H4 ANNALS OF SCOTTISH NATURAL HISTORY 



below. Tufts lax and indefinite, stems simple or slightly 

 branched, rather more than half an inch long ; leaves laxly 

 disposed below, nearly straight, rather broad near the base, 

 lanceolate, shortly acuminate, lengthening upwards and 

 forming at the summit a somewhat uncinate cluster, slightly 

 clasping below ; margin plane but leaf incurved in the 

 middle, less so upwards ; margin and back of nerve, in 

 upper third or more, sharply serrated as in D. fuscescens, 

 the pellucid teeth on the back from 5 to 7 /A in height, in 

 older leaves these serratures are at times apt to collapse as 

 in the deciduous leaves of Dicranodontium longirostre or 

 even in Dicrannin fuscescens itself; auricles not well defined 

 small, of brownish quadrate cells ; central basal areolation 

 long and narrow, 50 to 75 by 6 to 9 /z, outwards broader, 

 marginal much shorter, upwards ultimately small, quadrate, 

 rhomboid or even triangular, 7 to I I p, long, much as in 

 Dicrannm fuscescens. The upper cells of D. Starkii are on 

 the contrary oblong, 18 to 26 by 6 to 8 /LA. Nerve narrow, 

 broadening a little upwards, excurrent ; seta reddish, long 

 and strong, capsule oblong, curved, scarcely strumose, rather 

 annular at the base, smooth, slightly striated when old, lid 

 reddish, conico-rostrate scarcely half the length of capsule, 

 peristome red, teeth longly acuminate, split to middle or 

 more, barred and minutely papillose ; basilar membrane 

 narrow; spores reddish -brown, spherical, smooth, 12 to 

 1 6 jjb diameter. 



DlCRANUM INTERLUDENS, n. sp. Loosely tufted, stems 

 generally simple, at times bifurcate, red ; lower leaves spread- 

 ing shorter, elongating upwards, uppermost aggregated into 

 a secund almost cuspidate bundle, lanceolate acuminate, 

 margin plane but the leaf inflexed about the middle or 

 almost tubular, entire except near the apex where it is 

 serrated and shows a few scattered teeth on the back in 

 the same region ; nerve slender much as in D. palustre, 

 near base from 60 to 80 ^ broad, tapering upwards and 

 ending (apparently) at the acute apex, thin 30 to 35 p thick, 

 slightly convex on the back, smooth and nearly plane in 

 front, composed of a middle row of oval cells, 5 to 9 /x 

 across, and a posterior row of minute cells with numerous 

 sterei'ds on both sides of middle row ; near apex nerve on 



