BY A. H. S. LUCAS. 53 



Both Harvey and Bonder included the following under //. 

 muelleri. 



H. acrostichoides J.Ag., Till. Algernes System, v. — Sori of tetra- 

 spores on each side of midrib in an elongated linear patch, 

 recalling arrangement of sori in Blechnam, leaving wide sterile 

 margins. Axils rather acute, margins entire. Fronds to 12 mm. 

 in width, lanceolate. Proximal part of frond terete. Tufts of 

 paranemata larger than in //. muelleri, and more conspicuously 

 arranged in arcuate, subparallel rows, curving back from the 

 midrib to the margins, those of alternate lines on opposite faces 

 of the frond, not as De Toni writes, "per laminam sine evidenti 

 ordine sparsa." Radix a stupose mass, reaching up to several 

 ounces in weight. 



Tasmania(R. Gunn), Port Fairy( Harvey), Port Phillip Hds., 

 and Western Port(J. Br. Wilson), Port Jackson and Port Stephens 

 (Lucas), Moreton Bay(G. Gross). 



Probably Bonder's record of H. muelleri for Cooktown properly 

 belongs to this species. 



H. partialis Harv., Trans. Roy. Irish Acad., xx. Fig., Harvey, 

 Phyc. Austr., PI. 29. — Sori of tetraspores forming deflexed lines 

 proceeding from the midrib to the margins. Tetraspores oval, 

 with wide colourless perispores. Axils widely angular, segments 

 very patent, margins entire, segments to 15 mm. ( Harvey's fig.), 

 proximal portion of stem becoming more or less denuded of 

 lamina. Paranemata not seen. 



"Cast ashore from deep water," Fremantle, VV.A.(Harvey, 

 Clifton). 



H. crassinervia Zanard.; Phyc. Austr. nov. sub n.5. — Sori not 

 seen. Axils rather acute, segments distant, widely linear, obtuse, 

 margins entire. Paranemata not seen. Stout conspicuous mid- 

 rib blackening on drying; rest of frond firm, turning dark brown 

 on drying. 



Lord Howe T.(Fullagar, Lind). Needs elucidation. 



ii., Fronds membranaceous, with veins running from midrib to 

 margins. 



H. australis Sond., Alg. Mueller., Linnsea xxv. Fig., Kuetz., 

 Tab. Phyc. ix., t.54. — Sori not seen. Axils rather acute, margins 



