OF THE ATLANTIC ISLANDS. 5 
four series is similar to that of Z. Patrisie, Hampe, but the rela- 
tive size of the series is reversed. 
Hookeria Splitgerberi, Mont., 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 lete-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. 
( Rhaphidorrhynchum, Schimp.) 
S. AURICOMUM, sp.nov. Monoicum, caule prostrato fusco ramis brevibus 
pinnato, folis patentibus anguste ellipticis longe subulato-attenuatis 
concavis enerviis integerrimis, cellulis elongatis angustis, alaribus utrin- 
que tribus fuscis, perichzetialibus patentibus e basi subovata sensim an- 
gustatis integerrimis breviter nervatis, theca in peduneulo gracili rubro 
elongato apice cygni colli flexo ovali-cylindracea subinzquali state " 
curvata, peristomio dentibus crassis intus valde trabeculatis, processibus 
carinatis solidis, ciliis binis subzequilongis lzevibus. 
Hab. Madeira, on decayed wood, Johnson. 
A small species, closely investing the wood, of a yellow and 
rather glossy appearance, related to S. (Hypnum) leptocarpum, 
Sehw., 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 distinet in form and 
colour from the rest of the substance of the leaf. Their affinity 
is remote from Rhynchostegium, Schimp., of which his Rhaphido- 
stegium was made a section, to include Hypnum demissum, Wils. 
STEREODON, Brid. 
S. CANARIENSIS, sp. nov. Dioicus, exspitosus, caule procumbente 
pinnatim ramoso, foliis faleatis secundis compressis ovato-lanceolatis 
ovali-lanceolatisque sénsim acutis, marginibus superne argute serrula- 
tis, nervis binis brevibus, cellulis elongatis longitudine circiter 7355- 
3005, latitudine zop uncis: metientibus, ad angulos paucis obscuriori- 
bus, perichetialibus erectis elliptico-lanceolatis apicibus serrulatis, 
theca in pedunculo elongato gracili brevi ovali inzequali horizontali, 
