EISENIA 57 
arborea Aresch., and to the Japanese Eisenia bicyclis (Kjellm.) 
Setchell,* but in our judgment, it should bear a distinctive specific 
name, at least until such time as more proof of identity with these 
or other previously published species can be adduced than is 
furnished by the specimens now available. It apparently differs Е 
from both іп several, perhaps minor, characters, such as the 
commonly longer stipe and the longitudinally rather than reticu- 
lately rugose sporophyls, but probably the most important dis- 
tinctive character is found in the almost complete lack of mucifer- 
ous canals in the stipe—organs that are very abundant and con- 
spicuous in the stipes of both of the species hitherto recognized. 
At least, we have been able to find only two or three such canals 
in the four or five stipes examined—one of which stipes had 
attained a length of 95 cm. Nor have we been able to detect 
canals in the blade and pinnae of no. 71 or in the sterile sporophyls 
of no. 28, but in the fertile sporophyls of no. 151f small canals are 
occasionally found: 
Eisenia Cokeri is perhaps an inhabitant of deeper waters than 
the Californian E. arborea. At least, Setchellt speaks of Eisenia 
at San Pedro and Redondo, California, as being “left partially 
bare by the fall of the tide,” while Coker’s note accompanying one 
of his photographs includes thé remark, “abundant in the Bay at 
5 fathoms.” 
That a plant so large and so abundant as Eisenia Cokeri 
evidently: is, and, furthermore an inhabitant of the harbor 
of Callao, should escape collection and description would seem 
remarkable and almost improbable, yet we find no previous record 
of anything of the sort having been collected on the shores of Peru. 
There is to be considered, however, the Laminaria biruncinata 
Boryt described from Concepcion, Chile, a plant that is currently 
regarded as belonging to Turner’s variety exasperata of the typ- 
ically Australian Ecklonia radiata (Turn.) J. Ag.—a species in 
which the primary lamina is supposed to be persistent. Laminaria 
biruncinata is figured by Bory as having a bipinnatifid or subtri- 
* Univ. California Publ. Bot. 2: 120. 1905. Eisenia arborea Aresch. f. bicyclis 
(Kjellm.) Yendo, Bot. Mag. Токуб 16: 206. 1902. 
T Erythea 4: 131. 1896. 
+ Dict. Class. Hist. Nat. 9: тоо. 1826; Voy. Coquille, Bot. Crypt. тот. pl. 10. 
28. 
18 
