110 COLLINS AND HERVEY. 



a large amount of material from the Florida-West India region, 

 including specimens determined by J. G. Agardh, and can find no 

 line of demarcation between the three species mentioned. Fucris 

 Poitei Lamouroux, 1805, PI. XXX, figs. 2-3, antedates F. Wrightii, 

 but now proves to be a Laurencia, and the next oldest name is Turner's 

 which we adopt. It includes most of the coarse, fleshy or cartilagi- 

 nous Gracilarias of the warmer Atlantic; probably always terete when 

 alive, but often appearing compressed in herbarium material. It is 

 not common at Bermuda. 



6. G. MULTIPARTITA (Clem.) Harvey, 1846-51, PL XV; Fucus 

 multipartiius Clementi, 1804, p. 311. Kemp, July, two specimens 

 in herb. ; Building's Bay, Feb., one small frond, Hervey. 



7. G. DICHOTOMO-FLABELLATA Crouan in Maze & Schramm, 1870- 

 77, p. 218. Mrs. Boggs, 1895; St. David's Island, Feb., May, South 

 Shore, April, Hervey; tetraspores in May. This species varies con- 

 siderably in color and texture, from thin membranaceous and clear 

 red to subcartilaginous and brownish. In the former case the shape 

 and subdivision of the frond are indicated by the specific name; 

 in the latter the division is more irregular. The Bermuda plant as a 

 rule has a thinner frond and narrower segments than the Florida 

 material distributed as P. B.-A., No. 334. We were at first inclined 

 to identify this plant with G. Textorii (Suringar) Hariot, 1891, p. 223, 

 Sphaerococcus Textorii Suringar, 1870, p. 36, PL XXIII, and a speci- 

 men from Province Boshu, Japan, for which we are indebted to the 

 kindness of Dr. K. Yendo, has much resemblance to the Bermuda 

 plant. But the plant figured by Okamura, 1901, p. 65, PL XXIII, 

 and distributed in his Algae Japonicae Exsiccatae No. 13, differs 

 considerably, having a habit more like the common little divided forms 

 of Rhodymcnia palmata. Our plant agrees with Crouan's species, 

 as represented by an authentic specimen in the Museum d'Histoire 

 Naturelle, at Paris, and it has seemed to us better on the whole to 

 retain for the present Crouan's name, under which the plant had 

 already been distributed in P. B.-A. J. G. Agardh, 1889, p. 25, refers 

 to G. dichotomo-flabellaia as a possible synonym of Chrysymenia halij- 

 menioides Harvey, mentioning Chrysymenia dichotomo-flabellata Crouan 

 as perhaps the same; the latter has been distributed as P. B.-A., No. 

 385; it is probable that it is, as suggested by J. G. Agardh, a form of 

 Chrysymenia halymenioides, but the plant distributed as P. B.-A., 

 Nos. 334 & 1931 is certainly a Gracilaria. The following short diag- 

 nosis, in connection with the material distributed as P. B.-A., Nos. 334, 

 1931, will probably give a sufficient idea of the species. 



