NO. 1 DAWSON : MARINE RED ALGAE OF PACIFIC MEXICO 123 



5. Tetrasporic conceptacles normally non-antenniferous, at least 



predominately so 7 



6. Branching from main axes more or less strictly distichous- 

 pinnate C. gracilis var. gracilis 



6. Branching from main axes prominently but irregularly ver- 



ticillate C. gracilis var. verticil lata 



7. Intergenicula of main axes mostly about .75 mm. broad and 1 



mm. long; branching from main axes frequently verticillate 8 

 7. Intergenicula of main axes mostly 1.1-1.3 mm. broad and 1.5- 

 1.7 mm. long; branching from main axes normally strictly 

 distichous-pinnate . . . . C. officinalis var. chilensis 

 8. Main axes percurrent; lateral pinnate branchlets one or 



more times pinnate or digitate 



C. vancouveriensis var. lycopodioides 



8. Branching more or less compact, confused; pinnate branch- 

 lets mostly simple . . . C. vancouveriensis var. densa 

 8. Branching confused; pinnate branchlets pinnate or digitate 

 and (or) the segments in part irregularly lobed or digitate 

 C. vancouveriensis var. aculeata 



CoralHna janioides sp. nov. 

 Plate 9, fig. 5 



CoralHna cubensis (Mont.) Kiitz., as interpreted by Setchell & 

 Gardner, 1930, p. 179. 



Thallis pulvinatis, 1.2-2.0 cm. altis, partibus cylindricis subcylindri- 

 cisve; ramificatione praecipue pinnata, alternata oppositave, irregulari; 

 divisionibus 1-3 ultimatis ramorum attenuatorum pinnatorum plerumque 

 dichotomis ; caulibus circa 200-250 fx diametro, intergeniculorum 300-450 

 fi longis, ad genicula constrictis; conceptaculis circa 300 /x diametro, 

 longiantenniferis. 



Thalli saxicolous, densely tufted, forming small, rounded, more or 

 less corymbose, pulvinate clumps 1.2-2.0 cm. high, consisting of numer- 

 ous, densely arranged, erect axes from the basal stratum, cylindrical or 

 subcylindrical throughout; branching sparse below, becoming denser 

 above, primarily pinnate, distichous or occasionally tristichous, opposite 

 or alternate, irregular, not from every segment, also in part dichotomous, 

 the 1-3 slender ultimate divisions of the pinnate branches usually dicho- 

 tomous; axes about 200-250 /t in diameter below, of intergenicula 300- 

 450 p. long, markedly constricted at the genicula, tapering gradually 



