H. C. Wood on some Californian Alge. 33 
other cells. In one instance only was I able to detect hairs 
upon these heterocysts. 
The larger filaments are found especially near the base and 
in the other older portions of the frond. Their cells are gen- 
= irregularly elliptical or globose, rarely are they cylin- 
ical 
They are mostly of an orange brown color, and there exists 
a particular gelatinous coating to each cell rather than a com- 
mon gelatinous sheath to the filament. These larger threads 
are apparently produced from the smaller‘filaments by a pro- 
cess of growth. 
Near the base and in the under portions of the fronds, these 
ents are scattered in the homogeneous jelly, in which they 
run infinitely diverse courses. In the upper portions of the 
frond and at some little distance from the base, the adjoining 
cells are very close to one another and pursue more or less par- 
allel courses, with enough firm jelly between to unite them 
into a sort of membrane. 
propose for it the specific name Caladarium, which is suggested 
by its place of growth. There are several species of allied 
- caladarium, sp. nov.—N. thallo maximo, indefinite ex- 
panso, aut membranaceo-coriaceo vel membranaceo-gelatinoso 
vel membranaceo, aut lete viride vel sordide olivaceo-virid 
vel olivaceo-brunneo, irregulariter profunde laciniato-sinuato, 
ultimo eleganter laciniato ; trichomatibus inaqualibus, inter. 
Am. Jour. Sct.—SEconp Series, Vou. XLVI, No. 136.—Juty, 1868. 
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