OF THE ATLANTIC ISLANDS. 



four series is similar to that of L. Patrisice, Hampe, but the rela- 

 tive size of the series is reversed. 



Hookeria Splitgerberi, Mout., is, from the description, evidently 

 another member of this small group, which differs from Lepido- 

 pilum in wanting the dorsal, medial, and ventral series of leaves. 



Hookeria Icete-virens, Hook, et Tayl., is found in Madeira, and 

 in its pale appearance and size has some resemblance to L. fonta- 

 num, but the areolation of its leaves, as well as their insertion, is 

 different. 



Sematophyllum, gen. nov. 



Pleurocarpicum. Habitus, fructus peristomiumque Hypni. 

 Folia cellulis alaribus utplurimum utrinque tribus distinctis 

 signata. 



( RliapliidorrTiyncJium, Schimp.) 



S. auricomum, sp.nov. Monoicum, caule prostrato fusco ramis brevibus 

 pinnato, foliis patentibus anguste ellipticis longe siibulato-attenuatis 

 concavis enerviis integerrimis, cellulis elongatis augustis, alaribus utrin- 

 que tribus fuscis, perichaetialibus patentibus e basi subovata sensim an- 

 gustatis integerrimis breviter nervatis, theca in pedunculo gracili rubro 

 elongato apice cygni colli flexo ovali-cylindracea subinaequali aetate 

 curvata, peristomio dentibus crassis intus valde trabeculars, processibus 

 carinatis solidis, ciliis binis subaequilongis laevibus. 



Hab. Madeira, on decayed wood, Johnson. 



A small species, closely investing the wood, of a yellow and 

 rather glossy appearance, related to S. (Hypntm) leptocaipum, 

 Schw., but much less ; allied also to S. demissum, "Wils. ; not, how- 

 ever, very nearly resembling it or any other European moss. 



The numerous tropical species belonging to this group are 

 readily distinguished from the Hypna and Stereodontes by the 

 presence of the enlarged alar cells, which are distinct in form and 

 colour from the rest of the substance of the leaf. Their affinity 

 is remote from Rhynchostegitm, Schimp., of which his Bhaphido- 

 stegium was made a section, to include Hypnvmx demissum, Wils. 



Stebeodon, JBrid. 



S. Canariensis, sp. nov. Dioicus, caespitosus, caule procumbente 

 pinnatim ramoso, foliis falcatis secundis compressis ovato-lanceolatis 

 ovali-lanceolatisque sensim acutis, marginibus superne argute serrula- 

 tis, nervis binis brevibus, cellulis elongatis longitudine circiter y^- 

 soVo , latitudine yoVo uncise metientibus, ad angulos paucis obscuriori- 

 bus, perichaetialibus erectis elliptico-lanceolatis apicibus serrulatis, 

 theca in pedunculo elongato gracili brevi ovali inaequali horizontal^ 



