in South America and the Islands of the Pacific. 445 



rather large, ^^^jth of an inch in diameter, obscurely hexagonal, mi- 

 nutely pubescent within ; margin, even in those portions of the hy- 

 menium which are horizontal, but slightly toothed where the pores 

 are at all oblique. 



This very fine species, which has just the habit of Stereum ostrea 

 as figured by Nees von Esenbeck, approaches somewhat in character 

 to Hexagona tenuis, but there is not the slightest cinereous tinge, and 

 the whole habit is different. The species however to which it is near- 

 est is Hexagona polygramma, Montafi,ne, of which I have an excellent 

 specimen from the Neel-gherries. But though its colours are nearly 

 the same, it is a much more even plant, without any of the little raised 

 lines which characterize the Indian species. It is more frequently 

 zoned and in a different way ; it is thicker and rigid, not coriaceo- 

 membranaceous ; the pores too are much smaller. Individuals pro- 

 bably occur with a lateral stem. 



Plate IX. fig. 2, a, Hexagona fusciafa, nat. size; b, under-side of a 

 young specimen. 



7. Laschia infundihuliformis^ n. s. Pileo infundibuliformi, 

 sublobato, glabro, minute striato ; alveolis plus minus elongatis, 

 ad basin stipitis obesi ex dissepimentis denticulatis hispiduli 

 decurrentibus. Darw. No. 247. 



On rotten wood in forest. Rio Janeiro. May 1832. 



Whole plant gelatinous, flaccid, yellow-brown, very thin and deli- 

 cate, half an inch broad, quite smooth, but minutely striate, infundi- 

 buliform, slightly lobed, at length split on one side. Stem a quarter of 

 an inch high, confluent with the pileus. Hymenium favoso-alveolar ; 

 alveoli angular, more or less elongated, especially towards the stem, 

 where they become linear and extend to its base ; dissepiments ob- 

 tuse, those of the stem minutely denticulate, so as to give it a slightly 

 hispid appearance. 



Plate IX. fig. 3. a, Lascfda infundibuliformis, nat. size; i>, ditto mag- 

 nified J c, a section to show the form of the edge of the dissepiment. 



8. Cora pavonia, Fr., Darw. No. 347- 



Highest peak of Fernando Noronha. 



9. Radulum palmatum, n. s. Carneo-rufum ; subiculo ef- 

 fuso maculas irregulariter ellipticas demum lobatas efFormante; 

 processibus hymen ii primo aculeiformibus, dein palmatis mul- 

 tifidis compressis. Darw* No. 463. 



On orange-trees. Rio Janeiro. May. 



Forming, by the confluence of several small, effused, more or less 

 elliptic spots, lobed patches, which are from 1 to 2 inches long. Sub- 

 iculum tomentose, from which after the manner of a lichen arise 

 numerous erect, minutely tomentose processes 1 to 3 lines high, 

 which are at first cylindrical and setiform, but soon become conflu- 

 ent, compressed, dilated and palmate. The whole plant is of a rufous 

 flesh-colour, which probably in the fresh plant inclines to scarlet. 

 This exceedingly pretty species, which is very different from any with 



