and an allied Chilian Species. 41 



the toothed edge noticed by Mr. Darwin, or the gelatinous contents which had perhaps 

 been dispersed by the spirit in which the specimens were preserved. The cells or cups 

 themselves are ovate, lined almost to the top by the hymenium, which is, however, at 

 present not perfectly developed. The substance interposed between the top of the 

 cells and the cuticle is gradually absorbed, and the cuticle itself becomes thinner and 

 tightly stretched over the cavity, and at length bursts and forms a membranous border 

 to the irregular orifice. The margin appears to be a little reflected, but I could not 

 ascertain this point accurately. The hymenium is now perfect, and consists of very 

 slender paraphyses, and abundant, large, slightly flexuous asci, which contain eight 

 sporidia, whose original form could not be made out, as they were contracted by the 

 action of the alcohol. With the sporidia are a few globose granules. The asci at 

 length become free, in which case they are generally slightly swollen at the base, 

 and at last, in old specimens, there is scarcely any trace of them in the hymenium, 

 which consists of the paraphyses only. When the cups are quite formed and perfo- 

 rated, the cellular arrangement of the contents of the balls has wholly vanished, and 

 there are only a few faint radiating lines in place of the regular divisions. The whole 

 substance is composed of branched, more or less flexuous threads. Occasionally the 

 stem is not at all distinct, and the general form less globose, probably from the indi- 

 viduals having grown more deeply in the fissures of the bark. In the largest speci- 

 men figured there were traces of fine punctures, which had evidently arisen from the 

 whole surface having been granulated like the stem in an early stage of growth, as 

 some of the punctures below had still a little black granule set in them. There were 

 besides other dots, which appear to indicate the position of undeveloped cups. 



I have considered all the Fuegian specimens as belonging to one species. It 

 is possible, however, that the larger specimens may prove distinct, though the 

 differences, which are not apparently important, more probably arise from the 

 period of the year at which they were gathered, as noticed above in Mr. Dar- 

 win's notes. 



Spec. 2. Cyttaria Berteroi. 



Paliidior irregularis, basi subelongata, cupulis majoribus ; ore pentagono; 

 margine fisso reflexo. 



Hab. in Chili in Fagum obliquam vere et aestate. 



Paler than the last, 1^ — 3 inches in diameter, not regularly globose, as in the last, but pro- 

 duced at the base. Cups large, 3-lOths of an inch or more broad; aperture more or 

 less decidedly pentagonal, bordered by the revolute margin, which is split into portions 

 VOL. XIX. G 



