NO. 1 TAYLOR: PACIFIC MARINE ALGAE 67 



ensis n. sp.^" — Plant tufted, to 15 cm tall, filaments divaricately branched 

 and entangled below, slightly moniliform, above erect and dichotomously 

 branched, the branches erect and articulated on the truncated end of the 

 supporting segment below; filament diameter 138-416 /x. Murray Is., 

 Torres Straits, collected by H. L. Clark, Oct. 1913, in the herbarium of 

 the New York Botanical Garden, TYPE. This is a plant still coarser 

 than the proposed C. mexicana, and hardly to be confused with it. 



CODIUM Stackhouse, 1797 



Plant thickly encrusting, lobed, or branched and decumbent, or most 

 commonly erect and bushy from a small cushionlike holdfast, of moderate 

 to large size, dark green, tough and somewhat spongy; coenocytic, com- 

 posed of branching filaments which intertwine to form the massive plant, 

 the filament tips oriented at right angles to the surface and inflated to 

 form peripheral utricles, which are sometimes partly cut off by thicken- 

 ing of the cell membrane at the base, and which commonly bear hyaline 

 branched hairs, and in season, gametangia. 



KEY TO SPECIES 



1. Plants cushionlike or encrusting C. Setchellii 



1. Plants decumbent or erect, with relatively narrow branches 2 



2. Peripheral utricles smooth on the ends 3 



2. Peripheral utricles foveolate; surface of the plant when dried 



distinctly spongy C. foveolatum 



2. Peripheral utricles mucronate; surface of the plant when dried 

 appearing smooth C. fragile 



3. Erect axes simple, or generally sparingly branched quite near 



the base C. longiramosum 



3. Branching distributed, generally abundant 4 



4. Utricles when fully developed over 300 /x diam. C. fernandezianum 



4. Utricles smaller 5 



5. End wall of the peripheral utricles generally thin, commonly less 

 than 6 IX 6 



5. End wall of the peripheral utricles generally thick, commonly 

 more than lO/x 7 



S'^ Chlorodesmis torresiensis n. sp. — Plantae caespitosae, ad 15 cm altitudine, 

 filamentis infra divaricate ramosis implexisque, submoniliformibus, supra erectis 

 atque dichotome ramosis, ramis erectis, parte in extrema truncata segrnenti susti- 

 nentis articulatis; filamento 138-416 n diara. Planta typica in loco dicto Murray 

 Is., Torres Straits, legit H. L. Clark, Oct. 1913, in herb. New York Botanical 

 Garden, 



