IMPERFECT CAPSULAR FUNGI— SPHAEROPSIDEAE 267 



has the stroma small and depressed, with the sporules con- 

 nected in bundles of four; Dilophospora has a crustaceous 

 stroma, with the sporules crested with cilia at each end; 

 whilst Cyto&porina accords with Cytospora in general features, 

 but the sporules are thread-like and curved, or flexuous. 

 Possibly few of the species are autonomous. There remain 

 but two aberrant genera to be alluded to, and these are Micula 

 and Micropera. The species occur on bark and often resemble 

 lenticels, or are clustered like species of Cenangium, of which 

 they are said to be the pycnidia ; the sporules are elongated 

 and nucleate. 



The second family, Nectrioideae, bears the same relation to 

 the Sphaerioideae as the Hypocreaceae to Sphaeriaceae in the 

 Pyrenomyceteae. The perithecia and the stroma, when present, 

 are 'fleshy or waxy, and pale or bright coloured. The arrange- 

 ment here is the same as in the preceding family, primarily 

 based on the sporules, so that the sections correspond. The first 

 section is the Hyalosporae, in which the sporules are continuous 

 and hyaline. Most of the genera are simple, and only one is 

 composite. Of the four in which the perithecia are not beaked, 

 only one needs particular reference, as the residue contain only 

 a single species. Zythia resembles a scattered Nectria in 

 appearance, with ovoid or oblong sporules. Sphaeronemella is 

 analogous to Sphaeronema, and has the perithecia rostrate. 

 The only composite genus is Aschersonia, of which the species 

 might be mistaken at first for species of Hypocrea, the 

 structure and habit being that of Hypocrea without asci. 

 In the only species of the genus Dichlaena the perithecia 

 have a double tunic, and the sporules are minute and globose. 

 In Didymosporae the only genus is Pseudodiplodia, which 

 corresponds to Diplodia in the brown uniseptate sporules, but 

 differs in the colour and texture of the perithecia. In 

 Phragmosporae all are hyaline. Stagonopsis corresponds to 

 Stagonospora, with like sporules ; but in Chiastospora the 

 sporules are arranged in four rays. Only one species is known 

 in each genus. The Scolecosporae has but one genus, with fili- 

 form sporules. This is Polystigmina, a stylosporous form of 

 the ascigerous genus Polystigma, in which the perithecia are 

 immersed in a discoid stroma. A small group, consisting of 



