274 DUBLIN UNIVERSITY 



line. Spores, 8, in rather long and narrow thecce, ovate. Hymeneal ge- 

 latine turning yellow-brawn with tinct. iodine. Paraphyses, extremely 

 narrow-filiform. On the surface of decaying trap-rocks, Crow Glen, 

 near Belfast, April, 1838 ; D. Moore. Plate XXXI., Pig. 1, a, b, c. 



This fine lichen, the apoihecia of which are as large as, and similar 

 in appearance to those of L. contigua (Fr.), whilst the thallus, as Mr. 

 Moore justly remarks, reminds one of Lecanora vitelline/, (Ach.), jNy- 

 lander has pronounced, from a scrap I sent him, "forte nova" and not 

 being able to find any description to accord, I have named it after its 

 discoverer. I am not aware of any British species with which it is 

 likely to be confounded. 



46. L.parasitica (FIL). L. inspersa (Tul.) (Leight., L. B. Exs. 183.) 

 On crust of Pertusaria communis; on fir at Blarney, Cork ; one specimen 

 only found. 



47. L. sanguinaria (Aek). Dublin Mountains ; Admiral Jones. 



Dr. Harvey exhibited to the meeting specimens of an Alga from 

 Western Australia, regarded by him as the type of a new genus, to be 

 named Cliftonia, a genus which would also comprehend the little known 

 and very rare Amansia semipennata of Lamouroux, a figure of which was 

 shown to the Members present. Dr. Harvey proposed to place the new 

 genus in the proximity of Amansia and of Claudea ; to the former of 

 which it was allied by the nature of its cellular structure, and to the 

 latter by the peculiar evolution of the frond. Claudea was described as 

 consisting of several successive series of very narrow linear, mid-ribbed, 

 secured leaflets, whose apices anastomosed with the midribs of the 

 leaflets placed next above them. In Cliftonia the frond is likewise 

 composed of secured leaves and leaflets, but they do not anastomose into 

 a network, and the opposite sides of each leaflet are differently evoluted. 

 If we take the costa or rib of the leaflet as an axis, then we observe 

 that, at one side of the costa the leaflet has an undivided, semi-lanceo- 

 late, perfectly entire-edged lamina, composed of oblong, hexagonal cells ; 

 at the opposite side it has no expanded lamina, but a double row of sub- 

 horizontal, slender, filiform, articulated, and four-tubed ramuli, resem- 

 bling in structure the ramuli of a Polysophonia. The general habit of 

 the frond, omitting the anastomosis of the leaflets, is strikingly similar to 

 that of Claudea, so that Cliftonia may almost be regarded as a free- 

 branched (not networked) Claudea ; and would, therefore, stand related 



