Mr. R. Spruce on the Musci and Ileputicae of Teesdale. 275 



QG. Grimmia torta, Hornsch. Not unfrequent, either on the lime- 

 stone or basalt, but occurring chiefly on loose stones in the more 

 elevated situations, as at the base of White Force and Falcon Glints. 

 Always barren. 



67. — trichophylla, Grev. Abundant on walls between Barnard 

 Castle and Middleton, and on rocks in Upper Teesdale. 



68. Gyranostomum curvirostrum, Hedw. On rocks near streams ; 

 chiefly on the limestone, but not confined to it. 



69. — Donianum, Smith. On limestone rocks (below the basalt) 

 on the Yorkshire side of the Hii^h Force, where it was discovered by 

 Mr. R. B. Bowman. This minute moss grows in very small quan- 

 tity, and its locality is exceedingly difficult of access, except when 

 the river is low. Since observing it in this station I have gathered 

 it in considerable quantity in Mowthorpe Dale near Castle Howard, 

 where it grows in the crevices and on the under side of calcareous 

 rocks, in company with Hypnum tenellum and crassinervium. 



70. — nimbosum, Tayl. MSS. (Zygodon Mougeotii, B. and S. ?) 

 Rocks at the High Force, White Force and Cronkley Scarr. 



71. — rupestre, Schwsegr. Frequent an moist rocks; often grow- 

 ing in company with G. curvirostrum. 



72. Hedwigia astiva. Hook. On moist basaltic rocks below the 

 High Force, as well as in othei' similar situations. When the im- 

 mense tufts which this moss usually forms are separated vertically, 

 they often appear beautifully zoned, which I suppose is caused by 

 the annual elongation of the stems. 



73. Hookeria lucens, Sm. On the west side of Mickle Fell. 



74. Hymenostonmm microstomum, R. Br. (Gymnostomum micro- 

 stomum, Hedw.', H. and T.) Upon a wall, topped with earth, below 

 the High Force plantation. 



75. Hypnum aduncum, L. Bogs. In fruit on Cronkley Fell. 



76. — alopecurum, L. Moist rocky situations. 



.77. — catenulatum, Schwsegr. On stones in Holwick Wood. 



78. — commutatum, Hedw. Abundant and in a fertile state on 

 wet rocks. 



79. — confervoides, Bridel } " Repens, ramis teretibus capillaceis, 

 foliis erectis lato-lanceolatis enervibus, integerrimis ; capsula 

 suberecta, operculo obtuso." — Schw.Suppl. t. 142 ; Drummond's 

 Musci Americaai, No. 190. 



Growing intermixed with Jung, trichophylla on basaltic rocks in 

 a shaded situation by the Tees' side below Winch Bridge. I ob- 

 served only a single patch, destitute of capsules, but possessing peri- 

 chcetia. 



Stems sparingly branched, not subpinimte as in H. catenula- 

 turn (its nearest congener). Branches nearly erect, of a beauti- 

 ful pale green above, in their lower part with a slight tinge of 

 pink. Leaves nerveless, slightly denticulate, more widely areo- 

 lated (though far smaller in size), narrower, and tapering more 

 upwards than those of H. catenulaturriy yet not extending to so 

 long a point as in H. serpens ; they are equally patent, too, in 



Ann. &: Ma^. N.. Hist. Vol. xiii. ' T 



