BRYOLOGICAL NOTES 47 
quite clear to me that the present plant does not belong to this 
genus, from all species of which it differs widely in its dense papil- 
lose areolation and the differentiated perichetial leaves. 
opinion the present species shows in areolation more affinity with 
Barbula clap than with any other genus. We must note, 
brevisetacea Hampe & C. Miill. —elongated perichetial leaves ‘ike 
those of the present species. The main point of difference in 
Schwaegrichen’s plant is the shape of the calyptra. The calyptra 
rare pea described by Schwaegrichen as ‘ subulata, latere fissa,” 
figured as split at one side only, as in the loots calyptra of 
Barbuda, is really, as Mitten first pointed out, more or less deeply 
split at the base on all sides, and is consequently mitriform. ai 
is a single calyptra in Schwaegrichen’s type-specimen, and 
split in three places at the base (see figs. 19, 20). I have also nt 
calyptre in Dusén’s specimens of S. crispatula in the Kew Her- 
barium, and in every case they are split in several places at the 
base. In Lechler’s plant in Schimper’s herbarium, also, thes joa 
calyptre show signs of splitting at the base rE several lines, 
the fruiting examples of S. Hookert sent by rown the shape 
of the calyptra, which was oe as + mitiform, lobed at the 
base,” s is shown at fig. 15. It may be observed 
here that among the calyptre of ‘8. crispatula examined one was 
found which was deeply split on one side only, two very short clefts 
being on the other side ; so that the shape might be described as 
* suboncullate,’ ” I have seen the same variation as this in the 
Bot 
xvii. pl. viii. fig. 14). It has not apparently been hitherto notiond 
that the apex of the calyptra is distinctly rough with blunt tubercles 
(see fig. roe a); this can be most clearly seen in the young calyptra. 
e who e the present plant is perhaps best treated as 
gen sentenlle distinct from Barbula on account its — 
leaves, vine give a very distinct appearance to the plant, and its 
scabro orm calyptra, and we may eva this genus ‘Calypto- 
pogon, with its single species C. mnioides, as a connecting link be- 
tween Streptopogon and Barbula (Syntrichia). 
As mentioned above, Brotherus has maintained Calyptopogon 
as a shiren, and enumerates in it C. mnioides, C. crispatulus, 
~* ein C. crispatus, and C. oe Brotherus Saneaks, 
. mnioides. se nahe 
a‘ tessellated ” mem brane), w. hich extends from the mouth of 
capsule to one-sixth or one-seventh of the length of the peristome 
(fig. 1 . 
sta the “limb” of the leaf in C. wie es it-amay(tee 
noted here that this is unistratose throughout, even in the basal 
