March, line.] k. YENDO.— NOTES ON ALGAE SEW TO JAPAN. VI. 91 



combined with L. heterocladia. The specimens distributed by 

 Harvey as Austr. Algae no. 233 under L. arbuscula Sond. is 

 quite different from this. 



Locality, Rebun Island (!) ; Hidaka Prov. (!) ; Rikuchu 

 Prov.(!). 



Distribution. New Holland ; California ; ? Cape of Good 

 Hope ; ? Van Diemens Land ; ? India. 



Chondria lanceolata Harv. 



Alg. Austr. exsicc, No. 156. — Id. : Bot. of West Austr., p. 549. 

 —Id.: Phyc. Austr., PI. 239.— De Toni : Syll. Alg. IV, p. 837. 

 = Chondriopsis lanceolata J. Ac. : Anal. Alg. p. 157. 



Though only one specimen is all I have, it agrees satisfac- 

 torily with its co-type in the Agardhian Herbarium. 



Locality. Tanegashima. Found growing on a leaf of 

 Zostera (Dr. T. Inui). 



Distribution. New Holland. 



Pleonosporium venustissimum De Tone 



Syll. Alg. IV, p. 1309. 

 — Callith amnion venustissimnm Mont, in Ann. Sc, Nat., Bot. 



(1860), p. 172.— Kutz. : Tab, Phyc. XII, Taf. I, fig. a-b. 

 = Callithamnion vancouvcrianum J. Ac. : Epicris, p. 30. 

 = Pleonosporium vancouven'anum J . Ao. : Anal. Alt;., p. .'17 SETCH. 

 et Gardn. : Alg. N. W. Amer., p. 338. — Collins: Alg. Vancouv. 

 Id., ]>. 12 1, 



(For oilier referrences, sec : De Toni, I.e. J. 



In general appearance of frond, the plant recalls Callilh.im 

 nion corymbostttn. But from the latter it i> easily separated 

 by having no cortication in the basal part ol frond. The frond 

 gives out a. rhizoidal filament downwards, generally simple bul 

 frequently sparingly ramified, from the basal c< II ol ;i lateral 

 pinnule. Tin-- character seems quite seldom in Callithamnion, 

 hut rather common in J'lconospotiuw, though it i^ nol counted 

 as a peculiarity ol' the genus. 



