NO. 2 drouet: myxophyceae 17 



Filamenta uniseriata, recta aut flexuosa, 8/a ad 23ix crassa, vel 

 variis algis permixta vel in stratum aerugineum mucosumque ag- 

 gregantia; cellulis discoideis, 4[x ad ll.Sfji latis, 2fx ad 6jLt longis; 

 protoplasmate pallide aerugineo-caeruleo, saepe olivaceo aut brunneo 

 aut etiam aureo-brunneo, homogeneo aut paulum granuloso; cellula 

 apicali saepius depresso-conica; tegumento homogeneo aut rarius 

 circum cellulis binas adjacentes tenui lamelloso, 1.5/i. ad 6f(, crasso, 

 conspicua delimitato, chlorozincico iodurato non caerulescente. Fig. 

 3 et 4. 



FLORIDA: Dry Tortugas, among other filamentous algae, Long 

 Key, W. R. Taylor, July 1925 (original material of Nodularia ? fusca 

 W. R. Taylor, in the private collection of Professor Taylor). 

 PORTO RICO: San Juan, Lake Tortuguero, N. Wille No. 830b 

 (type of Cyanothrix primaria Gardner, in Herb. N. Y. Bot. Gard.), 

 83oe (type of C. Willei Gardner, in Herb. N. Y. Bot. Gard.), 84.4.6, 

 84gc, February 5, 1915. ECUADOR: Galapagos Islands, bottom 

 muck in the center of an inland salt pool, north end of Isabela Id. 

 near Albemarle Point, No. 123, January 12; bottom sample from 

 an inland salt lagoon, Fernandina Id., No. 133, January 14. Profes- 

 sor I'Abbe Fremy reports collections also from DUTCH WEST 

 INDIES: Buen Ayre, Oranjepan, Hummelink, and from ALGERIA: 

 Southern Oran, Ain Ouarka, Ahne. Gauthier-Lievre. 



This puzzling and recently discovered alga appears to be widely 

 distributed in saline and subsaline pools along tropical coasts. 

 Originally described from Porto Rico by Professor Gardner in 1927, 

 the species has already within a space of eight years accumulated 

 the astonishing array of synonymy displayed above. Professor Fremy 

 (ibid.) has reviewed this synonymy in his excellent article. There 

 is no adequate reason to discard the binomial J ohannesbaptistia 

 priviaria (Gardner) J. deToni.^ 



As Professor Fremy has already pointed out, Professor Gardner 

 separated his two species of Cyanothrix primarily on the basis of size 

 of cells and filaments. The original publication gives us to understand, 

 however, that Professor Gardner felt at the time of writing that he 

 may have been dealing with a single variable species. Cyanothrix pri- 

 having cells 6 to 6.5ju, wide. The macroscopic appearance of the type 



vi I am indebted to Professor W. R. Taylor and Dr. M. A. Howe for the use of 

 the various specimens of Johannesbaptistia cited here, and to Professor N. L. 

 Gardner and Professor I'Abbe P. Fremy for the use of certain literature otherwise 

 unavailable to me. 



