30 Rhodora [JANUARY 
ILEA Ag. 
Frond filamentous, hollow, the cells single, or in twos and fours, 
enclosed in the wall of the mother ceil, and arranged in distinct 
longitudinal series in all parts of the frond. 
I. FULVESCENS (Ag.) J. G. Agardh, Till Alg. Syst., part 3, 115, 
1882; Enteromorpha aureola De Toni, Syll. Alg., Vol. I, 131, 1889. 
The only species; characters of the genus. Plate 41, fig. 22, cross 
section ; fig. 23, proliferous branching; fig. 24, surface. ` 
'This plant grows in dense tufts, the filaments usually 5 to 20 cm. 
long, the diameter being seldom over 2 mm. The ftonds are soft and 
gelatinous, the color varying from dark green to brownish or yellow. 
The cells have a distinctive G/ococapsa-like arrangement, and are in 
longitudinal series so distinct that by pressure on the cover glass they 
readily separate, appearing like distinct filaments of one or two cells 
wide. 
It grows best in places where streams of fresh water empty into 
the sea, occupying the space between high and low water marks ; so 
that twice in each day its medium is changed from sea water to quite 
fresh water, and back again. It appears to be common from Maine 
to New Jersey, and is found in salt springs at Sussex, New Bruns- 
wick, 20 miles from the sea (Ganong). Europe, So. Pacific. 
The dimensions given above will cover all accessible specimens or 
records, except that at Cutler, Me., in July, 19o2,the writer collected 
this species with fronds over a meter long and two cm. in diameter, 
and similar specimens were collected by Dr. Farlow in the same 
month at Campobello, New Brunswick. The localities are only 
fifteen miles apart, and near the mouth of the Bay of Fundy. It 
may be that the great range of the tide here furnishes the conditions 
of this unusual development. Ganong (1) 16. Collins (8) 44. 
Capsosiphon aureolus Collins (7) 245. Ulva aureola Collins (2) 
131; (3) 310; (6) 78. Martindale (1) 93. Britton (1) 4or. 
Exsicc. Phyc. Bor.-Am., 264. 
' 
DOUBTFUL REFERENCES. 
ULVA CLATHRATA Pike (1) 106. Bennett (1) 95. Anderson (1) 
218. 
U. compressa Anderson (1) 218. 
U. ENTEROMORPHA Var. COMPRESSA Pike (1) 106. Bennett (1) 95. 
Britton (1) 400. Martindale (1) 93. Hay (1) 33. Hay & Mac- 
Kay (1) 63. 
U. ENTEROMORPHA var. INTESTINALIS Pike (1) ro6. Britton (1) 
400. 
