CATALOGUE. 341 
MUSCL. 
By THomas P. JAMES, CAMBRIDGE, MASs. 
The Botanists of this Exploration have proved themselves excellent 
bryological collectors, and have apparently made the collection of mosses 
a specialty, and have been careful to procure specimens mostly in a fruit- 
ing condition. Explorers generally ignore these minute objects, or consider 
them too trifling for their attention. 
This enumeration presents several novelties not heretofore found in 
this country, and a few of rare species. 
It is deemed advisable to add concise descriptions to the less wn 
species. 
SpHacnum acutiroLium, Ehrh.—This specimen has the male organs 
beautifully developed in the purplish amentaceous branches in the coma 
and along the stem. 
Hab.—Twin Lakes, in bogs and meadows. 
SPHAGNUM CUSPIDATUM, var. RECURVUM, Beauv.—Distinguished from 
the above by its flaccid, attenuated branches and spreading leaves, which, 
when dry, are undulated and slightly crisped. 
Hab.—Twin Lakes, in swamps. 
GYMNOSTOMUM RUPESTRE, Schweeg.—This special plant has much resem-. 
blance to, and might be mistaken for, G. curvirostrum, but for the margin of 
its leaves being plane (not recurved). . 
Hab.—Twin Lakes, on damp clay ground. 
Wiest crisputa, Hedw.—Known from W. cirrhata by its more crisped 
and plane-margined leaves and capsule without an annulus. 
Hab.—Twin Lakes, on rocks in mountainous districts. 
CyNoDONTIUM VIRENS, Hedw. 
Hab.—Twin Lakes, on old logs by mountain streams. 
CyYNODONTIUM VIRENS, var. SERRATUM, B. & S.—Distinguished by its 
strongly serrated leaves and less strumose capsule. 
Hab.—Twin Lakes, on old logs in bogs. 
