TSUDA 



TABLE 1 (cont'd) 



Family DELESSERIACEAE 



Hypog/ossum minimum Yamada: Dawson, 1957; Gilmartin, 1960. 

 Martensia fragilis Harv. 



Hemitrema fragilis (Harv.) Dawson: Dawson, 1957. 

 Family RHODOMELACEAE 

 'Chondria baileiiana (Montagne) Harv.: Gilmartin, 1960. 

 'Chondria minutula W. v. Bosse: Dawson, 1957. 

 'Chondria poli/rhiza Collins and Hervey: Dawson, 1957. 

 Chondria repens Boerg.: Dawson, 1957; Gilmartin, 1960. 

 * Dauisonie//a bulborhiza Hollznberg: Hollenberg, 1967. 

 Laurencia mariannensis Yamada: Taylor, 1950b; Dawson, 1957. 

 Laurencia nana Howe: Dawson, 1957. 

 Laurencia parvipapillata Tseng: Dawson, 1957. 



'Only specimen recorded from Micronesia. 

 fHolotype based on Enewetak specimens. 



species (nine Chlorophyta, three Phaeophyta, and 28 Rho- 

 dophyta) or 16% of the species reported from Enewetak 

 represent the only collections known from the geographic 

 region of Micronesia (preceded by an asterisk in Table 1). 

 It is unlikely that these species are unique to Enewetak; 

 further intensive collections from other areas in Micronesia 

 will no doubt provide additional records. To date, there 

 has been no record of a seagrass on Enewetak. Thalassia 

 hemphchii (Ehrenb.) Aschers is the only species of 

 seagrass reported from the Marshall Islands, and it has 

 been found on Ujilang Atoll, Jaluit Atoll, and Ailinglapalap 

 Atoll (Tsuda et al., 1977). Until further intensive collec- 

 tions are made from other islands in Micronesia, it is diffi- 

 cult to make a comparative analysis with the marine flora 

 from other islands. Although it is hardly fair to compare 

 the Enewetak marine flora with that of Guam, a high 

 island located farther west, some inferences can be made. 

 As can be seen in Table 2, there arc slightly more genera 

 known from Guam (118 genera) than Enewetak (106 gen- 

 era), but there are more species reported from Enewetak. 

 Taylor (1950a) described the dominant algae on the atoll 

 and found it was difficult to compare the Marshall marine 

 flora with those of other islands because of the paucity of 



TABLE 2 



Comparison of the Marine Benthic 

 Flora of Enewetak and Guam 



Genera 



Species 



collections from other islands. He did mention that 

 Sargassum was noticeably absent on Enewetak. This genus 

 has yet to be found on any of the atolls in the Marshall 

 Islands (Doty, 1954; Tsuda, 1976). Clearly, the phycologi- 

 cal studies conducted on Enewetak Atoll have provided 

 much of the information on the marine benthic algae 

 within Micronesia. 



Locations of the early collection sites are available in 

 the Departments of Botany and Invertebrate Zoology at 

 the B. P. Bishop Museum. 



REFERENCES 



Bakus, G. J., 1967, The Feeding Habits of Fishes and Primary 



Production at Eniwetok, Marshall Islands, Micronesica, 3: 



135149. 

 Calvert, H. E., C. J Dawes, and M. A. Borowitzka, 1976, Phylo- 



genetic Relationships of Caulerpa (Chlorophyta) Based on 



Comparative Chloroplast Ultrastructure, J Phi>col.. 12: 



149162. 

 Dawson, E. Y., 1957, An Annotated List of Marine Algae from 



Eniwetok Atoll, Marshall Islands, Pac. Sci., 11: 92-132. 

 Doty, M. S., 1954, Distribution of the Algal Genera Rhipilia and 



Sargassum in Ihe Central Pacific, Pac. Set., 8: 367-368. 

 Drouet, P., 1968, Revision of the Classification of the Oscilla- 



toriaccae, Monogr. Nat. Acad. Sci. Phila.. 15: 1-334. 

 , 1973, Revision of the Nostocaceae with CvHndrical Tri- 

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 and W. A. Daily, 1956, Revision of the Coccoid Myxophy- 



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 Gerber, R. P., and N. Marshall, 1974, Ingestion of Detritus by the 



Lagoon Pelagic Community of Eniwetok Atoll, Limnol. 



Oceanogr., 19: 815-824. 

 Gilmartin, M., 1960, The Ecological Distribution of the Deep 



Water Algae of Eniwetok Atoll, Ecology, 41: 210-221. 

 , 1966, Ecology and Morphology of Tydemania expeditionis, a 



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100-105. 

 Hillis, L. W., 1959, A Revision of the Genus Halimeda (Order 



Siphonales), Publ. Inst. Mar. Sci. Univ. Texas, 6: 321-403. 

 Hillis-Colinvaux, L., 1977, Halimeda and Tydemania: Distribution, 



Diversity and Productivity at Enewetak, Third International 



Coral Reef Symposium Proceedings (Miami), pp. 365-370. 



