JAMESONIA. 105 



pinnatifid, intermediate piniire ovato-lanceolate piniiatifid, ter- 

 minal pinna long petiolate broad-ovate acuminate deeply pin- 

 natifid especially at the base, veinlets uniformly reticulated, 

 areoles with no included free veinlets, costular areoles large, 

 sori rather irregularly scattered dorsal or compitaL 



Hab. Monlmeiiie, among limestone rocks, Rev. C. S. P. Parish, n. 92. Gaboon 

 Ilivcr, W. trop. Africa, Luzon, Gustav Mann. — This delicate and very membrana- 

 ceous Fern was brought under my notice by my valued correspondent Mr. Pa- 

 rish, as resembling small specimens of Aspidium coadunafuin {A. cicularhim, nob.) ; 

 yet it is very different in its caudex, in the texture of the frond, in the venation, 

 and in the entire absence of involucre in all our many specimens. Our African 

 plant from the Gaboon is identical with the Indian one. My Polyp. ( Dictyopteris) 

 memhranaceum, published in Blakiston's ' Five Months on the Yang-tsze,' proves 

 on further investigation to be an Aspidioid Fern, of which I here give the cha- 

 racter in a footnote.* 



SuBORD. X.— GRAMMITIDE^. 



Sori more or less oblong or linear, destitute of Involucre. — 

 Grammitaceae, Pr. [including Tcenitidese, Pr.), distinguished 

 by the generaJhj very elongated narrow naked sori, simple or 

 branched or variously anastomosing, arising from the veins or 

 extending to the parenchyme. — The genera here adopted are, 

 Jamesonia, Notliochlfena, Monogramme, Gymnogramme {in- 

 cluding Grammitis), Brainea, Meniscium, Antrophyum, A^it- 

 taria, Taenitis, Drymoglossum, Hemionitis. Gen. 1-11. 



1. Jamesonia, Hook, and Grev. 



(Hook, and Grev. in Ic. Fil. tab. 178. Hook. Gen. 

 FiL. TAB. Xni. Kunze, in part. Pteris, Cav., Sw., Willd. 

 Cheilanthes, Desv. Allosorus, Pr. Gymnogramme, A7.) 



Sori oblong arising from the disk of the pinncB, on the fla- 



* At p. 40 of this volume, after Aapidlum (EuaqndiumJ calcareum, 7i, 57, 

 should be inserted : — 



bl his. Aspidium (Euaspidium) membranaceum,\{o6k.; caudex short rather 

 stout or ascending or subrcpand crowned at the apex with a conical mass of black 

 linear-subulate glossy scales, stipites subfascicled a span long slender paleaceous 

 only at the base with the same scales as are upon the caudex, frond about as 

 long as the stipes membranaceous dark blackish-green puberulous especially be- 

 neath deltoideo- or cordato-ovate acuminate bipinnate in the middle, subl)ipinnatilid 

 at the apex, at the base tripinnate, primary pinna; 5-7-petiolate inferior ones 4 

 inches long semiovate the lower half being the broadest subfalcate, thtir se- 

 condary pinnae sessile lanceolate deeply pinnatifid, the segments oblong entire or 

 crenate, intermediate primary ones ovato-lanceolate deeply pinnatifid with seg- 

 ments like those just described, the lowest segments sometimes five, the large 

 VOL. V. P 



