ADDENDA. 



na. 



The following were unfortunately omitted from Vol. I.: — 



Acetabularia, a subgenus of Agaricus, belongs to the third Acetabuia- 

 series Dermim, and takes its place 

 before Subgenus XIX., Pholiota. 



Acetabularia {acetabulum, a vine- 

 gar cup. From the cup-like volva). 

 Berk. Linn. Journ. xviii. p. 389. 



Universal veil distinct from the 

 pileus ; hymenophore distinct; gills 

 free ; spores pallid tawny or brown. 



Analogous to Volvaria and Chi- 

 tonia. 



1. A. acetabulosus Sow. — Pileus 

 about 2.5 cent. (1 in.) broad, light- 

 brown, convex, striate especially at 

 the margin. Stem 5 cent. (2 in.) 

 long, white, equal, hollow; volva 

 nearly white. Gills free, narrow, 

 hispid, light-brown. 



Bank of Thames near high-water mark at Millbank, 1795. 

 May. 



This is very like a poor specimen of A. congregatus, but the pileus is more 

 plaited. The lamellae are remarkably glandular on their sides ; and instead 

 of a bare base or foot, it stands in a little socket-like volva. Sow. The 

 accompanying illustration is from the original specimen in the British 

 Museum. Sowerby gives also an enlarged section of the gills, and a side of 

 a gill showing very large cystidia. The pileus appears to be slightly split as 

 in A. rimosus. Name — from the cup-like volva. Sozv. t. 303. Berk. Linn. 

 Journ. xviii. p. 389. C. Illust. PL 345. 



VOL. II. X 



CI/. Acetabularia. One-half 

 natural size. 



