Al^ae. 327 



■■& 



slightly compressed, with very irregularly dichotomo-pinnate often 

 recurved branches. Branches sharply pointed, spine-like, often 

 dilated above into cuneate segments with fimbriated apices and 

 unite and entangle to eaeh other by the formation of root-like pro- 

 cesses from the places where they co'rae in contact. Tetrasporangia 

 densely collected in slightly thiekened branchlets. 



The diagnosis of Delisea japonica n. sp. runs as follows: 

 Fronds coespitose, linear, compressed, fiat, phinly midribed, de- 

 compound pinnate, pectinated with delteo-subulate alternate teeth, 

 which are patent and a little longer than the breadth of the raehis. 

 Cystocarps sessile, each being situated on the midrib below the 

 top of a ramulus, pointing obliquely to the midrib; with the longi- 

 tudinal axis of cystocarp making a widely obtuse angle with the 

 lower portion of the midrib and almost right angle with the apieal 

 portion of the ramulus. Okamura. 



Okamura, K., Icones of Japanese Algae. (Vol. I. 7. p. 147 — 

 177. PI. XXXI— XXXV, with two woodcuts. June 1908.) 



In this number the following 9 species are illustrated: Apoglos- 



sum violaceum (Harv.) J. Ag., Eusoniella flaccida (Harv.) Fkbg. , 



Hypoglossum geminatiim sp. nov. , Gigartina tenella Harv., G. Teedii 



(Rost) Lam., G. pacifica Kjellm., G. intermedia Sur. , Grateloupia 



lancifolia (Harv.) Okam., and Halymenia acuminata (Holm.) J. Ag. 



The diagnosis of Hypoglossum geminatum sp. nov. runs as fol- 

 lows: Frond minute, repenting, slender, linear-lanceolate, with 

 corticated midrib, veinless, repeatedly branching in geminate manner 

 by proliferating similar segments from the midrib unifariously. 

 Margin entire or fimbriated in older portion. Cystocarps sessij e 

 sittinsf on the midrib, urceolate with a wide ostiole. Okamura 



Okamura, K., Icones of Japanese Algae. (Vol. I. 8. p. 179 — 

 208. PI. XXXVI— XL. Juli 1908.) 



In this number the 8 following species are illustrated: Caloglossa 

 Leprieurii (Mont.) J. Ag., C. ogasawaraensis Okam. (= C. Zangiba- 

 riensis Goeb.), Desmaresiia tabacoides Okam. n. sp.; Catenella Opuntia 

 (Gord. et Woodw.) Grev.; Anadyomene Wrightii Harv., Struvea tenuis 

 Zanard., S. delicatula Kuetz., Dictyosphaeria favulosa (Mert.) Decsne. 



Desmaresiia tabacoides Okam. n. sp. has the largest frond among 

 the hitherto known species of that genus. Its diagnosis is given 

 as follows: 



Fronds very large, leaf-like, shortly stipitate with broadly oval, 

 very usually obliquely lobed, simple, midribed and coriaceous la- 

 mina. The midrib is slightly prominent below but gradually beco- 

 ming fainter upwards, with opposite veins which dissolve, even from 

 the base, into numerous fine veinlets. Sori forming irregularly 

 roundish patches on both surfaces. Gametangia ovato-cylindrical or 

 oblong, produced on the apieal portion of simple hairs being aecom- 

 panied by sterile ones. Colour chestnut-brown when recent, soon 

 changing into bluish-green when exposed to air. Okamura. 



Okamura, K., Icones of Japanese Algae. (Vol. I. 9. p. 209— 

 232. PI. XLI— XLV. Nov. 1908.) 



The present number contains the illustrations of the following 



