LICEA.] LICEACE& 151 



3. L. pusilla Schrad., Nov. Gen. PI., p. 19 (1797). Plasmodium? 

 Sporangia hemispherical or pulvinate, scattered, 0'6 to 1 mm. diam., 

 dark brown, glossy, dehiscing in lobes ; sporangium-wall cartila- 

 ginous, oHve-brown, the margin of the lobes dotted with minute 

 granules, 1 to 2 /* diam. Spores oUve-brown, smooth, 16 to 20 

 /J, diam. — Protoderma pusilla Host., Mon., p. 90. Protodermium 

 pusHlum Berl., in Sacc, Syll., vii., p. 328 j Mass., Mon., p. 43. 



Plate LVII., B. — a. sporangia, x 20 ; J. fragment of sporangium- wall, and 

 spores, X 280 ; c. spore, x 600 (Scotland). 



This species was separated by Rostafinski from Licea, and placed in 

 the division Amaurosporece as the- type of a new genus Protoderma, 

 on account of the colour of the spores. The examination of several 

 specimens in Strassb. Herb, and British Museum shows that the colour 

 of the spores is essentially olive-brown ; Schrader's original place for 

 the species is therefore retained. 



Sah. On dead wood. — Glamis, Scotland (B. M. 100) ; Kiel, Germany 

 (Strassb. Herb.). 



SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 



4. L. variabilis Schrad., Nov. Gen. PL, p. 18, pi. 6, figs. 5, 6. 

 Sporangia scattered, depressed, reddish-brown, hemispherical, 

 ovate, oblong or flexuose, of varying shape and size ; sporangium- 

 wall thin, dehiscing above, composed of a double membrane, the 

 outer rough, the inner smooth, shining ; spores dull yellow. 



Hab. On pine- wood, rarely on beech. 



The description and figures suggest that this species was a form of 

 Perichxna popuUna Fr., with scanty or no capiUitium. 



5. L. brunnea Preuss, Linnea, xxvi., p. 709 (1853). Sporangia 

 gregarious, globose, subdepressed, ochraceous-brown ; the wall 

 parchment-Uke, breaking irregularly, evanescent above ; spores 

 minute, ochraceous, conglobate ; capUlitium none. 



. Hah. On pine-wood. — Hoyerswerda, Silesia. 

 This brief description probably refers to Crihraria arg'dlacea Pers. 



6. L. incaruata Preuss, I.e. (1853). Sporangia minute, flesh- 

 coloured, smooth, round, somewhat depressed; spores flesn-coloured, 

 globose. 



Hah. On dried tincture of rhubarb. — Hoyerswerda, Silesia. 

 This description is too imperfect to be of value. 



7. L. antarctica Speg.,inBoletinAcad.Nac.Cienc.Cord. Arg., xi., 

 p. 5. Sporangia in groups of from 5 to 20, rarely solitary, sessile, 

 obovate, 0-5 to 0'7 mm. diam., smoke-brown, glabrous, smooth ; 

 wall simple, brown, rugulose ; capillitium very scanty of slender, 

 scarcely branching, papillose tubes, 1 jx, thick, dull yellow-brown ; 

 spores globose, closely and minutely warted, rosy-fulvous. 



Hab. On dead trunks of Fagus antarctica. 



The description suggests a form of Perichwna popuUna Pr. 



