60 
NEW ARRANGEMENT OF 
yet contributes to establish the existence of a peculiar 
structure*. We ourselves, after repeated scrutiny, and 
lately, even in company with the learned authors of the 
Muscologia Britannica, have not been so fortunate. We 
could, however, perceive a series of striae filled up by a 
reticulated vasculose structure, which, under favourable cir- 
cumstances, might split in the manner described. Upon the 
whole, therefore, (not forgetting the uncommon habit of 
the plant, so unlike any Gymnostomum)^ we feel inclined, 
with MoHR, to consider it as a distinct genus. Besides, 
the calyptra is distinctly entire, which is sufficient of itself 
to remove it from Gymnostomum, 
PLATE II. 
Fig. ^2. & 23. Thecae of ScMstostega pennata^ the first 
without the operculum. 
24. Operculum of the same, shewing the striated and 
vasculose structure, as it appeared to us, 
25. Calyptra of the same. 
26. Sporules. 
27. An entire frond. 
28. Cellular structure of the leaf 
All the figures are more or less magnified. 
• This structure, as far as we may judge by Hooker's Plate, appears 
also to exist in Drepanophyllum ; unless this be owing to the remains of some 
teeth lurking in the interior, as we have perceived in Hedwigia Sckmidtii 
(Hook.) ; in that case, DrepanophyUicm must be again removed to the Z)i- 
eranoidea. 3 
