Mr. R. Spruce un the Musci and llcpjiticii' uf 'IW'sdalc. 275 



66. Grimmia torta, Hornsch. Not unfrequent, either on tlie lime- 

 stone or basalt, but occuri'ing chiefly on loose stones in the more 

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

 Always barren. 



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

 Castle and Middleton, and on rocks in Upi^er Teesdale. 



68. Gymnostomum ciirviroslrum, 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 High 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 lo^v. Since observing it in this station I have gathered 

 it in considerable quantity in Mowthoi-pe 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, Taj'l. MSS. (Zygodon Mougeotii, B. and S. ?) 

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



71. — rupestre, Schwaegr. Frequent on moist rocks ; often grow- 

 ing in company with G. curvirostriim. 



72. Hedu'igia astiva. Hook. On moist basaltic rocks below the 

 High Force, as well as in other 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. Hymenostomum microstomum, II. Br. (Gymnostomum micro- 

 ■stomura, Hedw.; H. and T.) Upon a wall, topped with earth, below 

 the High Force j^lantation. 



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



76. — alopecurum, L. Moist rocky situations. 



77. — catenulatum, Schwsegr. On stones in Flolwick 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 ; Dnimmond's 

 Musci Jmericani, No. 190. 



Growing intermixed with Jung. trichophyUa 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 subpinnate as in H. catenula- 

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

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

 pink. Leaves yierveless, slightly denticulate, more Avidcly areo- 

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

 upwards than those of H. catenulatum, yet not extending to so 

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



Ann. &: Mag. N. Hist. Vol xiii. * T 



