Dr. Nylander on new British Lichens. 59 
colourless, or only becoming yellowish. Such a singular differ- 
ence arising from desiccation Dr. Nylander has never observed 
before or elsewhere, nor can he assign any reason why, in a 
dried and aged state, the chemical nature of the thalamium 
should become changed. 
In many species of the genus Peziza the gelatina hymenea 
becomes blue with iodine. In P. cochleata, Huds., and P. vio- 
lacea, Pers., it does so, and the thecze more intensely so at their 
extreme apices. In other species the thece alone, especially at 
the apices, are turned blue, as in P. firma, Pers., P. plumbea, Fr., 
P. juncigena, Nyl., P. undella, Fr., P. cerea, Sow., P. repanda, 
Wahlenb., and in many others,—thus manifesting that the na- 
ture of Fungi differs from that of Lichens. [Summaried from 
the ‘ Flora’ of Oct. 10, 1865.] 
In a letter recently received from Dr. Nylander, he has kindly 
furnished the proper formula for the solution, viz. :— 
Iodine, gr. j. 
Iodide of potash, gr. ii). 
Dissolve these in 6 oz. of distilled water, and filter for use. 
The solution should be kept from the light in a black glass 
bottle, or in one covered with paper. In using it, it is sufficient 
to apply a drop to the edge of the thin glass covering the dis- 
section, under which it will diffuse itself in the water containing 
the object. 
VIl.—Notule Lichenologice. No. Il. 
By the Rev. W. A. Lricuron, B.A., F.L.S. 
Duorine the past year Dr. Wm. Nylander has named and cha- 
racterized the following new British Lichens, in the ‘ Flora’ of 
January 18th, March 29th, May 6th, and July 29th, 1865. 
1. Collema furfureum, Ny]. 
Thallus fusco-niger (vel niger), statu humido rubricose nigricans 
(sub microscopio lamina tenui extus rubricose rufescente) ; 
apothecia fere urceolariformia; spore simplices, ellipsoide. 
Gelatina hymenea iodo vinose rubens. 
Discovered by Admiral Jones, on rocks of Ben Lawers, Scot- 
land. 
Allied to Collema granuliforme, Ny]. 
2. Leptogium rhyparodes, Nyl. 
Thallus fuscus vel seepe fusco-nigrescens, furfwrosus, tenuis, aut 
subgranulosus, diffusus ; apothecia concoloria vel rarius (magis 
