Musct ExorTict1.—Menziesiani. 
-TRICHOSTOMUM PERICHATIALE. 
Trichostomum caule erecto ramoso, foliis lanceolatis te- 
nuiter acuminatis, perichztialibus longe vaginatis, seta 
elongata, capsula oblonga. (Tas. LXXIII.) 
Has. In sinu Dusky Bay dicto, apud Novam Zeelandiam. 
D. Menzies, 1791. 
Caules sesquipollicares, cespitosi, erecti, ramosi. Folia obscure 
sed luteo-viridia, undique imbricata, erecto-patentia, lanceo- 
lata, tenuiter acuminata, subcanaliculata, nervo ad apicem 
usque attingente percursa. Perichetialia circa setam arcte 
convoluta, ext. breviora, omnia oblonga, nervosa, nervo in acu- 
men longum angustum desinente. Capsula oblongo-cylindra- 
eea. Operculum, calyptra atque peristomium desunt.. 
It is onlv from the close analogy of this plant to Trichostomum 
vaginatum, figured at tab. 64, that I am induced to place it in 
that genus; for not only are my specimens destitute of a perfect 
peristome, but also of the calyptra and operculum. So nearly: 
indeed are the two species allied that an inexperienced eye might, 
on their first aspect, judge them to be thesame. In the subject. 
of the present plate the leaves when carefully examined will be: 
found to be never involute at their margins, also to be much. 
longer, and very gradually acuminated.; and the latter character. 
, is remarkable in the perichatial leaves. 
Fig. 1, plant, nat. size. Fig. 2, 2, leaves.. Fig. 3, perichetium.. 
Fig. 4, perichetial leaf. Fig. 5,.capsule.—magn.. 
