208 



GENUS 252. PSILONIA * Fr. 



Flocci pc Tsistcnt, joined into an erumpent mass, at first covering 

 the simple spores. 



1.— Psilonia gilva Fr. On dead herbaceous stems. Common. 

 2-— P discoidea B. and Fr. Ann. Nat. Hist., No. 1150. 



August 1866, cum icone. Batheaston and Langley. on 



stumps and old rails. 



ORDER 22. TRICHODERMACEI. + 



Flocci covering the spores, and forming a kind of peridium, 

 which at length vanishes in the centre. 



GENCS 253. PILACRE.J Fr. 

 Stem solid, cylindrical; head globose, composed of flexuous, 

 branched, radiating threads ; spores produced near the tips, 

 forming a dusty mass. 

 1. — Pilacre faginea B and Br. Spye Park, Wilts, on beecii sticks. 



Ann. Nat. Hist., Ser. II. v. 365, No. 380 icon. 

 3. — P Petersii Berk and Curlis fungi carolii. exsicci. Ann. 



Nat. Hist., Not. 824, Ser. III. iii. 362. Leigh "Woods, C. 



Bucknall, Esq. This species retains its powerful odour in 



the herbarium for many years, 



GEN as 254. INSTITALE.§ Fr. 



Stemless ; common mass containing many cavities filled with 

 spores. 



This Genus has not occurred in our district. 



GENUS 255. ARTHRODERMA.II Currey. 

 Peridium spurious, indeterminate, roundish, composed of 



* From psilos, a spot 



t From thris, a hair, and derma, the skin. 



X From pila, a round mass (?) 



§ From instita, a fringe on a garment (?) 



11 From artbron, a joint, and derma, a skin. 



