122 FUNGUS-FLOEA. 



STibstratHm, whitisli, pale ochraceous or buff wlien dry; 

 spores subglobose, 6-6 /*. 



Corticiwm lacteum, Fries, Hym. Eur., p. 649 ; Mass., Mon. 

 Thel., p. 132. 



On wood. Broadly effused, often in very irregular patches ; 

 whitish, ochraceous, or pale buff when dry ; margin inde- 

 terminate, fibrillose, often radiating in long, thick, mycelial 

 strands in a frondose manner for several inches ; hymenium 

 when perfect smooth, cracted. Differs from G. radiatum in 

 the cracked hymenium, and from C. radians in the subglobose 

 spores. Often imperfect and barren. 



Corticium confluens. Fr. 



Closely adnate, thin, margin radiating but not fibrillose ; 

 hymenium hyaline, whitish when dry; spores cylindric- 

 ellipsoid, 20 x 10 /j.. 



Corticium confluens, Fries, Hym. Eur., p. 665 ; Mass., Mon. 

 Thel., p-. 133. 



On bark, usually beech. Often originating as isolated 

 rounded patches, which soon become confluent; closely ad- 

 nate, thin. 



Corticium arachnoideum. Berk. 



Thin, eifused, white or pallid, margin not determinates 

 fibrillose or subfloccose below, margin fimbriated with white 

 fibrils; hymenium waxy, continuous, when dry becoming 

 cracked ; spores globose, 6-7 /x diameter. 



Corticium arachnoideum. Berk., Ann. Nat. Hist. xiii. (1844), 

 p. 346 ; Mass., Mon. Thel., p. 135. 



On wood, bark, running over moss, &c. Forming delicate, 

 effused, arachnoid patches of a snowy white ; threads by no 

 means forming fibres, but spreading like a delicate web and 

 often remaining barren ; but under favourable circumstances 

 giving rise to a smooth hymenium, consisting of elliptic 

 sporophores arranged in little bunches. Its habit is not 

 unlike that of Thelepliora hornbycina, B. (Berk.) 



The specimens on which Berkeley founded the species 

 were in the hypochnoid condition, but afterwards numerous 

 well-developed specimens were collected, showing the hy- 

 menium continuous for several inches, pale ochraceous (when 

 dry) or often with a tinge of glaucous green, slightly cracked ; 

 margin shading off into radiating mycelium, cobweb-like or 



