OF THE FOBTY-NINTH PAKALLEL OF LATITUDE. 35 



leaves are much wider in proportion to their length, and loosely- 

 imbricated, so that the stems have a more terete appearance ; the 

 papillae on the back of the leaves seem to be absent ; the areolation 

 agrees entirely with that of the preceding species, but the cells in 

 the angles are more bossed out and coloured. 



This may be H. {Isothechm) Brewerianum, Lesq., but its de- 

 scription is not sufficiently complete to be quite certain. 



H. aggregatum, sp. nov. Dioicum, caule primario repente, ramis 



erectis densissime aggregatis simplicibus parceve ramosis curvatis 



attenuates, foliis inferioribus patentibus late hastato-ovatis acuminatis 



subenerviis sensim versus medium ramorum in late ovata, ultra 



medium nervata acuminata subjulacea imbricata transeuntibus, inde 



sensim minoribus argutiusque versus apicem serrulatis, nervo dorso 



apice dentiformi prominente, cellulis ad angulos pluribus minutis 



quadrato-rotundatis,superioribus brevibus oblongis pellucidis,perichae- 



tialibus elongatis ovato-lanceolatis seminerviis apicibus serrulatis 



patulis, theca in pedunculo circiter seniiunciali laevi inclinata cylin- 



dracea inaequali, operculo conico acuminata, peristomio interno pro- 



cessibus angustis, cihis singuhs dimidio brevioribus interpositis, in 



membrana ad dentium tertiam longitudinis exserta. 



Hab. Vancouver Island, Lyall ; British Columbia, Douglas. 



Slightly glossy, pale green tinged with brown, growing in dense 



patches, with the erect stems closely packed together. The leaves, 



from their julaceous imbrication, give the smaller plants some 



resemblance to some states of Pterogonium gracile, but they are 



generally much thicker and shorter. Other stems with less 



imbricated leaves have a resemblance to H. myurum, with which 



the habit of the plant agrees. 



H. aplocladum, sp. nov. Dioicum, caule procumbente apice descen- 

 dente radicante ramis paucis subsimplicibus apicibus saepe attenuatis 

 decurvatis, foliis patentibus, in ramorum apicibus cuspidato-imbricatis, 

 ovatis acutis nervo sub apice evanido integerrimis, in ramulis apicibus 

 latioribus obtusioribus serrulatis, cellulis basi ad angulos pluribus 

 quadrato-rotundatis subobscuris, superioribus oblongis parietibus te- 

 neris, perichaetialibus elongatis erectis ovato-lanceolatis acuminatis 

 apice serrulatis ultra medium nervatis, theca in pedunculo elongato 

 sublsevi erecta suberectave ovali cylindracea, operculo convexo acu- 

 minata. 

 Hab. N.W. coast of America, Douglas. 



In appearance not unlike some specimens of H. acuminatum, 

 Beauv. ; but the leaves are quite smooth, and the habit would ap- 

 pear to be different. The seta is very slightly rough, so slightly 

 that its roughness is only seen when specially sought for. The 

 peristome is broken in all the capsules. 



d2 



