NO. 1 TAYLOR : PACIFIC MARINE ALGAE 269 



internodal cortication ; spermatangla forming a layer on the fertile nodes ; 

 carpogenic branches four celled, the supporting cell cutting off an auxili- 

 ary after fertilization from which the gonimoblasts are produced, the 

 carpospore mass in some species more or less completely surrounded by a 

 few involucral branches. 



KEY TO SPECIES 



1. Nodal cortication nearly or quite covering the internodes, the 

 cells more or less in longitudinal rows 2 



1. Nodal cortication clearly restricted and bandlike, the older inter- 

 nodes chiefly exposed 3 



2. Plants rose red, evenly dichotomous with proliferous branches 

 below C. hoodii 



2. Plants blackish purple, unequally dichotomous and so seeming to 

 have a persistent axis with alternating subdichotomous branches 

 C. Eatonianum 



3. Nodes with clearly transverse cells along the lower border . . 

 C. byssoideum 



3. Nodes with cells of the lower border not predominantly trans- 

 verse 4 



4. Fertile nodes much swollen, but the tetrasporangia chiefly cov- 

 ered by involucral filaments; sterile nodes several cells deep . 

 C. fastigiatum 



4. Fertile nodes with the tetrasporangia essentially exposed ; sterile 

 nodes narrow 5 



5. Nodes narrow, of few cells, but chiefly 3-4 in the older segments ; 

 internodal cells about twice as long as broad ; tetrasporangia re- 

 ported to be 75-85 ix long C. personatum 



5. Nodes very narrow, chiefly 1-2, occasionally to 3-4 cells deep, 

 the lower internodes 4-6 times as long as broad; tetrasporangia 

 35-45 II diam C. affine 



Geramium hoodii n. sp.^^® 



Plate 4, Figs. 11, 12 ; Text Figure 1 

 Plants at least to 4.5 cm tall, rose red, fairly regularly and equally 

 dichotomously branched at intervals of 3-10 mm, only moderately taper- 



169 Ceramium hoodii n. sp. — Plantae altitudine ad 4.5 cm vel plus, dichotome 

 ramosae, breves proliferationes infra habentes, cacuminibus forcipatis, diametro 

 infra ad 0.75 mm, supra ad circa 170 n, segmentis supra brevibus, infra ad dupio 

 longiora quam lata, internodis corticatis per cellulas in ordinibus longitudinalibus 

 a nodis descendentes. Planta typica in loco dicto Gardner Bay, I. Espanola, Ecua- 

 dor, legit W. R. Taylor no. 34-407. 31 Jan. 1934. 



