NO. 1 TAYLOR: PACIFIC MARINE ALGAE 195 



species there is no abrupt transition between flattened distal branches and 

 terete lower ones, as there is in B. dichotoma and B. interrupta. It comes 

 closest, perhaps, to B. calif ornica (Decaisne) Manza, but in that species 

 the lower parts are less extensively terete or subterete, the upper segments 

 are nearly rectangular to obcordate, with the wings projecting forward 

 of the line of articulation, and the conceptacles are smaller and more nu- 

 merous. 



JANIA Lamouroux, 1812 



Plants arising from an inconspicuous disk, freely dichotomously 

 branched, the branches segmented, the segments cylindrical, calcified, 

 separated by uncalcified articulations ; conceptacles usually single in swol- 

 len terminal segments of the main branches, which often continue further 

 growth by the formation of a pair of branches lateral to the conceptacle. 



Suneson 1937, p. 37 (as Corallina rubens). 



KEY TO SPECIES 

 1. Branching wide angled, not congested 2 



1. Branching erect, often congested above 3 



2. Segments generally 50-100 /u, diam., 4-10 times as long as broad 

 J. capillacea 



2. Segments 100-200 p. diam., 2-5 times as long as broad J. adhaerens 



3. Branch tips not compressed 4 



3. Branch tips compressed, expanded J. ungulata 



4. Segments to 135 /z diam. below, and about 5-6 times as long as 

 broad, somewhat more slender and relatively shorter above . . 

 J. arborescens 



4. Segments to 200 /x diam. below and about twice as long as broad, 



120-150 II diam. in the lesser branches J. mexicana 



Jania capillacea Harvey 



Harvey 1853, p. 84; Taylor 1928, p. 206, pi. 29, figs. 2, 10; 1942, 



p. 94. 



Mexico: Is. Revilla Gigedo, littoral pools about Braithwaite Bay, 

 I. Soccoro, nos. 34-28. 34-33, 3, 5 Jan. 1934. Ecuador: Guayas, in 

 tide pools at Pta. Santa Elena, Schmitt no. 530, 17 Sept. 1926. 



Jania adhaerens Lamouroux, prox. 

 Plants spreading, loosely branching at wide angles, segments below 

 190-225 II diam., 0.4-0.8 mm long, little tapered toward the tips, terete 

 throughout. 



