Pl.ecll.aph. 9.THALASSIOPHYT. 41. Zonar. 341 
2. Zonaria atomaria. Speckled girdleweed. 
Thallus flat, dilated above, fanshaped, palmate; Iobes 
linear, slightly divided. 
Ulva atomaria, Woodward in Tr. Lin, Soc. 3, 53; ‘Engl. Bot. 419, 
Dictyota zonata, Lamouroux Diss, 25, 1. 
Zonaria zonata, Agardh Dispos. 20. 
Sea-coasts. 
Lhallus yellowish brown, edge not cut. 
£. ciliata. Lobes slender; edge fringed, serrated. 
Dictyota ciliata, Lamouroua Diss. 
Ulva atomaria, Engl. Bot. the lower fig. 
Ulva serrata, De Cand, Fl. Gall, Syn. 3. 
XVII. 42. DICTYOTA. Lamouroux. Dictyote. 
Thallus flat, membranaceous, ribless, mostly forked, 
much branched; sporidia immersed in interrupted series, 
or scattered. ' 
1. Dictyota dichotoma. Two-forked dictyote. 
Thallus olive, yellowish, membranaceous, forked; lobes. 
linear, not cut. 
Fucus membranaceus dichotomus gramineus, Rati Syn. 45, 2. 
Ulva dichotoma, Lightf. Scot. 975; Engl. Bot. 174. 
Dictyota dichotoma, Lamouroux Diss. 
Zonaria dichotoma, 4gardh Disp. 22. 
Sea-coast. . 
B. inequalis. Last lobes 3 or 4 times narrower than the 
primary ones. 
y- implexa. Thallus small, lobes very slender, linear, 
entangled. 
Ulva dichotoma, Engl. Bot. 115, lower fig. 
Dictyota implexa, Lamourour Diss. 
2. Dictyota liguluta. Tonguelike dictyote- 
Thallus flat, membranaceous, reddish, branched ; branches 
dilated, rather forked with obtuse angles, terminating with 
straplike fringed seements. 
Ulva ligulata, Woodward Tr. Lin. Soc. 3,54; Engl. Bot. 420. 
Zonaria? ligulata, 4gardh Disp. 21. 
Sea-shores. 
XVIII. 43. DICTYOPTERIS. Lamouroux. Dictyopiere. 
Thallus flat, membranaceous, midribbed, olive-green, 
forked, branched; sporidia in clusters; clusters prominent, 
scattered, in a line on each side of the midrib. 
