64 
NEW ARRANGEMENT OF 
descriptione sistit." Notwithstanding all these discrepan- 
cies, as far as our own observations extend, the calyptra 
may be pronounced truly mitriform ; and in most, nay, in 
all, the species hitherto known to us, more or less cleft into 
several basilar fissures. This circumstance shews how 
closely this genus is allied to Gymnostomum^ for in G. 
pyriforme^ and some others, the calyptra is almost mitri- 
form. 
All the calyptras we have observed are glabrous; but 
Richard*, in Michaux's Fl. Bot. Am., describes that 
of A.Jiliforme as subvillose; a fact doubted by Weber 
and MoHR, who suggest, an lusus naturse and also by 
Bridel, " quod accuratius inquirendum." Unfortunately 
in those specimens received from M. Achille Richard, 
we have not been able to discover a single calyptra ; but in 
others, from Boston, sent us lately by Mr Greene, we 
have at length detected it, and found it apparently fur- 
nished with a few hairs. It ought, however, to be re- 
marked, that, in this American variety, the ciliae, towards 
the extremity of the perichsetial leaf, are so extremely 
brittle, as soon to render the leaf only serrated, and, from 
the structure of the hairs on the calyptra, we have little 
doubt that they are simply the broken and detached ciliae 
of the leaf : we therefore still consider the calyptra to be, 
strictly speaking, glabrous. 
Hae. The Anictangia appear to be as widely distri- 
buted as their neighbours the Gymnostoma. Europe, 
• On examining the Herbarium of Richard, we found the following ex- 
cellent description of this variety, which we take the liberty to publish 
" Folia arete quasi squamatim imbricata, ovalia acuminata ; involueri folia 
superne ciliata ; operculum conoideum, muticum ; calyptra caduca, oblonga, 
conoidea subviUosa ; peristomium nudum."^ 
