468 Best: REVISION OF THE 
papillate on under surface, usually smooth on upper alar ; cells 
quadrate, in 5 or 6 rows; median oval-rhombic to oblong-fusi- 
form, 7-9 » wide, about twice as long ; branch-leaves broadly lan- 
ceolate, scarcely secund, 0.25-0.35 mm. wide, 0.5-0.7 mm. long: 
monoicous : perichetial bracts appressed, plicate, costate, long and 
narrowly acuminate, entire or serrulate above ; pedicel 1.5 cm. 
long, grooved, twisted to the left below, to the right above, 
curved, reddish; capsule oblong-cylindric, curved, tapering at 
base, wrinkled when dry; urn about 2 mm. long, 0.6 mm. wide ; 
exothecial cells oblong-linear, thick-walled ; annulus broad, 2-3 
rows of. cells; teeth lanceolate-linear, 0.6-0.7 mm. long, 0.03 
mm. wide, yellowish below, pale above, densely papillose, divi- 
sural line faint, ventral surface strongly lamellate ; endostomial 
band yellowish, papillose, about one seventh the length of the 
teeth ; segments as long as teeth, split, scarcely open on the keel ; 
cilia rudimentary ; operculum whitish, subshining, narrowly conic, 
about one half as long as the urn; calyptra cucullate ; spores 
smooth, 10-13 /, mature in early summer. On the base of trees, 
rarely on decaying wood, in sandy places. (PLATE 15, FIGS. I-I 3.) 
Type Locatity: Delaware; collected by Mr. A. Commons, 
June 9, 1894; type in the New York Botanical Garden. 
DistRiBuTION: From Maine southward along the coast to 
Virginia and northward and westward to Minnesota and Dakota. 
Maine (Merrill) ; New York (Maxon, Grout); New Jersey (Best) ; 
Delaware (Commons); Maryland (Smith, Holzinger) ; Virginia 
(Vail and Britton); Ohio (Lesquereux); North Dakota (Hol- 
zinger) ; Minnesota (Holzinger). 
ExsiccataE: S. & L. Musc. Bor. Am. 243 and 365 as L. ob- 
scura; Ren. & Card. Musc. Am. Sept. 192° as L. polycarpa forma. 
My first acquaintance with Z. arenicola was in 1892 while col- 
lecting in the New Jersey pine-barrens. Recognizing its distinct- 
ness as a species specimens of it were distributed under this name. 
Subsequently, however, while examining the collection of the New 
York Botanical Garden, the same species was found under the 
name of Z. Donnellii, having been collected in Maryland by Mr. 
J. Donnell Smith and so named by Austin. The type being in a 
poor condition, with only fragments of peristomes and no opercula, 
it was thought best to discard Austin’s manuscript name and use 
a new type as well as a new name. 
L. arenicola is readily distinguished from all other species of 
Luleskea by its curved capsules, longer teeth and segments, longer 
