320 9. FHALASSIOPHYTA. — Pl. cell. aph. 
Thallus confluent, flat, ribbed, forked ; 
vesicles innate or 0; apothecia terminal ,..... Fucus. 74. 
Thallus confluent, compressed, ribless ; 
vesicles innate; apothecia pedicelled...... Hauiprys. 75. 
Thallus jeaflike, branched ; 
vesicles innate; apothecia terminal ....... Mackata. 76. 
Thallus \eaflike, branched ; 
vesicles pedicelled, globular .......... BaccaLania. 77. 
Thallus confluent; vesicles pedicelled, 
podshape; apothecia lateral)... . 0.1.6. SILIQUARIA. 78. 
Ke. Sporidia scattered in the swollen. tips of the branches. 
Thallus threadlike, forked ........ FurcELLARIA. 79. 
A. Ceramipexz. Thallus threadlike, membranaceous, 
or leatherlike, tubular, jointed ; joints all formed of a single 
tube ; knots generally pellucid ; sporidia enclosed in a naked, 
or involucrated capsular theca.— Generally rose-red, rarely 
brown or green, mostly marine. 
J. 26. MESOGLOJA. Agardh. ? Slime-gut. 
Thallus threadlike, jointed, forked; branches springing 
horizontally from an imaginary central axis; the whole 
forming a branched, threadlike, olive, gelatinous mass ; 
inner part very compact, outer looser; éhece ovate at the 
end of the threads, surrounded by the swollen beadlike 
branches.— Marine. 
Mesogloja vermiculata. Wormlike slime-gut. 
Mass much branched, cylindrical; branches scattered, 
crooked, attenuated, mostly divided; thallus. branched ; 
branches alternate; joints rather longer than broad; knoés 
contracted. 
Rivularia vermiculata, Engl. Bot. 1818. 
Sea-shores; July and August. 
Mass 4 to 9 inches long, olive-brown, very unequally 
branched. It differs from the M. vermicularis of Agardh, 
Syn. 126, and Lyngbye Hydr. Dan.165, by the lower joints 
deing 3 or four times as long as broad, and the mass not 
being so much branched. 
