Fig. 2. 



I BELIEVE this to be a variety of the above, and of 

 tab. 299. It has been called Rhizomorpha fpinofa. The 

 three already mentioned, and one given me by the Rev. 

 W. Kirby, found under the bark of an old water-pipe 

 on the Middlefex fide of Weftminfter-bridge, feem to 

 be the fame fpecies. 



Fig. 3. R. hybrida. 



OLD or rotten wood, roots, &;c. are occafionally co- 

 vered with a black fubftance, which fometimes pro- 

 duces a fort of fructification, determining it to be a 

 perfe6l Fungus, or Sphivria. This approaches but little 

 towards a perfect Fungus, yet I was not willing to 

 leave it unnoticed in a work where it might be 

 expe6led. It is of a confiftence like the bark of the 

 Rhizomorpha., and of a brownifli colour, fpreading over, 

 and often in, the cracks of decaying wood. This was 

 covered externally with a powdery light-brown fub- 

 ftance. 



TAB. CCCXCIII. 

 Fig. I. SPH^RIA nigra. 



OMALL, flattifli, indented at the top, black on the 



furface, found on the ftalk of a decaying umbelliferous 



plant. 



Fig. 2. S. TUBERosA. 



SOMEWHAT verrucofe, black on the outfide, and 

 white within. Its fubftance is folid, penetrating, or 

 often protruding, through the thick bark of the plant 

 it grows on. 



Fig. 3. S. Brassica. Bickf. fafc. i. p. 23. 



NOT uncommon on cabbage-leaves that are left to 

 rot in the autumn. It is often the fize of a pea, form- 

 ing a kind of tubercle, with a blackifh cruft on the 

 outfide, and white within. Thefe two lalf have been 

 received into the genus Verrucaria by Mr. Perfoon ; 

 but it is doubtful whether we may not be deceived by 

 them, as by Spharia tuber culoja of this work, tab. 374. 

 Jig. 8. See defcription. 



