NO. 1 TAYLOR: PACIFIC MARINE ALGAE 141 



wide angles, or subalternate, the segments 3-12 mm long; extended as- 

 similatory filaments less than 1 mm long, evenly distributed, or near the 

 tips slightly verticillate ; structurally the axis with a medulla of slender 

 filaments 6-18 /x, rarely 24 fi diam., and a cortex of ill-developed support- 

 ing cells bearing 1-2 assimilatory filaments with well-developed tumid 

 elliptical or elongate-ovate basal cells 45-65 fj. long, 28-40 fi diam., the 

 shafts of the extended filaments 14-16/1, diam. near the base, 16-18 /t diam. 

 above, the cells 2-3 diameters long; intermixed are short assimilatory fila- 

 ments of 2-3 cells, the basal cells like those of the extended filaments, the 

 terminal cells globose or subglobose, 20-34 /a diam. 



Kjellman 1900, p. 51, pi. 4, figs. 4-16, pi. 20, fig. 19, as G. fruticu- 

 losa Kjellm., non (Ellis & Solander) Lamouroux. 



The type of G. fruticulosa is Bahaman, but the name was adopted by 

 Kjellman for a Japanese plant. It is similar to G. subverticillata, but 

 shows little of a verticillate habit, and there are minor differences, in 

 which the Mexican plant is like its western Pacific relatives. 



Mexico: Is. Revilla Gigedo, on intertidal rocks at Sulphur Bay, I. 

 Clarion, no. 34-53 (TYPE), 5 Jan. 1934. 



Galaxaura stupocaulon Kjellman 



Plants bushy, to 6-7 cm tall, the holdfast discoid ; the branches below 

 subterete, villous, above flattened, commonly proliferous, each prolifera- 

 tion encircled by a tuft of extended assimilatory filaments ; segments short, 

 2-7 mm long, 1-2 mm wide, the margins slightly thickened; structurally 

 showing a loose medulla of filaments 7-15 /a diam., bearing a 1-2-stromatic 

 cortex 20-40, rarely 60 [x thick; cells of the inner layer largest and 

 rounded to much compressed, 20-44 ju, tall, 25-50 fi broad ; outer cortex 

 cells bearing the short assimilators, which are composed of simple cylin- 

 drical to obconical or even forked stalk cells 30-36 /a tall, bearing generally 

 two terminal cells, rounded but of variable form, 20-44 /a tall, 20-32 /* 

 diam. ; extended assimilatory filaments about 1 mm long, with one or two 

 tumid basal cells, the shaft cells 15-16 ju, diam., 2-5 times as long as broad. 



Kjellman 1900, p. 75, pi. 14, figs. 1-9, pi. 20, fig. 28. 



Costa Rica: from tide pools near the entrance to the bay, Golfo 

 Dulce, nos. 39-90A, 39-91 J, 39-92A, 26 Mar. 1939. 



longioribus quam crassioribus ; cortice monostromatico, cellulis ovoidei's vel sub- 

 globosis, 32-50 \i diam., filamentos breviores assimilatorios bicellulos ferentibus, 

 eos ex cellula stipitiforrae 12-20 ]x. diam., 12-24 \i long, et secunda terminali ovoidea 

 vel clavata, 28-44 ji longa, 20-28 \x, diam. constantes; filamentis medullae 6-20 |li 

 diam. Planta typica in loco dicto Sulphur Bay, I. Clarion, Mexico, legit W. R. 

 Taylor, no. 34-53, 5 Jan. 1934. 



