Pl. cell. aph. 2. THALASSIOPH YT. 46. Scytosip. 347. 
Conferva foeniculacea, Hudson Fl, Angl. 594. 
Ceramium inflexum, Roth Cat. 3,131. 
Hippuris setaceus, Barrelier Icon. 1123. 
Fucus subtilis, Turner Hist. 2, 34. 
Scytosiphon feeniculaceus, Fl. Dan. 1595, 1. 
Halymenia feeniculacea, Agardh Syn. 38. 
Hutchinsia inflexa, 4gardh Syn. 58. 
Sea-shores; annual; spring. 
ae aggregate, 6 or 9 inches high, pale yellow or 
Olive. 
7. Scytosiphon fistulosus. Fistular leathernpipe. 
Thallus olive, leatherlike, round, threadshaped, simple, 
narrower at both ends. 
Ulva fistulosa, Hudson Fl. Angl. 569; Engl. Bot. 642. 
Conferva fistulosa, Roth Cat. 3, 169. 
Chordaria Filum 8, Agardh Syn. 14, 
Scytosiphon fistulosus, 4gardh Disp. 24. 
Sea-shores attached to rocks. 
Thalli numerous, flexuous, gelatinous; sporzdia four to- 
gether, disposed longitudinally. 
d. Thallus olive ; sporidia clustered. 
8. Scylosiphon filiformis. Threadlike leathernpipe. 
Thallus reddish brown, gelatinous, soft, round or com- 
pressed; lLranches scattered, mostly simple, long. 
Conferva filiformis, Fl. Dan. 1480. 
Ulva filiformis, Hudson Fl. Angl. 570. 
Ulva purpurascens, Engl. Bot. 641, not of Hudson. 
Ulva compressa purpurea, dgardh Syn. 45. 
Sea-shores; annual; spring and summer. 
Thallus 6 inches high; lranches alternate, rarely slightly 
branched. 
9. Scytosiphon Turnert. _ Turner's leathernpipe. 
Thallus yellowish brown, membranaceous, finely reticu- 
lated, round, threadshape, simple, attenuated at bottom, 
very obtuse at top. 
Ulva Turneri, Dillw. in Engl. Bot. 2570. 
Gastridium Opuntia, Lynghye Hydr. Dan. 71. 
Sea-shores on rocks and plants; annual; summer. 
Thalli aggregate,.1 to 6 inches long, rarely globose ; 
sporidia in clusters. 
