• ton n diameter, slightly or nol al all constricted just above a djchotomy, 



ely protruding; stipe similar to the capitulum in structure, 

 and firm» I [s. 137, 1 ; 



parius and t '. luteofuscus are dis< ussed under the latter spe, [< 



Börgesen 



in naturh. Foren. Kjöbenh. [908. p. 44. 



Crouan in Ma/r & Schramm Algues de la Guadeloupe 1S70 — jj. p. 88. 

 1 ] G. Agardh 'l'ill Alg. Syst. Y. 1887. p. 

 I li I oni Syll. Alg. 1. 1889. p. 5 1 Z. 

 -.:. .■ Murra) in Journ. of l>"t. XXVII. [889. p. 2 



ca Howe in Buil. Torrey Bot. Club \X.\1\'. 1907. p. 513. 

 ïhalus luteofuscus A. 81 E. S. Gepp in Trans. Linn. Soc. (Bot. VII. [908. p. 177; and 

 op. cit. Zool. XII. [910. p. 387. 



ïhalus luteofuscus Collins The Green Algae of North America in Tufts College Studies II. 



//,.■ lNTIC. Guadeloupe, St. Martin, anse du Marigot, dans Ie sable, Mazè n" 1904 in Herb. 



Mus. Brit.! - also .]/..■ and 1403. — Sine loc. Herb. Chauvin\ St. Thomas, Bör- 



■in'. in 20 — 30 meters. 



Plants varying in length to aboul ij cm., green or brown. Root-mass bulbous to elongate. 



Stipes short and simple, or longer and once or twice dichotomously branched, up to 9 cm. 

 long, 2—6 mm. wide; the branches flattened above and expanding gradually into the frond. 



Fronds 2 — 6 cm. long, 1 — 7 cm. wide, cuneato-flabellate or spathulate, or suborbicular, 

 sometimes zoned; colour dark-green to yellowish-brown ; margin subentirc to eroso-lacerate ; 

 fragile when dry. 



Main filaments of frond about 30 — 75 y., more or less parallel, orange-brown, cylindrical 

 or irregularly and slightly constricted, repeatedly dichotomously divided at irregular intervals, 

 branchlets pseudo-lateral, of unequal length, thinner, tapering, densely and dichotomously sub- 

 divided at the apex. Apical ramelli 6 — iov. in diam., pallid, interwoven into a dense pseudo-cortex. 



Filaments of stipes much resembling those of frond. [Figs. 32 — 35]. 



No description of tliis species was published until 1907. when I >r. ll"\\i loc. cit.) 

 supplied the deficiency. I lis diagnosis was drawn from Mazé's n' 1403 preserved in the her- 

 barium of Mons. Bornet. Our own description was taken principally from Mazé's n" 1904 

 (fig. f which there are two examples in the herbarium of the British Museum. We also 



found a specimen of it in Herb. Chauvin, but without name, number or locality; frond-filaments 

 " his plant are shown in fig. 34. 



Dr, 1 . Börgesen collected .1 fine example of this species at St. Thomas, Wesl Indies, 



pth of 11 — 16 fathoms. He discusses it in detail (loc. cit. pp. 39 14), identifying it 



iria luteo-fusca Crouan, and comparing it with c'. scoparius Howe, with which it 



in structure, differing merely in external habit (compare figs. 32 and 137). 



very probable that C. scoparius is a form of C. /utio-fitsdts "developed under 



