98 University of California Fublications in Botany [Vol. 6 



ranges along the coasts of Lower (Baja) California and Southern 

 California from La Paz to San Pedro, and may be expected as far 

 north as Santa Barbara, California, at least. 



Scinaia Johnstoniae is a robust, thin-walled species, differing in 

 aspect from the preceding species. The epidermal layer and the 

 hypodermis, both distinguish the species from others in this same 

 subgroup but are much like those of Scinaia latifrons. Scinaia 

 Johnstoniae, however, appears to be cylindrical and the cystocarps 

 are scattered through the superficial layers of the frond. The differ- 

 ences between Scinaia Johnstoniae and Scinaia japonica, referred to 

 this same subgroup, will be discussed under the latter. 



Scinaia japonica sp. nov, 



Plate 11, figs. 16-18. 



Scinaia furcellata Okamura, Icones of Japanese Algae, plate HI, 1907 (not Ulva 

 furcellata Turner). 



Plant of a dark red opaque color, 15 cm. high. 9-11 times dichoto- 

 mous, moderately broad, 1-3 mm. in diameter (dried) ; axils narrow; 

 substance dense (in appearance) cartilaginous; axis invisible (dried) ; 

 cystocarps invisible (dried) ; — axial strand stout, of numerous large 

 filaments and few slender filaments; epidermis of large colorless cells, 

 or utricles, and very scanty slender colored cells ; utricles large, 

 uniform, closely placed, with flattened outer ends, 5-7-gonal in surface 

 view (T), palisade-like in section, 30/x (R) by 8-12/a (T), with radial 

 walls fmely wrinkled thus showing delicate striae (in sections of dried 

 specimens m'cII treated with KOH) ; hypodermis of 2-4 layers of 

 globular cells ; eorticating layer thin of sparse slender filaments ; 

 antheridia not seen ; cystocarps globular-pyriform with short, abruptly 

 tapering, very short neck, 400/a (T) by 300-350/i, (R) ; gonimoblasts 

 very numerous, slender, radiating from a distinct cellular placental 

 tissue, abjointing successively oblong spores; periderm of 5-7 layers, 

 pseudoparenchymatous. 



Scinaia japonica is founded on a single specimen (Herb. Univ. 

 Calif., No. 90835) collected at IMisaki, Bay of Tokyo(?). Japan, 

 by K. Yendo, in April, 1900, and referred by the collector to 

 Scinaia furcellata. It seems also to be the same plant as the one 

 figured by K. Okamura in his Icones of Japanese Algae (1907, 

 pi. Ill) under Scinaia furcellata. It is not, however, represented 

 by the specimen distributed by Okamura in his Algae Japonicae 

 Exsiccatae under No. 2, at least, so far as the copy in the writer's 



