MYXOPHYCEAE 



OF THE G. ALLAN HANCOCK EXPEDITION OF 1934, 



COLLECTED BY WM. R. TAYLOR 



(With Two Plates) 



By FRANCIS DROUET 



Department of Botany, University of Missouri 



The Myxophyceae listed here were found in thirteen samples of 

 marine algae collected by Dr. William Randolph Taylor on the 

 Galapagos Islands (Archipelago de Colon) and the Revilla Gigedo 

 Islands, and on the Pacific coast of Mexico and Costa Rica, during 

 the G. Allan Hancock Expedition of 1934. These samples consist 

 principally or entirely of blue-green algae; as the other marine plants 

 collected are examined, it is expected that more epiphytic Myxo- 

 phyceae will be found and reported. The phycological literature of 

 the general region has been listed or summarized by Robinson (Proc. 

 Amer. Acad. 38(4): 79-82. 1902), Howe (Mem. Torr. Bot. Club 

 15: 4-7. 1914), and Setchell and Gardner (Proc. Calif. Acad. Sci., 

 ser. 4, 19(11). 1930). The myxophycean flora has not been ex- 

 haustively treated by any one author; the largest number of species 

 (22) reported for any one area is listed by Setchell and Gardner 

 (ibid.) for Guadalupe Island, Baja California, and for the Revilla Gi- 

 gedo Islands, Colima. Original material cited in the list below is to be 

 distributed, on behalf of Captain G. Allan Hancock, to The Uni- 

 versity of Southern California, the United States National Herbari- 

 um, the Herbarium of the University of Michigan, my personal 

 collection, and possibly other depositories. Professor Taylor has been 

 most generous in allowing me to study this material and in offering 

 numerous welcome suggestions during the writing of this report. 



CHROOCOCCACEAE 



Chroococcus turgidus (Kiitzing) Nageli, Gattungen einzelligen 

 Algen, p. 46, 1849; Geitler, Rabenh. Kryptogamenfl. 14: 228. 1930. 



Forma cellulis praecipue S/x. ad 12^ crassis, tegumentis evidenter 

 lamellosis. Fig. i6. 



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