48 GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA. 



(176.) D. Obtusifolius, Schimp. ; Lesq. & James, Mosses of 1ST. 

 America, 114. 



Didymodon oblongifolium, (n. sp.) Drumm. Muse. Bor.-Am., No. 114. 

 D. latifolium, Drumm. Muse. Bor.-Am., No. 115. 



Mountain-rocks ; often on the under side of projecting ledges and 

 moist marshy places, Eocky Mountains. (Drummond.) 



(177.) D. subtorquescens, C. M. & Kindb. (n. sp.) 

 D. latifolius, Canadian Musci, No. 69, in part. 



Nearly allied to D. atrovirens, Smith, (D. nervosus, Bruch & Schimp. 

 and Lesq. & James), but the tufts are compact, the stem higher, (about 



1 cm.), the leaves green, not dingy, very short, suboval or subspathu- 

 late, smaller, less opaque, the costa neither excurrent nor broader 

 above, the capsule cylindric. 



The description of D. nervosus by Lesq. & James corresponds nearly 

 to our species, but not to the true European. 



On earth on exposed cliffs along the Grasps' coast above the Madeline 

 Eiver, 10th August, 1882. (Macoun.) 



(178.) D. cernuus, Bruch & Schimp. ; Lesq. & James, Mosses of 

 N. America, 114 ; Canadian Musci, No. 71. 



On earth, South West Point, Anticosti ; on earth at Campbellton, 

 N.B. ; on rocks and cliffs along the Graspe coast ; on earth along the 

 Pembina JRiver, northwest of Edmonton, N.W.T. ; Cache Creek Moun- 

 tain, and on wet rocks in a ravine at Kamloops, B.C. (Macoun.) 

 Greenland. (Fl. G-r.) 



Yar. xanthopus, Kindb. (n. var.) 



Leaves less chlorophyllose, costa virescent. Capsule larger ; teeth 

 more united ; pedicel yellow. 



On black earth at the crossing of Boggy Creek on the " Old Trail " 

 leading to Touchwood Hills, Manitoba, 12th August, 1872. (Macoun.) 



(179.) D. camptothecius, Kindb. (n. sp.) 



Habit of Desmatodon cernuus. Plants densely csespitose. Leaves 

 long, narrow-Ungulate, subobtuse, entire or obscurely crenulate, faintly 

 papillose, marginate and at the base revolute, mucronate by the excur- 

 rent greenish costa. Capsule cylindric, arcuate : teeth short, cut in 



2 or 4 partly coherent segments ; annulus indistinct ; lid with a short 



