34 MR. W. MITTEN — BRYOLOGIA OF THE SURVEY 



(Isothecium, Bryol. Europ.) 



H. stoloniferum, Hook. Musci Exot. t. 74. 



Hab. Vancouver Island, Wood; British Columbia, Lyall; N.W. 

 America, Menzies ; Nootka, Barclay. 



Leaves from the primary stem, where the perichaetia are pro- 

 duced, ovato-lanceolate, serrulate, slightly plicate, those of the 

 ramuli elliptic-lanceolate, minutely papillose on the back above 

 the middle, nerve smooth, continuing to three-fourths of the length 

 of the leaves. Perichaetial leaves subulate, serrulate, and recurved, 

 from an oblong, erect, faintly two-nerved base. Seta smooth. 

 Peristome as figured. This fine species corresponds entirely in 

 habit with the European H. tm/osuroides, Dill. 



H. spiculiferum, sp. nov. Foliis infra perichaetium e basi cordato- 

 ovata lanceolato-aeuminatis nervo ad -f evanido dorso laevibus, mar- 

 ginibus inferne reflexis superne serrulatis, superioribus angustioribus 

 dorso papulosis, ramulinis elliptico-lanceolatis acutissimis concavis 

 dorso spiculoso papillosis, nervo versus apicem denticulato, marginibus 

 planiusculis ubique serrulatis, perichaetialibus e basi erecta oblonga 

 ultra medium uninervatis subulatis serrulatis recurvis, theca in pedun- 

 culo breviusculo laevi oblonga subaequali horizontali, operculo conico, 

 peristomio interno processibus perforatis, ciliis singuhs aequilongis, in 

 membrana ad tertiam dentium longitudinis exserta, habitu H. myosu- 

 roidis. 



Hab. British Columbia, Lyall and Douglas. 



In habit similar to H. myosuroides, but the ramuli more atte- 

 nuated and more curved, and the whole plant a little larger. It 

 appears to differ from H. stoloniferum in its more slender habit, 

 more abundant papillae on its branch leaves, reflexed margin of 

 its cauline leaves, the more strongly one-nerved perichaetial leaves, 

 and single cilium between the processes of the internal peristome. 



H. acuticuspis, sp. nov. Foliis laxe imbricatis, infra perichsetium late 

 cordato-ovatis acumine angusto elongato marginibus tenuiter serru- 

 latis apice cuspidis sublaevi, nervo variante brevissimo, quasi disperso, 

 furcato integrove medio evanido, cellulis ad angulos impressis infus- 

 catis, ramulinis ovali-ellipticis acutis serrulatis ad medium nervatis 

 dorso laevibus, cellulis ad angulos fuscis, perichaetialibus e basi oblonga 

 enervia subulatis recurvis subintegerrimis, theca in pedunculo brevi- 

 usculo ovali inclinata, operculo conico, peristomio interno processibus 

 perforatis ciliis duobus brevioribus interpositis, habitu H . stoloniferi. 



Hab. British Columbia, Douglas. 



Two stems only have been seen of this apparently distinct 

 species. In size it corresponds with H. stoloniferum) but its 



