— 147 — 



Bryopsis hypnoides Lamx. 



Lamouroux, Mémoire sur trois nouveaux genres de la famille des Algues 

 marines (Journ. de Bot., vol. II, p. 135); J. Agardh, Till Algernes Systematik VIII, 

 Siphoneæ, p. 27; Vickers, Phycologia Barbadensis, PI. 53. 



Only a few specimens are found growing in shallow water 

 upon the roots of the mangroves. 



St. Croix: Ghristiansteds Lagoon. 



Br. plumosa (Huds.) J. Ag. 

 J. Agardh, Till Algernes Systematik, VIII, Siphoneæ, p. 27. 

 Of this species I have found the following forms. 



var. ty pica. 



Some of the specimens referred to this variety were several 

 times branched bringing them near to forma arbuscula J. Agardh 1. c. 



This var. is very common especially in sheltered places, in 

 lagoons etc. where it occurs in large bushes upon the roots of the 

 mangroves. 



St. Croix. Christiansteds Lagoon, Saltriver; St. Thomas, 

 Crum Bay, St. Jan, Cruz Bay. 



var. pennata. 



Bryopsis pennata Lamouroux, 1. c, p. 134. J. Agardh, 1. c, p. 23. Vi- 

 ckers, Phycologia Barbadensis, PI. 52. 



Of this variety some specimens were found which are rather 

 typically developed but a great many specimens were intermediate 

 between this form and var. Harveyana, var. typica and var. Le- 

 prieurii. 



This variety is very common both on more exposed and on 

 sheltered coasts in shallow water near the surface of the sea. It 

 grows most often upon stones and rocks but it is also found on 

 the roots of the mangroves. 



var. secunda Harv. 



Harvey, Nereis Bor.-Am., Part III, p. 32. Bryopsis Harveyana J. Agardh, 

 Till Algernes Systematik, p. 22, Vickers, Phycologia Barbadensis, tab. LI. 



Of this several rather typical forms were found but also many 

 transitional forms occurred, this variety being only a secund form 

 of the typical Bryopsis plumosa. 



10* 



