OLIVE-GREEN AND BROWN SEAWEEDS 71 
narrow lobes, the clefts extending nearly or quite to the base ; olive-green, 
with concentric zones of darker color; edges thin and bordered with a 
dark line. Found in southern California and in tropical and subtropical 
seas. 
Genus Taonia 
T. atomaria. Spreading, fan-shaped frond; clefts irregular and not 
extending to the basal stem; spores arranged in dark wavy lines and 
spots on the frond, giving it a mottled appearance and beautiful grada- 
tion of color. ‘Found in tropical seas. (Plate XIII.) 
Genus Padina 
P. pavonia, the peacock’s-tail. Frond broadly fan-shaped; sub- 
stance between membranaceous and leathery; powdery on the outer 
surface ; deeply and variously cleft or entire; several lamine emanating 
from a stalk-like base ; each lamina fan-shaped ; concentric lines numer- 
ous; variegated in zones. This beautiful alga is always regarded as a 
prize. It is found on stones at low-water mark, and is not uncommon 
south of Charleston, South Carolina, but is more luxuriant in tropical 
seas. (Plate XIII.) 
Genus Haliseris 
The sea-endive. 
HI. polypodioides. Fronds flat, forked, notched on lower part; di- 
visions about one quarter of an inch wide ; distinct midrib ; olive-green ; 
grows in tufts. It is found in North and South Carolina, and is abun- 
dant on the Florida Keys. (Plate XIV.) 
ORDER CUTLERIACEE 
Genus Cutleria 
C. multifida. Frond erect, flat; branches in a forking manner; 
ultimate branches fine and short, and with branchlets on the tips. _ This 
species resembles Taonia. It is found in Southern waters. (Plate XIV.) 
ORDER FUCACEZ 
Genus Himanthalia 
H. lorea, the sea-thong. A cup-shaped base, from the center of 
which arises a flat, strap-like frond one fourth to one half of an inch 
wide and two to twenty feet long, branching dichotomously (or by 
forking), and dotted with pits, or conceptacles, in which the spores are 
formed. Found in the extreme North. 
