24 THE HANCOCK PACIFIC EXPEDITIONS VOL. 3 



Hydrocoleum cantharidosmum (Montagne) Gomont, ex Ann. 

 Sci. nat. VII, Bot. 15: 336. 1892. 



Forma trichomatlbus 19/^ ad 24/x, etiam ad 27/* crassis, apicibus 

 attenuatis et fere truncato-capitatis; dissepimentis non granulatis. 

 Fig. g. 



MEXICO: Oaxaca, in intertidal pools, Tangola-Tangola Bay, 

 No. S56, February 28 - March 1. COSTA RICA: Port Culebra, tide 

 pools, No. 5S5y February 24. 



Setchell and Gardner (Proc. Calif. Acad. Sci., ser. 4, 19: 123. 

 1930) reported this alga previously from Guadalupe Island, Baja 

 California. 



MicRocoLEus TENERRiMus Gomout, Ann. Sci. nat. VII, Bot. 15: 



355. 1892. 



Forma trichomatlbus 1.5/.1 ad 1.8^ crassis, ad genicula constrictis, 

 ad apices tenuibus et acuto-conicis; cellulis diametro 2- ad 5-plo 

 longioribus, etiam cellula apicali ad 8-plo longiori; vaginis amplis, 

 chlorozincico iodurato non caerulescentibus. Fig. ii and I2. 



ECUADOR: Galapagos Islands, bottom of an inland salt la- 

 goon, Fernandina Id., No. ij§, January 14. 



This sample does not contain the species in abundance, yet 

 typically developed filaments were seen in sufficient numbers to make 

 certain their identity. For geographic distribution of this species, see 

 Fremy, Bull. Soc. Linn. Normandie ser. 7, 7: 181-184. 1924. 



Lyngbya epiphytica Hieronymus i?i Kirchner, Schizophyceae, p. 

 67, in Engler & Prantl, Natiirl. Pflanzenfam. l(la). 1898; Lemmer- 

 mann, Ark. f. Bot. 2(2): 103. 1904; Geitler, Rabenh. Kryptogamenfl. 

 14: 1038. 1932. 



Forma filamentis epiphyticis, tenuibus; trichomatlbus 1/x ad 

 1.5/A crassis, ad genicula non constrictis; cellulis pallide aerugineis, 

 diametro 1- ad 2-plo longioribus; vaginis tenuissimis, hyalinis, chlo- 

 rozincico iodurato non caerulescentibus. Fig. 8. 



ECUADOR: Galapagos Islands, on Hydrocoleum in higher tide 

 pools, Wenman Id., No. 8j, January 11. 



A similar but apparently colorless form which is possibly of 

 bacterial nature is epiphytic on the larger blue-green algae of several 

 other samples. It is equally possible that the lack of color is due to 



