1903] ODONTOSCHISMA MACOUNIT AND ITS ALLIES 345 
leafy branches varying in position from postical to lateral, 
flagella postical or terminating leafy branches, sexual branches 
(so far as known) postical; rhizoids scanty: leaves imbricated, 
plane or slightly convex, more or less crispate, oblong to 
ligulate, on robust stems reaching a length of 2™™" and a width 
of 1™™, not margined, attached by an oblique line of insertion, 
slightly decurrent antically, more or less strongly dilated near 
the postical base, margin entire or irregularly sinuate, apex 
truncate or emarginate: leaf-cells averaging 23 in diameter at 
margin of leaf, 28 in the middle, and 32 at the base, with 
large, occasionally confluent, truncate or retuse trigones; cell 
cavities stellate with rather broad and truncate pits, cuticle 
thickened, smooth or minutely verruculose: underleaves minute, 
less than 0.1™" long, ovate to broadly orbicular, apex commonly 
rounded; slime-papillae borne on the margin and on the postical 
surface, short-lived: inflorescence dioicous: @ inflorescence on 
a short branch; involucral leaves in about three pairs; leaves 
of innermost pair free or slightly connate at the base, ovate- 
oblong, 0.1™™ long, 0.4™™ wide, bifid about one-third with narrow 
acute spreading lobes and narrow sinus, margin entire or 
irregularly subcrenulate, sometimes with one or more lobe-like 
teeth at about the middle of the sides; remaining involucral 
leaves shorter and relatively broader, those of the outermost row 
orbicular, shortly bifid, with acute tooth-like lobes; perianth 
linear in outline, 3™ long, 0.8™ wide, slightly contracted at 
the base and apex, terete (when old) in lower part, plicate in 
upper part, mouth irregularly lobed or cleft, the divisions ciliate 
with cilia one to five cells long: remaining parts not seen. 
PorTo Rico (Schwanecke), the type locality. Cuba (Wright). 
Exsic.: C. Wright's .Wep. Cubenses, without number (under a manu- 
script name of Gottsche). 
The type-specimen of O. Portoricense in the herbarium of the 
British Museum is a little less robust than some of the Cuban 
Specimens distributed by Wright. It agrees, however, very 
closely with other specimens in Wright’s collection, and the 
latter are connected by a series of intermediate forms with the 
