ECOLOGY AND TAXONOMY OF Halimeda 



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Fig. 38b. H. lacunalis f. lata, showing small holdfast, thickened basal segments and 

 multi-branching near the base, all characteristic features. (Specimen from the 

 Marshall Islands, Enewetak Atoll, pass between Alembel and Lojwa Islets, —2m 

 to —3 m, 18X1175, Hillis- Colin vaux. Scale bar is 2 cm. (Photograph by The 

 Ohio State University Department of Photography.) 



waters of an inter-island channel (Section X) where it grew 

 erect on the seaward and leeward faces of the rock substrate, or 

 protruded slightly from rock crevices. The thalli were also attached 

 near the eroded bases of rock, under miniature overhangs. Dwarf 

 forms of f. lata occurred at these sites also. 



Halimeda lacunalis f. lacunalis was not encountered at these 

 sites, and seems to be the rarer of the two. 



Geographic distribution. For lacunalis f. lacunalis north-western 

 Pacific Ocean; for f. lata western Indian Ocean; north-western 

 Pacific Ocean. 



