MAEINE ALa^ OF THE ' SEALAEK ' EXPEDITION. 137 



2. Ceramium spec. 



Cargados Carajos, 47 fms. 



On Heterosiphonia Mendlei; barren specimens 



E-EiNBOLDiELLA, De Toni. 



■m 



1. Reinboldiella Schmitziana (Eeinb.), De Toni. 



Phycese japon. novae, 1895, p. 35. 



Gloiothamnion Schmitzianum, Reinbold, in Hedwigia, 1895, p. 205. 



Chagos Arcbipelago, Egmont Reef; in alcoliol. On Gelidiopsis 

 Solomon Island. On Gelidium. 

 Distribution. Japan ; Malay Arcliipelago. 



Pam. GEATELOUPIACEiE 



Halymenia (C. Ag.), J. Agardh 



1. Halymenia polyclada, a. & E. S. Gepp. 



Var. aldaeuadensis, n. var. — Thallo e callo basali subito cuneatim expanse 10 cm. 

 alto, 4-5 cm. lato deinde palmati-partito constante ; ramis usc[ue ad 6 cm. longis, 

 0-5-1 cm. latis, ramulis lateralibus iterum iterumque subdichotomicis pinnatis, 



angustis. 



Aldabra, outer reef; dry specimens. 



Distribution. Christmas Island. 



JSahjmenia polyclada belongs to Agardh's Acanthjmenia section of Halymenia, 

 According to Schmitz, it is highly probable that this group is identical with the 

 genus Gelinaria, Sond. Schmitz is further of opinion that the differences existii 

 in anatomical structure are sufficient to separate Acanthymcnia from the genus Hal 

 menia. So lon^, however, as we do not know the cystocarps of the genus Gelinar 



o 



name 



I think it more expedient to follow Agardh, although ultimately we will probably 

 to follow Schmitz and call the species of the Acanthjmenia group by the generic 



of Gelinaria. 



The specimens from Aldabra are very similar to H. polyclada, which is nearly allied 

 to S.formosa. It has a subdichotomous ramification, but lateral ramuU are plentiful 



the margins of the upper branches. In the lower part of the fronds the 



m r 



e almost entire. It is a stronger plant than H. polyclada, but has the same short stall 

 panding suddenly into a broad frond. In how far //. formosa, Durvillm, and polyclad( 

 e really good species, is a question that future investigations must decide. 



SECOND SEEIES. — BOTANY, VOL. Vllf. 



X 



