the ultimate rachises at the angles, and these generally are pin- 
nated with from three to five cordato-ovate, coriaceous, obtuse, 
petiolated pinnules; the margin entire; the surface glabrous, 
or rarely subpubescent ; the veinlets several times forked. The 
petioles are moderately long. The zavolucre is continuous along 
the two sides of the pinnule, reflected, apparently formed of its 
substance, but paler and more membranaceous, quite entire and 
covering the sorus, which is equally a continued line of cap- 
sules, whose origin however appears to be from the apices of 
the veinlets ; but this is a point very difficult of determination. 
If in a pteroid Fern the receptacle of the capsules occupies a 
considerable length on the terminal veinlets, we have then the 
Platyloma of Mr. J. Smith (Adiantum paradoaum of Mr. Brown) ; 
but such can hardly be said of the present species, which is 
likewise called by him Platyloma ; the additional character, ap- 
plied equally by Mr. J. Smith (as by M. Fée, to his Pella), of 
the ebeneous stipes and rachis, does not hold good here, as is 
above observed. 
Fig. 1. Fertile pinnule, seen from beneath. 2. Portion of a fertile pinnule, 
with the involucre raised to show the sorus :—magnified. 
