Pl. cell.aph. 1. HYDROPHYT AL. 21. Cheetoph. 301. 
H. Conrervowes. Thallus cylindrical, threadlike, 
tubular, jointed, simple or branched, uniform or biform ; 
joints pellucid; spore granular, green, scattered in the 
joints; fruit external, but the granules often grow in the 
joints themselves. 
XXI. 21. CHASTOPHORA. Schrank. Chetophore. 
Mass threadlike, branched; threads springing from the 
axis, jointed, branched, growing slenderer, and ending in 
a long transparent hair extended beyond the surface of the 
mass; granules in the joints, sometimes growing while still 
in the mass.—Reddish. 
Chetophora rubra. Red chetophore. 
Mass cylindrical, threadlike, forked; threads branched, 
jointed, red. 
Ulva rubra, Hudson Fl. Angl. 5713 Engl. Bot. 1627. 
Rivularia multifida, Weber and Mohr. Reise, 3, 193. 
Chztophora rubra, 4gardh Disp. ed. 1, 42. 
Chordaria multifida, Lyngbye Hydr. Dan. 51. 
Rocks on the sea-shore; annual; August and September. 
Mass crowded, 3 to 6 inches long, from a callous base; 
tip of the branches rather blunt. 
XXII. 22. LEATHESIA. Leathes. 
Mass globular, leatherlike, gelatinous, brownish ; threads 
branched, jointed, springing from a common basis; branches 
clubshape, blunt; spores scattered in the swollen joints.— 
Marine. 
Leathesia tuberiformis. Tuberous leathes. 
_Mass globular, rather leatherlike, hollow; outer surface 
smooth, brown; ¢dhreads very close, forked, branched; 
branches level at the top; tips clubshaped. 
Tremella difformis, Lin. Sp. Pl. 1626. 
Rivularia tuberiformis, Engl. Bot. 1956. 
Nostoe marinum, Agardh Disp. ed. 1,45. 
Chetophora marina, Lyngbye Hydr. Dan. 193. 
On marine plants; annual; summer. 
XXIII. 23. MYRIODACTYLON. Des Vaux. 
, Myriodactyle. 
Mass elongated or globular, gelatinous, light green; 
threads branched, jointed, springing from a common basis ; 
branches growing finer and ending in a long, hyaline fila- 
ment; knots pellucid. 
