350 NEW MARINE ALG^E. 



)ihi/lU,s. The colour is a dark purplish red, or in older plants 

 blackish red. The height in my specimen does not exceed 3 in. 



2. Ptilophora Beckeri, n. sp., radice fibrosa, fronde 1-1^- 

 pedali, mox supra basin umbeliatim divisa, ramis elongatis bis 

 terve irregulariter pinnatis ; costa tenui, infra apicem evanescente 

 percurso ; pinnulis ultimis in statu juniori obtuse dentatis, in 

 adultiori dentibus in ligulis angustissimis ad semi-unciam longis 

 productis, cystocarpiis ovalibus in apice ligulorum evolutis. 



Hab. The Kowie, Dr. H. Becker, July, 1892. 



This plant was received from Dr. Becker under the name of 

 Ptilophora prolifera, Harv. It bears a considerable resemblance to 

 Pterocladia lucida, and was for some time passed over by me as that 

 plant. On examining it more closely, I noticed the cystocarps 

 were bilocular, and that the structure of the frond consisted of four 

 layers of cells and a central fibrous layer, followed by a layer of 

 rounded cells, then a thinner layer of fibrous cells, and finally a 

 layer of minute cortical cells, all exactly similar to those occurring 

 in P. prolifera. But from that species it differs entirely in the 

 absence of squamose proliferations on the surface of the frond, 

 and in the slender but more pronounced nerve in the ramuli. It 

 comes very near to a species described by Dr. J. G. Agardh (Till 

 AU/erues, iv. 79) under the name of Ptilophora pnnnatijida : but in 

 this species, of which a specimen exists in the herbarium at Kew, 

 the cystocarps occupy tbe middle of the ligules terminating the 

 teeth, and the ligules are themselves very much shorter, not ex- 

 ceeding \ in. in length. Dr. Agardh, who has seen my specimens, 

 is of opinion that the two species are distinct. 



These two species should in my opinion form, together with a 

 Japanese plant described by Okamura (Hedwigia, xxxiii. 190, t. x.) 

 under the name of Gelidium suhcostatum, a separate section of the 

 genus Ptilophora, characterized by the flattened frond without 

 proliferations on the surface. The Japanese plant shows exactly 

 the same structure of four layers in the frond, but the tetrasporic 

 sori occupy the whole of the teeth of an abbreviated pinnule ; the 

 root is fibrous ; the plant branches in the same umbellate manner 

 as in P. Beckeri, at about an inch above the base, but the branches 

 are shorter and more cro'wded, and the teeth do not elongate into 

 ligules. The habit and structure of the plant nevertheless ally it 

 to Ptilophora rather than to Gelidium, in which I have not seen the 

 infra-cortical fibrous layer characteristic of Ptilophora. 



3. Eeythroglonium corallinum, nom. nov., plauta denuo de- 

 scripta [Gastridium corallinum Suhr in Flora, xix. 344, t. iv. fig. 31 

 (1836), fronde cfespitosa, unciali, fere tota stricturis articulata, ad 

 stricturas irregulariter dichotoma, ramis paucis subcorymbosis, 

 articulis ellipticis, obovatis, terminalibus brevioribus diametro 

 duplo-longioribus, infimis subcylindricis diametro 4-6 longioribus, 

 sphferosporis zonatis sparsis. 



Hab. The Kowie, Dr. H. Becker, 1885. 



This small species bears a considerable resemblance to young 

 plants of Chylocladia articulata, but is very sparingly branched, and 

 does not exceed an inch in height. The specimens found by Suh 



