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Ser. ClILOllOSPEllMEÆ. Fam. Rimdariea.
P l a t e LXVIII.
RIYULARIA NITIDA, Jg.
0 EN. Chak. Frond globose or lobed, fleshy, firm, composed of continuous
radiating filaments, annulated within, and springing from a spherical
globule. E ivulaeia,—^so named by Eoth, in allusion to the lluviatilo
habitat of some of the first discovered species.
E i v u l a e i a nitida ; frond (large), gelatinoso-coriaoeous, lobed and plaited,
often bullated, lubricous, shining deep green, filaments simple, very
much attenuated.
E i v u l a e i a nitida, Ag. Syst. p. 35. Harv. in Hook. Br. FI. vol. ii. p. 393.
Harv. in Mack. FI. Hib. part 3. p. 335. Wyatt, A lg . Banm. no. 50. Harv.
Man. p. 152. F a il. 3rd Suppl. p. 12.
E iv u l a e ia b id la ta , Berk. Gl. Alg. t. ii. f, 1. J. Ag. Alg. Medil. p. 9. Fndl.
3rd Suppl. p. 13.
SoYTOCHLOEiA nitida, Harv. in Hook. Br. FI. I. c.
A l c y o n i d i u m bullatum, Lamour.
P h y sa o t is lobata, KiiU. Blmjc. Gen. p. 236. t. 4 , f. 5.
H a b . On marine rooks, at lialf-tide level. Annual. Summer and Autumn.
Common on the southern shores of England, and south and west of
Ireland.
G e o g e . D i s t e . Baltic Sea. Atlantic shores of Europe. Mediterranean Sea.
D e s c e . Fronds, from i an inch to an inch or more in diameter, tremelloid,
tufted or gregarious, much lobed and sinuated, at first compressed, and
filled witb soUd gelatine ; afterwards hollow and inflated. Substance very
firm and elastic, not easily torn, lubricous and subgelatinous to the touch.
Colour a deep, but very vivid green. Filaments simple or pseudo-branched,
wavy, laxly set in the interior of the frond, densely packed towards the
surface, tapering to a very long, setaceous point, densely annulated within.
Striæ very conspicuous.
This is the largest marine species of Ltivularia on the British
shores, ornamenting, at the end of the summer, perfectly barren
masses of rock with its bright-green glossy patches. On the
western shores of Ireland it is very common as far north as
Galway, and perhaps further ; but has only, that I am aware of,
been observed on the southern shores of England. Yet it inhabits
the Baltic Sea. It probably, therefore, exists in many
places on our shores, where it has been overlooked.
The genus Bivularia, as originally proposed by Both, cons
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