OF THE FORTY-NINTH PARALLEL OF LATITUDE. 25 
Amongst the American Orthotricha there occur several species 
which appear to have been overlooked, or to have been passed 
over as states of European species, but which on comparison do 
not appear to be identical with any previously known ; of these 
are— 
O. parvuLum. Monoicum, humillimum, folis patentibus elliptico- 
lanceolatis sensim acutis acutatis acuminatisque nervo carinatis, mar- 
ginibus vix recurvis, cellulis basi ad angulos alares paucis oblongis 
fuscis, ceteris omnibus rotundatis, perichetialibus basi latioribus, 
theca immersa obovata plicata, peristomio dentibus 16, calyptra pli- 
cata ramentosa.— O. Sturmii, Sullivant. 
Hab. Prope Santa Fe Neo-Mexicanorum, Wright, et m Nove Anglie 
alpibus, Oakes. 
Very different from O. Sturmii, Hsch. et Hoppe, and in its 
foliage more like O. tenellum, Bruch. 
O. rvsinLvM. Monoicum, brevissimum, folis patentibus ovato- 
lanceolatis, inferioribus acutis, superioribus late acutatis obtusiusculis 
nervo carinatis, marginibus reflexis, cellulis basi quadratis pellucidis, 
superioribus rotundatis granulosis, perichetialibus interioribus brevi- 
oribus, theca immersa obovata siccitate 8-plicata — peri- 
stomio dentibus 16 brevibus. 
Hab. Pennsylvania, Drummond. 
Less than O. tenellum, and with a very thin, short, pale capsule, 
and foliage more rigid than in O. parvulum. 
O. CoULTERI, sp. nov. Monoicum, habitu staturaque O. tenelli, foliis 
densis e basi erectiore subovali angustatis lanceolatis patentibus, api- 
cibus latiusculis obtusiusculis subacutis, marginibus recurvis, nervo 
sub apice evanido carinatis, cellulis basi in folii medio paucis oblongis 
elongatisque latioribus, inde ad apicem abbreviatis quadratis rotun- 
disque distinctis papillosis, perichzetialibus erectioribus latioribus ellip- 
tico-lanceolatis aeutioribus, vaginula ramentis elongatis pilosa, theca 
emersa ovali-eylindracea octies plicata in pedunculo sensim angustato, 
peristomio dentibus ciliisque tertia parte brevioribus angustis 8, ca- 
lyptra ramentis brevibus appressis obtecta. 
Hab. California, Coulter. 
Very similar in appearance to O. tenellum, Bruch, but its cap- 
sules exserted beyond the apices of the perichetial leaves, which 
are more acute, its calyptra more pilose, its cilia short, and its 
male flowers larger. 
The deseription of O. eylindrocarpum, Lesq., in which the 
peristome is stated to be “ dentibus externis pallidis, eiliolis robustis 
longioribus albidis artieulatis," and the calyptra “ valde pilosa," 
indicates another nearly allied Californian species. 
