608 Evans: New West INDIAN LEJEUNEAE 
ing about 0.35 X 0.25 mm. or even less, the lobes are less falcate 
and spread more obliquely, the leaf cells are a little larger, averag- 
ing about 12 X 8u in the middle of the lobe, the margin is entire, 
and the lobes are bordered by a smooth band from three to five 
cells wide except near the end of the keel, where it is narrower. 
According to Schiffner the lobule in L. floccosa is unidentate, but 
the specimens from Japan, which agree in all other respects with 
Schiffner’s description and figures,* show bidentate lobules as in 
most members of the genus. The proximal tooth is remarkable in 
being the longer of the two, measuring from two to four cells in 
length and two or three cells in width at the base. It is sharply 
acute or even acuminate and is either straight, when it continues 
the free margin, or else it is more or less strongly curved toward 
the end of the keel. An exceedingly short indentation separates 
the proximal from the apical tooth. The latter consists normally 
of two cells, as in L. appressa, but is sometimes reduced to a single 
cell. Instead of spreading widely from the margin it extends 
toward the proximal tooth, thus tending to fill up the indentation 
between them and making it difficult todemonstrate. The hyaline 
papilla could not be clearly made out in the fragmentary material 
examined by the writer. 
Two other species which are apparently close to L. appressa 
are Lejeunea (Colo-Lejeunea) platyneura Spruce,t of Brazil, and 
Cololejeunea peraffinis Schiffn:,t of Java. Both are known to the 
writer by description only but should probably be referred to the 
genus Leptocolea. They are distinguished by false nerves com- 
posed of ocelli, but these are arranged in two or more rows instead 
of in a single row. Lejewnea platynenra grows on leaves, its leaf 
cells are considerably larger than in L. appressa, measuring in the 
middle of the lobe 25-334 (according to Spruce), and there are 
further differences in the bracts. In C. affinis the median leaf 
cells measure about 14 X 8u (according to Schiffner), and the 
lobular teeth are more complex than in L. appressa. 
* Nova Acta Acad. Caes. te -Carol. 60: 242. pl. 9, f. 11-13. 1893. 
t Hep. Amaz. et And. 299 
t Nova Acta Acad. Caes. eC, 6o: 242. pl. 9. f. 8-10. 1893. 
