850 Transactions of the Society. 



A. Spores smooth. 

 Prototriohia flagellifer, Kost., fig. 23. 



Sporangia scattered, globose, sessile, attached by a very narrow 

 base, wall thin, smooth, copper colour and reflecting metallic tints ; 

 mass of capillitiura aud spores flesh-colour ; elaters hroad at the hase, 

 7-9 fi, and taijering to the apex, branching at some distance from 

 the hase into two or three arms, each of which is sometimes divided 

 near the apex, spirals thin, not prominent, sometimes crowded, at 

 others distant, disappearing below the ultimate branchlets, brown, 

 becoming colourless towards the tips ; spores globose, smooth, 10-13 /x 

 diameter. 



Eost., Mon., Supp. p. 38 (in part); Cooke, Myx. Brit., p. 65; 

 Sacc, SylL, n. 1492 (in part). 



Trichia flagellifer, B. and Br., Ann. Nat. Hist., ser. 3, xviii. 

 p. 56, No. 1143, pi. 2, f. 4. 



Dermatricha flagellifer, Cooke, MS. (Type in Herb. Berk., 

 n. 10,905.) 



On spruce fir. Britain (Badminton, Glo'ster !) ; Sweden ! Scattered, 

 or rarely 2-3 in a cluster, but not crowded together, " 5 mm. or a little 

 more in diameter. Very distinct from Prototrichia metallica with 

 which it has been confused by Eostafinski, probably from want of 

 microscopic examination. In the present species the elaters are widest 

 at the fixed base and taper gradually to the free tips, and are divided 

 into two or three main branches, whereas in T. metallica the main 

 branch of the elater is undivided and very thin at the fixed base, and 

 terminates at the apex in several long, smooth spines. The spiral 

 markings are also very different in the two species. 



Prototrichia metallica, Mass., fig. 26. 



Sporangia scattered, stipitate or sessile on a broad base, spherical 

 or depressed and lenticular, smooth, shining, copper colour with 

 metallic tints ; stem very short, rather thick, darker in colour than the 

 sporangium ; mass of capillitium and spores pale flesh-colour or 

 yellowish ; elaters elongato-fusiform, 6-7 ju. at thickest part, 300- 

 400 fji long, terminating at the apex in a pencil of simple or branched, 

 cylindrical, smooth, sometimes nodulose filaments, 2 /a thick, and 

 40-60 /x long ; spirals broad, flat, close ; spores globose, smooth, 

 9-11 ju, diameter. 



Trichia metallica, B. and Br., Fl. Tasm., p. 268. 



Prototrichia flagellifera, Eost., Mon., Appendix, p. 38 (in part) ; 

 Sacc, SylL, n. 1492 (in part). 



Prototrichia elegantula, Eost., Mon., Appendix, p. 39, fig. 246 ; 

 Sacc, SylL, n. 1491. 



(Type in Herb. Berk., Kew, n. 10,905a). 



On wood. Tasmania ! Sweden ! 



Sporangia • 5 to nearly 1 mm, diameter. 



