54 
~ uosus, gracilis inferne nudus, superne laxe foliosus. Folia caulina 
perichetaliaque siccitate crispato-inflexa, humiditate erecto paten- 
tia, lineari-lanceolata acuminata, concava margine argute serrata, 
basi dilatata subamplectente ciliata, cellulis subquadratis superne 
rotundatis obscuris areolata ; costa percurrente lamellis serratis 4-8 
dorso convexo. Capsula in pedicello brevi vix semipollicari cras- 
siusculo recto ovato-cylindrica brevis vel ore dilatato turbinata. 
Patria Alaska, A. Kellogg legit. 
A very interesting slender dark colored species, quite distinct, 
with narrow crisped leaves, and 6 to 8long flexuose cilia on each 
margin near the sheathing base, the lamelle of the costa serrate. 
The capsule is very short ovate with a wide mouth ; the peristome 
and opereulum wanting, a loose calyptra of the genus was found. 
The plant was intermingled with a variety of Pogonatum contor- 
tum. 
2. Dicranodontium nitidum, x. sp.—Laxe cxspitosum, cespites 
molles, inferné pallide rufescentes, superne pallide viridi sericei. 
Plante graciles, simplices vel superne parce divise sola basi radi- 
eantes. Folia inferiora minora e basi lanceolata brevi subulata su- 
periora e basi ovali-oblonga multo longiora in subulam longam 
crassam caniculatam denticulatam, dorso rugosam exeuntia, costa 
dilatata mediam partem basis occupante subulam que totam effor-. 
mante. Anguli basilares concavi eorundem reti hexagono-quadrati, 
pellucidi, superiores angusti equilaterales longiores. 
Hab. on rocks at Dixville Notch, New Hampshire, James. 
This new species well characterized by its reticulation, its strong 
bread nerve which fills the whole point from its base, and by the 
long rugose or papillose point denticulate on the back and dentate 
on the border. The leaves are generally somewhat falcate curved 
or secund at the base of the stems, erect open or even falcate and 
undulate at the top of the plants when moistened. The point of 
the leaves is not quite as long as that of Dicranodontium longirostre, 
but the nerve is thicker, broader, occupying the whole point and 
nearly one-half of the base of the leaves. The whole plant presents 
a beautiful shining lustre. : 
§ 28. Publications Received—A Sketch of the Natural History 
of the Diatomacee, by A. Mead Edwards, M. D., Microscopist to 
the Geological Survey of New Hampshire, pp. 416-505. Concord, 
NN. H., 1874. This is a separate issue of a chapter of the State sur- 
vey. It is a disputed point whether the Diatomacez belong to the 
vegetable kingdom; our author inclines with Haeckel to separate 
them under the name of Protista. They are, however, usually con- 
sidered as vegetables, and as such come under the botanist’s ob- 
servation. ‘This sketch is intended as a popular introduction to 
the study while scientifically correct. It consists of eight parts; 
relating to the general character, movements, modes of growth and 
reproduction, modes of occurrence, geological relations, and direc- 
tions for collecting and studying. There are three Albert-type 
plates from the author’s own drawings. The remarks on the occur- 
rence of Diatoms in guano and the sedimentary deposits of the 
Western basins and canons are of general interest. The author has 
