18 ANGIOCARPOUS LICHENS. 



I greatly doubt the correctness of these plants being 

 included in the genus Ejidocarpon. The existence of 

 paraphyses, intermingled with the asci, and their arrange- 

 ment, are precisely similar to what is seen in the patel- 

 lula3 of Parmelia, Lecidea, &c. In the true Endocarpa, 

 so far as I have hitherto observed, there are no para- 

 physes intermingled with the asci, and the contents of 

 the nucleus are decidedly and visibly gelatinous. 



*** Thallus scaly y tartar eous ; sporidia very large, 



13. E. SOREDIATUM, HooJc, Sporidia in asci 2, very 

 large, lineari-oblong, obtusely rounded at each ex- 

 tremity, uniseptate, green-coloured. Plate V. fig. 2. 



Vearucaria sorediata, Borr. E. B. Suppl. 2G12, fig. 2. (1829.) 

 Endocarpon SOREDIATUM, Eook. Br. El. ii. 158. (1833.) 



Rottingdean Cliffs, Sussex ! Mr. Borrer. 



The nucleus is pale, gelatinous, containing in the lower 

 portion a series of clavate or obovate erect asci, without 

 any paraphyses intermingled, over which, from the upper 

 portion, is suspended a quantity of minute, slender, 

 crowded filaments, (as are observable in Endocarpon and 

 Verrucaria generally, being, I presume, the usual struc- 

 ture.) The asci contain each only two very large sporidia, 

 one more elongated than the other, which is shorter and 

 broader, oblong, obtusely rounded at each extremity, with 

 a central septum. The granular contents, or ultimate 

 spores, of a bright green colour, irregular in shape, square 

 or roundish, giving to the cellular membrane or sac of 

 the sporidium an impressed network appearance. When 

 mature, the membrane of the sporidium is ruptured, and 

 the granular contents interspersed amongst the gelatinous 

 mass of the nucleus, which is thus rendered of a green 

 colour. By detaching one of the scales of the thallus, 

 moistening it in water, and working away the adherent 

 soil with a needle, it will be found that the long fibres 

 observable on the under surface, proceed from the central 

 portion, thus rendering each scale, or rather each plant, 

 for the plant is only a scale, subpeltate. 



