'286 ALGJE INART1CULAT/E. [NitophyUitm. 



Alg. v. I. p. 178. Grev. Alg. Brit, p. 73. — Fucus alatus, Huds. — 

 Turn. Syn. Fuc.p. 144. t. 160. — (3. angustissima ; frond ex- 

 tremely narrow without any trace of lateral membrane. Turn. 

 Hist.Fuc. t. 160. 



Upon rocks in the sea and larger Algae, frequent. — j3. Scarborough, 

 Mr. Pitchford and Lozie-mouth, Morayshire, Mr. Brodie. $ .?— 4— 6 in- 

 ches long, of a deep rose-colour, with a strong midrib. 



4. D. Hypoglossum, Ag. (proliferous Delesseria) ; frond lin- 

 ear-lanceolate repeatedly proliferous from the midrib with leaves 

 of the same shape and attenuated and acute, with very obscure 

 pellucid simple oblique veins between the midrib and the mar- 

 gin, sphaerical capsules on the midrib of the lesser leaves and 

 oblong spots of seeds near their extremities — Ag. Sp. Alg. v. 1. 

 p m 176. — Fucus Hypoglossum, Woodw.- — Turn. Syn. Fuc.p. 17, 

 Hist. Fuc. t. 14. E. Bot. t. 1396. 



On rocks in the sea and on the larger Algae. © . Fructification, Sum- 

 mer. — 2 — 4 inches to a span long, varying much in the width of the 

 leaflets. 



5. D. ruscifolia, Lamour. (Ruscus-leaved Delesseria) ; frond 

 linear-oblong proliferous from the midrib with leaves of the 

 same shape and very obtuse with pellucid branched bearded ob- 

 lique veins between the midrib and the margin, spheerical cap- 

 sules on the midrib of the lesser leaves and oblong spots of seeds 

 near their extremities. — Ag. Sp. Alg. v. 1. p. 174. Grev. Alg. 

 Brit. p. 76. — Fucus ruscifolius, Turn, in Linn. Trans, v. 6. 

 p. 127. t. 8./. 1, Syn. Fuc.p. 12, Hist. Fuc. t. 15. E. Bot. 

 t. 1395. 



Sea, on rocks and upon Algae, scarce. Norfolk and Suffolk, Devon- 

 shire and Bognor. Bantry, Miss Hutchins. Miltown Malbay, Ireland, 

 Mr. Harvey. ©. Summer.— Plant smaller, the leaves being much 

 shorter than in the preceding species and very obtuse, but quite as 

 broad. The different texture of the frond, arising from the peculiar, 

 oblique, pellucid veins, will afford a further character by which the two 

 may be distinguished. 



25. Nitophyllum. Grev. Nitophyllum. 



Frond plane, delicately membranaceous, rose-coloured, reticu- 

 lated, wholly without veins, or with very slight vague ones towards 

 the base. Fructification ; kemisphserical capsules imbedded in 

 the substance of the frond, and ternate granules forming distinct 



scattered spots Named from the Latin nitor, to shine, and the 



Greek (pvXXov, a leaf; from the glossy surface of the fronds. — 

 This Genus appears to be a natural one; but 1 find the species 

 so difficult to distinguish in tke dried state, tkat I kave re- 

 lied upon Dr. Greville for most of tke characters. Beautiful 

 specimens of nearly tke whole of them I have received through 

 the well known liberality of Mrs. Griffiths. 



1. N. ocelldtum, Grev. (ocellated Nitophyllum); frond with a 



