ECOLOGY AND TAXONOMY OF Holimeda 



93 



12. Mature plants relatively small and delicate, to approximately 

 13 cm long; segments commonly subcuneate and sometimes 

 strongly trilobed, to 4mm long and 5 mm broad; peripheral 

 utricles averaging about 27 \xm. in diameter ; commonly associated 

 with opuntia in the reef . . . . . . . . H. goreauii, p. 112 



12. Mature plants to 70 cm long although they may be considerably 

 shorter; segments commonly transversely oblong to depressed 

 ovate, to 13 mm long and 21mm broad; peripheral utricles 

 averaging approximately 37 (xm; commonly associated with 

 cryptica in deeper parts of the reef . . . . H. copiosa, p. 118 



2. List of Atlantic species of Halimeda 



Section Rhipsalis 



H. incrassata 

 H. simulans 

 H. favulosa 

 H. monile 



Section Opuntia 



H. opuntia 

 H. goreauii 

 H. copiosa 



Section Halimeda 



H. tuna 

 H. scabra 

 H. discoidea 

 H. gracilis 

 H. lacrimosa 



Section Crypticae 

 H. cryptica 



G. Species descriptions 

 1. Section Rhipsalis J. Ag. ex De Toni 



Halimeda incrassata (Ellis) Lamouroux 

 Figure 22. 



Corallina incrassata Ellis (1767), Plate 17, Figs 20-27; ElHs and Solander 



(1786), p. Ill, Plate 20, Figs B-^_q, d, d^.g. 

 Corallina tridens Ellis and Solander (1786), p. 109, Plate 20, Fig. a. 

 Halimedea incrassata Lamouroux (1812), p. 186; Halimeda incrassata 



Lamouroux (1816), p. 307; Barton (1901), p. 25, Plate 4, Figs 39, 41-51; 



Hillis (1959), p. 365, Plates 4-6, 12. 

 Halimeda incrassata f. gracilis Borgesen (1913), p. Ill, Fig. 89. 

 Halimeda incrassata f. rotunda Barton (1901), p. 28, Plate 4, Fig. 45. 

 ? Halimeda incrassata f. tridentata Duchassaing ex J. Agardh (1887), p. 86. 

 Halimeda incrassata f. tripartita Barton (1901), p. 27, Plate 4, Fig. 43. 



