— 141 — 



var. typica Gepp. 

 Barton, 1. c, p. 27. 



Most of the specimens referred to this variety were in good 

 accordance wilh the figure of Mrs. Gepp, some of the specimens 



Fig. 7. 



Part of the surface of the two specimens of Ualimeda incrassata figured in fig. 6. About 80: 1. 

 The figures indicate the largest diameter of the peripheral utricles in ß. 



had some resemblance with forma 

 tripartita Gepp, I.e., p. 27, fig. 43, 

 though not quite so typically 

 developed as this figure; some 

 others had a little broader joints 

 approaching them somewhat to 

 var. simulans. As to the size of 

 the peripheral utricles, the dia- 

 meter of these in most of the 

 specimens was found to be about 

 40 — 50^, in others cells were 

 found with diameter up to 100^. 



In Christiansted's Lagoon I 

 have found a nice little form 

 which I think deserves to be 

 considered as a new form. 



f. gracilis n. f. Fig. 8. 



Joints small, nearly circular 

 or broad oval and indistinctly rib- 

 bed. Not much calcified and ra- 

 ther flexible. The diameter of 

 the peripheral utricles varies from 

 40-67 p. The filaments of the 

 central strand communicate at 

 the apex of joints by means of 



pits. Of the forms described by Fi £- 8 - Halimeda incrassat a ^ (Ellis et 



Solander) Lamx. forma gracilis no v. f. 

 Mrs. Gepp 1 think it comes About i : i 



