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m.eeU.aph. 5?.THALASSI0PHYT^. 41. Zonar. 341
2. Zonaria atomaria. Speckled girdleweed,
Thallns flat, dilated above, fanshaped, palmate; lobes,
linear, slightly divided.
Ulva atomaria, Woodward in Tr. Lin. Soc. 3, 53 ;
Dictyota zonata, Lamouroux Diss. 25, 1.
Zonaria zonaia, Agardh Dispos. 20,
Sea-coasts.
Thallus yellowish brown, edge not cut.
Engl. Bot. 419.
^. ciliata. Lobes slender; edge fringed, serrated.
Dictyota ci'.iala, Lamouroux Diss.
Ulva atomaria, Engl. Bot. the lower fig.
Ulva serrata, De Cand. Fl. Gall. Syn. 3.
XVII. 42. DICTYOTA. Lamouroux. Dlciyole.
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; lobe»
linear, not cut.
Fucus membranaceus dichotomus graraineus, Raii Sijn. 'lb, 2.
TJUadichntoma., Lightf. Scot. 915; Engl. Bot. 174:.
Dictyota dichotoma, Lamouroux Diss.
Zonaria dichotoma, Agardh Disp. 22.
Sea-coast.
|3. 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. 775, lower fig.
Dictyota implexa, Lamouroux Diss.
2. Dictyota liguluta. Tonguelike dictyote.
Thallus flat, membranaceous, reddish, branched ; branches
dilated, rather forked with obtuse angles, terminating with
straplike fringed segments.
Ulva ligulata. Woodward Tr. Lin. Soc. 3,54; Engl. Bot. 420.
Zonaria ? ligulata, Agardh Disp. 21.
Sea-shores.
XVIII. 43. DICTYOPTERIS. Lamouroux. Dictyoptere.
Thallus flat, membranaceous, midribbed, olive-green,
forked, branched; sporidia in clusters; clusters prominentia
scattered, in a line on each side of the midrib.