melanthalia abscissa, Hook. fil. et Harv., Lond. T. Bot. v. 4>.p. 548. J. Ag. Sp. Alg. v. 2. p. 613. 

 Fucus abscissus, Turn. Hist. t. 223. Chondrococcus abscissus, Kiitz. Sp. Alg. p. 752. 



Hab. New Zealand, Banks. 



2. Melanthalia Jaubertiana, Mont., PI. Cell. JExot. v. 4<.p. 36. /. Ag. Sp. Alg. v. 2. p. 613. Hook, 

 fil. el Harv. in Lond. J. Bot. v. 4i.p. 548. Kiitz. Sp. Alg. p. 784. 



Hab. Abundant in several localities, Sinclair, J. B. LL, Lyall, Colenso, etc. (Native of Tasmania.) 



We retain this species in deference to the opinions of Dr. Montagne and Professor J. Agardh, although unable 

 to point out a character by which it can be distinguished from M" abscissa, of which we consider M. Jaubertiana to 

 be only a more developed form. 



