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alga in consideration shows many points of resemblances, has 

 simple or decomposite proliferations either from the midrib or 

 surfaces as well as from margins, making the proliferations to be 

 no hinderance for ranking related alga among Gelidium. Still 

 again, the mode of ramification in Suhria japonica is pinnate, as 

 I have already remarked, and both kinds of fruits are formed, as 

 in many species of Gehdium, beneath the apices of terminal 

 pinnulae of proliferated pinnae, which is also the case in Gelidium 

 pristoides. From the points so far stated, I think it more proper 

 to place Suhria japonica in Gelidium than putting it in Suhria 

 or in Porphyroglossum. 



Among hitherto-known species of Gelidium, the present alga 

 has so much remarkable resemblance with Gelidium pristoides, 

 the specimens of which I have in my herbarium, that the illustra- 

 tions given in Kiitzing's Tab. Phyc. Vol. XVIII, t. 65 remind us, 

 at first glance, a certain form of Suhria japonica. - The chief 

 differences are that our alga has broader size of frond and non- 

 denticulate sporophylls. 



In Martens' Preus. Exped. n, Ost-Asien, Tange, p. 133* 

 Gelidium pristoides Turn, is enumerated among our marine flora 

 as collected by ^)iebold and De Toni mentions the same species 

 in his Phyc. Jap. Nov. p. 22. Gelidium pristoides, however, does 

 not grow in this country, as far as my knowledge goes, and I 

 want to take off that species from the list of our marine algae, 

 notwithstanding of my ignorance of Siebold's specimens, as 〖 

 believe it to be nothing but Suhria japonica. 



Plate XXI. Fig. I : Gelidium japoiiicum bearing tetra- 

 sporangia, in nat. size. — Fig. 2 : portion of branch bearing tetra- 

 sporic pinnulae, slightly magnined. 一 Fig. 3 : portion of branch 



