.. indusia united, forming a vertical, urceolate, extrorse cyst. 
269 ` CHARACTERS OF TRIDES AND GENERA. 
base truncate aurieulate, sessile and articulate with the — 
rachis. Veins once or twice dichotomously forked; venules _ 
sub-parallel. Sori punctiform, terminal on the exterior 
venule of each fascicle, seated anterior to the dents on the 
margin (which are not induseform), Indusium short, 
cucullate. 
Type. Davallia Hookeriana, Wall. 
Illust. Hook. Sp. Fil, vol. 1, t. 47 B; Microlepia sp., 
Bedd., F. Brit. Ind., pl. 101. 
Oxs.—In the “Species Filioum " Davallia Hookeriana is 
placed in the sub-genus Saccoloma, and in the “ Synopsis " 
it is placed under the section Microlepia, as characterised in 
the preceding genus, but from which the present species 
differ in having articulate pinnæ, this character and its 
special habit seem to indicate relationship with Nephro- 
lepis. In order, therefore, to mark its peculiarity in the 
present group, I deem it worthy to be ranked as a distinct 
genus. 
Sp. S. Hookeriana (Wall). 
A native of the principal Fern regions of India. 
144.—Loxsowa, R. Br., MS. (A. Cunn. 1836). 
Vernation uniserial, sarmentose. Fronds long, stipate, 
deltoid decompound, 1 to 14 foot high, glaucous beneath ; 
lacing lanceolate, dentate. Veins simple or forked; ve- ` 
nules free, their apices prolonged beyond the margin, : 
forming a free columnar receptacle. Special and accessory 
_ Sporangia obovate, pedicillate, seated round the receptacle, 
which is elongated beyond the mouth of the indusium. 
Ring of sporangia oblique. 
Type. L. Cunninghami, R. Brown. 
