116 MRS. A. WEBEE-VAN BOSSE ON THE 



Earn. SPHiEROCOCCACE^. 



Gelidiopsis, Sclimitz. 



r 



Gelidiopsis variabilis (Grev.), Schmitz. 



Schmitz, Marine Florideen Yon Deutsch Ost-Afrika, in 

 1895, p. 148. 



Seyclielles, Long Island, reef. 



Distribution. Indian Ocean ; East coast of Africa. 



4 



Jahrb. Bd. xxi, H. 1^ 2^ 



2. Gelidiopsis rigid a (VaTil), Web. v. B. 



Recueil des Travaux botaniques Neerlaudais^ no. 1, 1905^ p. 9. 

 Fuous riffidus, A^alil, in Naturh. Sellskabets Skrifter, v. p. 46. 



Seychelles, reef; dry specimen. 



Praslin, reef; dry specimen and in alcoliol. 



Diego Garcia, reef ; dry specimen. 



Terne Mate, reef ; dry specimen. 



Distribution. Common in tropical seas. 



In 1904 I wrote in the above-mentioned paper that it appeared to me that the well- 

 known Gelidium rigidum of the tropical seas was not a Geiidium, hut belonged to the 

 genus Gelidioj)sis. In 1909 Prof. Okamura gave, in his ' Icones of Japanese Algse,* 

 pi. lix., a figure of this alga and also of its large apical cell, and named it Getidium 



. I had failed to detect this large apical cell, and its absence was one of 

 the reasons why I thought that the alga could not be a Gelidium; I had seen no 

 cystocarps. Quite recently, in * Icones of Japanese Algae,' vol. ii. No. 10, p. 188, 

 Prof. Okamura has recalled his statement, made before he had seen my paper, and 



■5 



ith me in naming Gelidium rigidum^ Gelidiopsis rigida. This alga 



its ramification, the lateral branches being short or long, or sometimes unilaterally 

 inserted. I believe, however, that these variations are only a form of growth. 



Gelidiopsis being a feminine substantive in the Greek language, the adjective should 

 have the feminine ending, and I made an error when I called the alga Gelidiopsis 

 rigidum in 1904i. 



Gracilaria, GrevUle. 

 1. Geacilaria compressa (Ag.), Grev. 



Agardh, Species Algarum, 1823, p. 308. 



Grevillo, Algse Britann. 1830, p. 125. 



De Toni, Syll. Alg. vol. iv. sect. ii. 1900, p. 438. 



Amirante, 25 fms. 



Distribution. Atlantic Ocean ; Mediterranean ; Gulf of Mexico. 



The specimen is rather slender for G. compressa and scantily branched, but I assume 



