quent on the reef.Many Rhodophyceae when growing exposed to strong light show strong color changes: i.e., Wrangelia argus appears nearly black, while Laurencia papillosa changes from blackish-purple through green to yellow, whereas Ochtodes maintains its distinctive bright red color.Family CORALLINACEAE *Fosliella lejolisii (Rosanoff) Howe St. Andrew: 11, 67-536, abundant on Thalassia among coral fragments beyond the inshore reef at 6-12 dm depth; 12, R-230A p.p ., on Amansia.*Fosliella farinosa (Lamouroux) HoweSt. Andrew: 11, 67-582A, R-157, abundant on Thalassia. Doubtless Fosliellas were much more common about Dominica than these collection records would indicate, but Thalassia beds were not conspicuous about the island, and they furnish the chief habitat for these plants.Amphiroa fragilissima (Linnaeus) Lamouroux St. Andrew: 11, 67-552, R-175, attached to rocks as the common turf-forming element of the inshore reef. St.Mark; 6, 67^36, on rocks along the peninsula to Scotts Head.
Amphiroa breviarticulata AreschougGrieve (1909, p. 12) reports this without recording a definite station. The supporting specimen consists of a very few segments which do not seem to be T. breviarticulata or A. fragilissima, but possibly might be A. beauvoisii, entangled among Centroceras filaments. * Amphiroa rigida Lamouroux, var. antiUana Borgesen St. Andrew: 11, 67-533, locally common as attached to rocks and coral beyond the inshore reef at 6-12 dm depth.
*Corallina cubensis (Montagne) KiitzingSt. Paul : 1, 67-371, scarce as drifted ashore.