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362 58.Tethya. S.THALASSIOPHYT^. PLcell.apk.
1. Tethya verrucosa. War ted tethya.
Thallus globose, externally warted, internally fibrous;
Jibrous in bundles, stiff, asbestine, radiating.
Alcynniutn Lj r.cuiinm, Lin. Syst, Nat. I, 1295?
Alcyoiiiiim Auiaiitium, Pallas Zooph. 357 ?
Spongia verrucoba, Montague XVern. Tr. 2, 117.
Tethya Lyncurium, Lamarck Hist. 2, 386?
Sea-shore.
Thallus more than an inch in diameter, yellowish, slightly
compressed, uncoated at bottom where it adheres to the
rock, by which the asbestine spicules are shown.
2. Tethya pilosa. Hairy tethya,
Thallus globose, fleshy, covered with short, thick-set
hair, internally fibrous ; Jihres in bundles, stiff, asbestine,
radiating.
Tethya piilvinata, Lamarck Hist. 2, 386.
Spongia pilosa, Montague Wern. Tr. 2, 119.
Sea-shore.
Thallus not quite an inch diameter.
S. Tethya P penicilliformis. Pencil-like tethya,
Thallus yellowish, spreading horizontally ; surface tubebearing;
tubes upright, white, flexible, fibrous; fibres entangled.
Spongia Penicillus, Montague Wern. Tr. 2, 95.
Sea-shore.
Perhaps only a species of tethya enwrapping a tubular
sponge.
I. Floride^. Thallus continuous, leatherlike or membranaceous,
formed of interwoven longitudinal fibres, rose-
red, sometimes growing white in the air ; sporidia either
immersed in the substance of the thallus, or in capsular
or tubercular thecte, rarely intermixed with jointed fibres.
XXXIV. .59. DELESSERIA. Lamouroux. Delesser,
Thallus flat, membranaceous, regularly veined ; sporidia
immersed, scattered in the marginal processes of the ribs
and in roundish spots in the thallus.
1 . Delesseria son^uiuea. Blood-red delesser,
Thallus round at bottom, branched; lohes distinct, oblong,
ovate, simple, not in the least cut.