NO. 1 TAYLOR: PACIFIC MARINE ALGAE 147 



Scinaia Setchellil n. sp.^^ 

 Plate 32 



Plants bushy, to 15 cm tall or more, dichotomously forked to 10-12 

 times successively, rose purple throughout; cylindrical branches to 3-4 

 mm diam. above, 2-3 mm in the lower part of the plant, downwardly 

 little tapered, the apices acute to rounded conical, the axis slightly visible 

 in the lower parts, not visible above; colorless epidermal cells to 21-28 fi 

 diam. in surface view, with small colored cells 6-8 fi diam. occasionally 

 present between them, in transverse section 35-42 fx deep, subquadrangu- 

 lar, the outer wall slightly convex ; hj^podermal cells rounded and large, 

 15-22 fjL diam., mostly in a single layer; axis not large, of larger and 

 smaller filaments intermixed; cystocarps basally attached, the lower goni- 

 moblast cells elongate, the pericarp without filaments penetrating the 

 gonimoblast mass, the ostiole with many short filaments hardly emerging 

 from the opening. 



Ecuador: Archipielago de Colon, dredged several large clumps from 

 27 meters off Post Office Bay, I. Santa Maria, no. 34-288 (cystocarpic, 

 TYPE), 19 Jan. 1934. 



Scinaia Johnstoniae Setchell 



Plants to 23 cm tall, to 10 times dichotomously forked, cylindrical, to 

 3 mm diam. above, 2 mm diam. below, dull reddish purple and darker 

 below, the axis obscure ; epidermis of thin-walled polygonal cells which in 

 surface view are 14-24 /x diam., in section rectangular with the outer face 

 flat, the cells 1 8-25 /x tall ; small colored cells absent from the epidermis ; 

 hypodermal cells round, in a single layer; medullary filaments slender, 

 sparse ; axis of larger and smaller filaments intermixed. 



Setchell 1914b, p. 97, pi. 11, figs. 14, 15. 



The Ecuadorean plants seem taller and more slender than those 

 reported by Setchell, but othervvise agree quite well with his description, 

 except that the colorless epidermal cells seem relatively taller in section 

 than he describes, and colored cells were not seen between them. 



Costa Rica : dredged near Pto. Culebra, no. 34-523 (f), 24 Mar. 

 1934. Ecuador: Archipielago de Colon, dredged at sta. 173 from 9 

 meters' depth off I. Baltra^ no. 34-335 (cystocarpic), 22 Jan. 1934. 



S5 Scinaia Setchellii n. sp. — Plantae fruticosae, ad 15 cm altitudine, ad 10-12- 

 dichotomae; ramis cylindricis, supra ad 3-4 mm diam., infra 2-3 mm, paululum 

 teretibus deorsum, apicibus acutis ad rotundato-conicos, axe infra paulum visibili; 

 cellulis epidermalibus turgidis, ad 21-28 yi diam., 35-42 [x crass., inter quascellulae 

 parvae coloratae interdum videntur; cellulis subepidermalibus plenimque in strato 

 uno, magnis, rotundatisque, 15-22 n diam. Planta tj'pica in loco dicto Post Office 

 Bay, I. Santa Maria, Ecuador, legit W. R. Taylor no. 34-2S8, 19 Jan. 1934. 



