536 BULLETIN OF THE BUREAU OF FISHERIES. 



ee. Filaments at first consisting of single rows of cells, the upper cells of the 



filaments soon divided longitudinally, forming tubes; unbranched.. .BANGIA (p. 464). 



eee. Filaments consisting throughout of several rows of cells i. 



i. Frond erect throughout, branching in all directions POLYSIPHONIA (p. 502). 



t*. Frond erect, arising from a creeping filament, branching alternately pinnate, 



distichous, giving a zigzag appearance BOSTRYCHIA (p. 506). 



Hi. Fryid creeping, forming a velvety mat with erect branches HERPOSIPHONIA (p. 507). ' 



bbb. Frond terete, at least for the most part j. 



j. Frond regularly dichotomous k. 



h. Frond small, about 3 cm. long and less than i mm. in diameter; horny, tough; 



dark greenish purple GYMNOGONGRUS (p. 477). 



kk. Frond large, 10 to 20 cm. long, 3 to 8 mm. in diameter; fleshy, soft; pink 



Halymenia agardhii (p. 517). 



kkk. Frond large, 9 to 34 cm. long, i to 4 mm. wide, sometimes flattened, sometimes 

 with pinnate branches in addition to dichotomies; cartilaginous, tough, coarse; 



red to purple and dark green Gracilaria multipartia (p. 484). 



kkkk. Frond large, 8 to 18 cm. long, 0.5 to i mm. in diameter; many pinnate 

 branches in addition to dichotomies; ultimate branches beset with numerous 



fine hairs along their sides; red /. 



/. Hairs simple SPYRIDIA (p. 512). 



//. Hairs branched BRONGNIARTELLA (p. 505). 



jj. Frond not regularly dichotomous m. 



m. Frond consisting of a solid stem and ultimate hollow, bladderlike branches 



Chrysymenia uvaria (p. 491). 



mm. Frond hollow, tubular n. 



n. Frond large, up to 30 cm. long and 4 to 5 mm. in diameter; branches constricted 



at the bases Chrysymenia enteromorpha (p. 490). 



nn. Frond 1.5 to 6 cm. long, about i mm. in diameter; constricted at intervals, 



the tube containing transverse diaphragms at these constrictions. .CHAMPIA (p. 492). 

 nnn. Frond i to 3 cm. long, less than i mm. diameter; no transverse diaphragms; 

 branches frequently arched and bearing branchlets principally along con- 

 vex side; arched branches sometimes attached at their tips. . . . LOMENTARIA (p. 491). 



mmm. Frond solid or nearly so o. 



o. Frond small, i to 5 cm. long, 0.5 mm. or less diameter; upright branches arising 



from a creeping stem GELIDIUM (p. 475). 



oo. Frond larger than above p. 



p. Branches beset with numerous hairs along their sides; red DASYA (p. 508). 



pp. Ultimate branchlets constricted at the bases; red or reddish CHONDRIA (p. 498). 



ppp. Branches recurved at the apices or bearing short, pointed, spinelike 



branchlets; green HYPNEA (p. 485). 



pppp. Frond not distinguished by any of above characters q. 



q. Branches arising on stem in two rows, main axis somewhat flattened r . 



r. Texture somewhat gelatinous; branching pinnate throughout; cystocarps 



internal RHABDONIA (p. 480). 



rr. Texture somewhat cartilaginous; branching partly dichotomous; cysto- 



carpe external, conspicuous Gracilaria multipartita (p. 484). 



qq. Branches arising on all sides or at least not in two rows, main axis not 



flattened s. 



*. Cystocarps internal t. 



t. Texture rather gelatinous, soft AGARDHIELLA (p. 478). 



U. Texture rather cartilaginous, rigid EUCHEUMA (p. 481). 



ss. Cystocarps external u. 



u. Texture fleshy-cartilaginous; frond slender, usually mot more than i 

 mm. in diameter, beset with many short fine branch lets, smaller 

 branches long, slender Gracilaria confervoides (p. 483). 



