APPENDIX. 243 



base 9f C. datum. The hairs are more delicate, not having half 

 the diameter, and the sporidia are scarcely more than half as long 

 or broad. A species of Polyactis afterwards made its appearance 

 on the same mycelium on some portion of the twine left behind 

 with a few immature perithecia. 



Chastomium murorum, Corda. Wall Bristle-Mould; 

 gregarious, glaucous, then blackish ; perithecium globose, brown; 

 hairs circinate, erect, septate, pulverulent ; spores oblong, yel- 

 lowish. On plaster. Ilare. (M. J. B.) 



Chsetomium rufulum, B. and Br. Rufous Bristle- 

 Mould; perithecia subglobo^e, cellular, rufous, springing from 

 a thin mycelium ; asci short, obtuse ; sporidia 8, globose, 

 granulate, biseriate.— On a paper box. 



Chgetomium griseum, Cooke. Grey Bristle-Mould; 

 subgregarious or scattered, grey or cinereous ; perithecia globose, 

 brown; hairs long, elastic, circinate, pellucid, faintly and rarely 

 septate; asci clavate, fasciculate; sporidia lemon -shaped, 

 colourless ; endochrome granular or nucleate. — On old sacking, 

 rags, and paper. 



o» 



Ascotriciia, Berk. 



Perithecium thin, free, mouthless, seated on loose, branched, 

 couidiiferous threads; sporangia linear, containing daik 

 elliptic spores. — Berk. OutL, p. 405. 



Ascotricha chartarum, B. Paper Mildew; perithecium 

 thin, olive-brown, seated on radiating flocci ; sporangia linear, 

 numerous; spores broadly elliptic, chocolate-coloured.— On white 

 printed paper in a deal candle-box. King's Cliffe. (Plate XII. 

 figs. 254-256.) 



Eurotium, Link. 



Perithecia reticulated, vesicular, coloured, attached to mucedi- 

 nous threads; sporangia delicate.— Berk. OutL, p. 405. 



Eurotium herbariorum, Lk. Herbarium Mould ; pen 

 thecium spherical, sub-depressed, yellow, seated upon radiating 

 expanded, branched, intricate flocci. — On plants in herbaria, and 

 various decaying substances. Very common. (Plate XII. figs. 

 260, 261.) This is the ascigerous condition of the common blue 

 mould, Aspergillus glctucus. 





