PI. cell. aph. 2.THALASSIOVHYTM. 45. U Ivu. MS 
Rocks on the sea-shore. 
Thalli gregarious, slenderer at bottom. 2-forked or pal- 
mate with 2 or 3 lobes. 
,S. marginifer. Thallus oblong, mostly simple, edge pro- 
liferous. 
Ulva caprina, FI. Norv. 2, 126. 
y. laciniata. Thallus finely jagged; lobes linear. 
Ulva delicatula, Gunn FI. Norv. 8. 
Fucus delicatula, FI. Dan. 1190. 
Fucus laciniatus, Wahl. 497. 
12. Ulva, sobolifera. Young-bearing laver . 
Thallus rose-red, membranaceous, flat, palmately lobed; 
edge proliferous ; lobes dilated, tip many-cut, toothed. 
Fucus soboliferus, FI. Dan. 1065 ; Engl. Hot. 2133 ; Turner Hist. 1, 97. 
Halymenia sobolifera, Agardh Syn.3 6. 
Ulva sobolifera, Lyngbye Hydr. Dan. 27. 
Sea-shores. 
Thallus 3 to 6 inches long, branched. 
XXI. 46. SCYTOSIPHOM. Lyngbye. Leathernpipe. 
Thallus round, tubular, continuous, even, branched or 
simple, leatherlike, membranaceous; sporidia solitary or 
crowded, scattered over the whole surface of the thallus.; 
stirps 0. 
a. Thallus green , membranaceous. 
1. Scytosiphon intestinalis. Gut leathernpipe . 
Thallus light green, membranaceous; tube simple, bent, 
wavey, puckered. 
Ulva marina tubulosa, intestinorum figuram referens, Rati Syn. 62, 4. 
Ulva intestinalis, Lin. S. P. 1632. 
Conferva intestinalis, Roth Cat. 1, 159. 
Scytosiphon intestinalis, Lyngbye Hydr. Dan. 67. 
Stagnant fresh-waters, and the sea-shore. 
Thalli aggregate, resembles the intestines of animals as 
it floats on the water. 
/3. crispus. Thallus compressed, wrinkled and crisp. 
Ulva intestinalis, Roth Cut. 1, 159. 
Thallus olive green, leatherlike. 
2. Scytosiphon compressm. Compressed leathernpipe . 
Thallus dark green, membranaceous, round, threadlike, 
tubular, branched, compressed ; branches scattered, simple, 
decumbent. 
