110 BRITISH DISCOMYCETES. 



Peziza argillacea — Sow., " Fung./' t. 148 ; Fries, 

 " Sys. Myco.," ii. p. 66; " Eng. Flo./ 5 v. p. 190; Cooke's 

 " Handbk," 1992. 



On modelling clay. 



Occasionally on common black modelling clay, where, 

 to the artist, it is a troublesome intruder, it being gene- 

 rally necessary to work the part again to get rid of it. 

 It is held to the clay by very fine attenuated cobweb- 

 like fibres from the sides, as it were, to assist the little 

 knotty root (Sowerby). 



The Rev. M. J. Berkeley, in whose possession Sowerby's 

 original specimens were, kindly gave me some of the 

 modelling clay on which the Peziza had grown, but the 

 Peziza had long since disappeared. On the surface of 

 the clay, when it came into my hands, were a number of 

 small, hard, seed-like bodies partly imbedded, around 

 some of which was a growth of mould giving them the 

 appearance of Sowerby's figure. I have kept the clay 

 damp under a bell-glass for some years, but no Peziza 

 has appeared. 



Genus II.— Psilopezia. Berk., " Outl.," p. 373. 



Indeterminate, immarginate, agglutinate ; hymenium 

 always exposed. (Plate V. fig. 23.) 



The typical representative of this genus has only 

 been found once. It resembles a Rhizina more than a 

 Peziza, though at first included with the latter, but it 

 has not the peculiar roots of the former. The spores 

 differ also from those in Rhizina. 



Two species . . . . . . . . . . . . 1-2 



A. HYMENIUM MOUSE-BROWN. 



1. Psilopezia Babingtonii. Berk. 



Small, convex above, mouse-brown, fixed by the 

 margin; beneath concave, pale watery brown, slightly 

 rugose, with obsolete fibrils ; asci cylindrical ; sporidia 8, 



