MARINE RED ALGAE OF PACIFIC MEXICO 



PART 7 



CERAMIALES: CERAMIACEAE, DELESSERIACEAE * 



By E. Yale Dawson 



The following is a continuation of the studies of Pacific Mexican 

 Red Algae of which parts 1 and 2 have appeared in the Allan Hancock 

 Pacific Expeditions, vol. 17 (Dawson 1953, 1954), parts 3, 4 and 5 

 in Pacific Naturalist, vol. 2 (Dawson 1960, 1961; Hollenberg 1961) 

 and part 6 in Nova Hedwigia (Dawson 1962, in press). 



The general features and some of the ecological relationships of 

 the marine flora of Pacific Mexico have been presented elsewhere 

 (Dawson 1944, 1949, 1951, 1959, 1961a, etc.) and a comprehensive 

 annotated list of the species until recently recorded in the flora is also 

 available (Dawson 1954a). A more recent summary of distributions is 

 included in Dawson 1961b. 



The specimens reported here represent the results of some twenty 

 years of collecting, mostly on expeditions of the Hancock Foundation. 

 It will be seen that the Mexican coasts north of latitude 23° have been 

 moderately well covered. Collections from the more southern coasts 

 remain spotty. 



Unless otherwise indicated, representative examples of the collec- 

 tions are deposited in the Herbarium of the Allan Hancock Foundation 

 in Los Angeles, and (or) in the Herbarium of the Beaudette Foundation 

 now on loan at the Hancock Foundation. Partial sets have been 

 distributed to the University of California, Berkeley; the Rijksher- 

 barium, Leiden; University College, Auckland; University of Washing- 

 ton, Seattle; Rutgers University, New Brunswick; University of British 

 Columbia, Vancouver; and others. 



Distribution records are given in the text from north to south for 

 the sake of consistency, the Gulf of California following Pacific Baja 

 California. 



All collections cited by number with the prefix "D." are in accord 

 with the field notebooks of E. Yale Dawson. The dates of collection are 

 as follows: 01-40 to 902-40, Jan., July 1940; 16-1094, Jan.-Feb. 1946; 



lr rhis study was supported in part by a grant from the National Science 

 Foundation, NSF G-15074, to the Beaudette Foundation for Biological Research, 

 and in part by the generosity of Mr. Palmer T. Beaudette. 



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