LYGODES:. CEBATOPTEEIDINE.E. CXV11. 



having a many-rayed apical ring, attached at or near the apices of 

 the venules in an irregular intramarginal series. Veins (of the pin- 

 nules) pinnate, from a central costa; venules simple or forked, free. 



Fronds bi-pinnate or sub-tri-pinnatifid, herbaceous. Ehizome 

 short, creeping. This genus and Trochopteris, differ from the 

 other genera of the group, in the production of their spore-cases 

 near the margin of the flat scarcely contracted segments. 



Ex. : M. thurifraga, Su>. 



164. TROCHOPTERIS, Gardner, HooJc. Lond, Journ. 



Sot. i. 74, t. 4. 

 ANEimuE sp., Auct. 



Fructifications borne on the laciniated margins of the some- 

 what contracted flat leafy lobes (basal pair). Spore-cases bluntly 

 ovate, having a many-rayed apical ring, which extends from the 

 apex half-way down ; sessile bi-serial on the upper or inner face 

 of the narrow marginal segments. Veins flabellato-dichotomous ; 

 venules free. 



Fronds rosulate, scarcely an inch long, spreading horizontally, 

 sub-rotund, pilose, five-lobed, the two basal lobes somewhat con- 

 contracted, flat, laciniate, sporangiferous. Ehizome short, erect. 

 A singular little plant, in habit more like a rosulate lichen than 

 a fern ; sufficiently distinguished from Anemia by the fructifica- 

 tions being produced on flat lobes so little changed and lying 

 flat in the plane of the frond, that they look like mere diminished 

 basal lobes. 



Ex, : T. elegans, Gardn. 



Ord.~ POLYPODIACE^!. Tr. CEEATOPTEEIDINE^. 



165. CERATOPTERIS, Brongniart, Bull. Soc. Phil. 



1821, 184 ; Id., Diet. Class. a" Hist. Nat. iii. 351. 



TEIEOZOMA, B. Brown; CETPTOQENIS, Richard MS; CHLADOSTACHYS, 

 WallichMS; ELLOBOCAEPUS, Kaulfussi; PAEKEBIA, Hooker; BELVISIA^ 

 3irbel, in part ; FUECABIA, Deivaux ; PTEKIDIS sp., Auct.; ACEOSIICHI 

 sp., Auct. 



Sori indusiate, continuous, occupying the longitudinal veins, 



[May, 1857.] 



