I 2 



Khipocephalus. p. 91). 



tpitulum. Stipes compound, encrusted, percurrent 



which are either a) normally small, imbricate, 



rally into a series ol verticillate overlapping collars, fila- 



ed in one plane and laterally coherent; <>r 6) much less 



penicilloid in habit but having an apical cup shaped depression 



in w four youngest flabellules, fïlaments of flabellules dichotomously 



ent, but contiguous. Supra-dichotomial constrictions even. 



13. Udotea. p. 



enerally flabellate, rarely excentrically subinfundibuliform, stipitate. Stipes 



either monosiphonous, or compound and corticated. Frond monostromatic, distromatic 



or p I or corticated, composed of fïlaments radiating from stipes to margin 



ither contiguously subparallel, thinly calcified, and not emitting lateral appendages or 



emitting acute or obtuse or truncate papillae, or , medullary fïlaments separated from one 



another and emitting more or less abundant simple or divided lateral (or pseudo-lateral) branchlets 



or protu >, which are ai ipitate or digitately decompound, and serve either to hold 



iments l r or to form a cortex, thickl) calcified. Constrictions even or uneven. 



14. Halimeda. Sec reference on p. 1 . 



Plant thickly calcified, composed of simple or branched subcomplanate chains of Battened, 



cylindrical articuli of various shapes and si/es. Each articulus composed of a medullary plexus 



filaments, and a pseudo-parenchymatous cortical layer formed of laterally coherent 



pyriform or clavate utricles branch-endings) more or less inflated and truncate above. In surface 



more or less hexagonally areolate. Sporangia in racemes on dichotomous 



filami __•■ or face of articuli. Constrictions long-necked, even (where present). 



III. I in \i . 

 15. Codium. p. 1 



alcified, green, spongy, varied in form, pulvinate, globose, elongate, cylindrical, 



ple or branched, composed of a loose felt-work of medullary fïlaments, and a 



us, but not adherent, shortly clavate -reen inflated utricles (branch-endings . 



16. Pseudocodium. Si reference on p. 



cylindrical, branched, composed of a loos,- felt-work of longitu- 

 medullary fïlaments, and a pseudo-parenchymatous cortical layer 

 reen inflated utricles (branch-endings) truncate above. 

 mally areolate. 



