42 THE VOYAGE OF H.M.S. CHALLENGER. 



CRYPTOGAM^.— CELLULARES. 



MUSCI. 1 



Dicranella (Campylopodium) ascensionica, Mitt. 



Dicranelln {Campylopodium) ascensionica, Mitt, in Melliss's St Helena, p. 357. 



Ascension. — Endemic. Seemann ; Moseley. 



This species, which seems to replace the Dicranella proscripta of St Helena, is a little 

 less robust and quite distinct in its leaves. 



Campylopus introflexus, Mitt. 



Dicranum introflexus, Hedw., Sp. Muse, p. 147, t. 29 ; C. Mull., Synop. Muse. Frond., i. p. 405. 



Ascension. Moseley. 

 A widely dispersed moss. 



Campylopus helenicus, Mitt. 



Dicranum helenicus, C. Mull., Synop. Muse. Frond., ii. 599. 



Ascension. Moseley. 



Barren specimen with Mastigopliora leioclada ; determination uncertain, but the leaves 

 correspond very nearly to the St Helena specimens. 



Calymperes (Hyophilina) pulvinatum, Mitt. 



Calymperes [Hyophilina) pulvinatum, Mitten, n. sp. 



Caespitosum, caulibus simplicibus foliis ambitu elongati lanceolatis fere ad medium 

 erecti3, ot e cellulis hyalinis areolatis, inde patentibus apicibus acutiusculis vel nervo 

 coucolori dorso scabro in receptaculo gemmifero producto terminatis, margine crenulatis, 

 limbo pallidiore infra apicem evanescente, cellulis minutis obscuris dorso minute papillosis 

 areolatis. 



Ascension. — Growing in a tufted manner on decayed wood; barren — Moseley. 



The stems of this moss vary in the specimens from 1 cm. to 3 cm. in length, but as 

 the foliagi is nol densely inserted they appear rather slender from the foliage shrinking very 

 much when dry. In the size of the moss and in its leaves it comes near to Calymperes 

 moluccense, but the erect lower part of the leaf is longer, although the vanishing limb is 

 similar. From the African Calymperes afzelii it differs greatly in the outline of the leaf 

 as well as in the papillation of its cells and scabrous nerve. 



1 By W. Mitten, A.L.S., with a few additional names from other sources. 



