264 The Scott is J 1 Naturalist. 



V. piloboloides). They are generally rooted in black mud, which 

 is full of worms and other animals, from which it is exceedingly 

 difficult to free them. I find the most convenient plan to mount 

 them for the herbarium is to cut a square piece out of the turf 

 with a sharp knife, and to hold it with the lower side upwards 

 under a tap till washed fairly clean ; it is then laid on paper, 

 pressed lightly under bibulous paper, and then allowed to dry. 

 For purposes of microscopical examination one or two fruit-bearing 

 branches may be teased out on mica. In the turfy species the 

 fructification is generally at the base of the green portion, or even 

 hidden in the mud. In V. dichotoma it is on the upper portion of 

 the threads. But in order to make out the structure well the best 

 plan is to immerse a small piece as soon as cleaned in a saturated 

 solution of picric acid in water. This acid is easily obtained from 

 any dealer in chemicals. 



I shall be glad to receive any fruiting specimens of this genus 

 found in Great Britain for identification. Such specimens should 

 be sent in a tube, and preserved in a solution of picric acid as 

 above described.* 



MYCOLOGIA SCOTICIA (Supplement). 



By Rev. J. STEVENSON and Prof. J. W. H. TRAIL. 



{Continued from S.N., 1886, p. 237.) 



{All measurements, except where specified, are in thousandths of a millimetre.) 



3066. Chondrioderma (Leangium) Trevelyani (Grev.) 

 Scot Crypt. Flora, t. 132, Cke. Hbk. 11 n (sub nom. 

 Diderma Trevelyani Fr.), Cooke, Myxomycetes oj 

 Great Britain, p. 40, Rostafinski's Monogr., 182. 



On Mntum undulatum ( = Bryum tigulatum Schreb.), 

 Autumn. 



East. — Forth. — — — 



West. — — — — 



* Bottles in wooden cases, suitable for sending by post, can be obtained at 

 a cheap rate at Messrs. H. Roths & Co., Mitre Court, Fenchurch St., London, 

 E,C. 



