90 PETCH : 



When fresh this species is pale yellow or straw-coloured 

 with yellow, translucent ostiola, and usually a broad, white, 

 byssoid hypothallus. It is circular, orbicular, or irregularly 

 lobed, up to 3 mm. diameter (exclusive of the hypothallus), 

 thin, 0*2-0 "3 mm. thick, pruinose becoming glabrous, with 

 slightly elevated ostiola. The perithecia are subglobose or 

 laterally oval, up to 0*2 mm. diameter and 0"15 mm. high, 

 situated in a brownish-yellow layer, which occupies two-thirds 

 the thickness of the stroma. The tissue beneath the peri- 

 thecial layer is pale yellowish. The perithecial wall is pale 

 yellow-brown, or almost hyaline. The asci are 52-58 x 3 ^x. 

 The part spores are globose, 3 [t. diameter, or oval, 4-5 X 3 (x, 

 spinulose ; in the type th^y are not fully mature, and apparently 

 all are hyaline ; in a recent collection some of the asci contain 

 a few mature spores, which are blackish yellow-green. 



Hypocrea corticioides B. & Br. 



This was described by Berkeley and Broome in Fungi of 

 Ceylon, No. 986, from Thwaites 645, as " Effusa, olivacea, 

 margine brevi byssoidea ; peritheciis nimc immersis, nunc 

 liberis collapsis ; sporidiis ellipticis obtusis apiculatis 

 uniseptatis. Sporidia 5-6 '25 {x long." 



In the type specimen the stromata are effused and flat, 

 circular, up to 5 mm. diameter. Some of them are elevated 

 in the centre, but that is because they are growing over 

 swellings in the bark of the host. The surface is tomentose 

 and the context rather loose. The colour is now somewhat 

 olivaceous, but it would appear probable that the fungus is 

 white when fresh. The perithecia are immersed, and the 

 stroma is studded with red-brown ostiola, which do not project ; 

 but part of the loose stroma may weather away, and the 

 perithecia become svxperficial. The perithecia are about 

 0*2 mm. diameter. The asci are cylindric, eight-spored, 

 50 X 4 [J,. The spores are oblong-oval, obtuse, one-septate, 

 slightly constricted at the septum, hyaline, becoming pale 

 greenish olivaceous, 5-6 x 3-3 • 5 [x. It is possible that they 

 may separate into part-spores later. 



