Mr. Hooxer’s Observations on Andrea. 385 
it thelast; by which means its affinity to Jungermannia, with which 
the next order Hepatice begins, will be pointed out. Yet it is 
to be regretted that, by so doing, according to the present ar- 
rangement of Musci, it must be so widely separated from the 
genus Sphagnum, to which in many particulars it bears a most 
striking resemblance, and in none more so than in the white suc- 
culent pedicellus * and irregularly torn calyptra, a part of which 
frequently remains at the base of the capsule. If it were neces- 
sary in an artificial arrangement to regard more particularly na- 
tural affinity, perhaps at some future time it would be found 
desirable to alter the present disposition of the genera of Mosses, 
and begin with those whose peristomium is of a more compli- 
- cated structure, —for example, with Burbaumia, which, according 
to Dr. Mohr, has a treble row of teeth,—and thus descend. suc- 
cessively through Hypnum, and those with a double and single 
peristomium, to Gymnostomum, Phascum, Sphagnum and Andrea. 
- The most striking similarity between the latter genus and Jun- 
germannia is in the fleshy or rather succulent peduncle, the deep 
brown colour of the capsule, and the circumstance of its open- 
ing into four valves; to these may be added the absence of an 
internal membrane to the capsule, and the irregularly torn ca- 
lyptra, which is not cut round transversely (circumscissa) as in 
most of the Mosses. But if we examine more attentively ‘the 
structure of the capsule of Andrea, a nearer approach to the true 
Musci may be readily discovered, and we shall not fail to meet 
with all the important characters of that order. Bridel in his 
- Muscologia, i. p. 3, defines a moss to be “ Planta fructu cal yptrato 
* I have called this:a pedicellus in compliance with the generality of Muscologists ; 
but it is in reality an elongation of the receptacle in Andrea as well as in Sphagnum ; so 
that these two genera differ from all other Mosses in having the capsule really sessile. 
et 
