POIiTPODIEa>., IxXT. 



sonjetimes sliort free, sometimes longer, with the centre one 



uniting with the next transverse venules so as to form two 



rows of areoles between the primary veins. 



Fronds simple or pinnate, coriaceous or herbaceous. Bhizome 



creeping. — A group tolerably weU-marted by the venation, yet in 



some of the smaller species approaching Goniophlehmm, from 



which it is distinguished in nearly every instance by producing; 



two sori within the areoles instead of one, and by having medial 



receptacles. The anomalous series are found : (1) amongst the 



smaller ones, when the free veinlets are very short, and thus 



some of the sori become nearly or quite terminal, while, however, 



others are distinctly medial ; and (2) in the only pinnate species, 



in which the sori are distinctly and constantly terminal, but ia 



which the general structure of the venation forbids a separation 



from the more genuine species. 



§ Cifrtophleiium. — Sori distinctly medial on the veins. 



Es. : C. Phyllitidis, Ftb»1, I C. cffispitosum, lAnk. 



C. repens, Fresl. \ C. angustiiblium, J. jSm. 



§ Cephalosorivm. — Sori terminal on the veins. 



Ex. : C. decurrens, JPrssl. 



+ 1 Free veinlets divancate. 

 107. NIPHOBOLUS, Kaulfms, Mmm. Ml. 124. 



Ctclophobus, i?es«a«irj PYBE0siA,3fM*6e?; Candollea, JIfir&rfinpart; 

 ScTTOPTEBis, Fresl; Ceaspedaeia, lAnk in part; Sph^eobtichum, 

 Freal; PoLTCAMPluM, Fred; Apax-ophleeia, Fred; Gveosoeium, 

 PresZ J Galeoglossa, PresJ; Niphopsib, J", fi'miii ; Poltpodii sp., .iiici. 



Sori non-indusiate, globose cyclose or elliptic, superficial or 

 immersed, buried amongst dense stellate pubescence ; the recep- 

 tacles terminal or medial on the exeurrent free or irregularly 

 anastomosing veinlets. Veins internal obscure, pinnate promi- 

 nent, or uniform, from a central costa; venules anastomosing, 

 sometimes transversely parallel, forming parallelogramoid areoles 

 with exeurrent or recurrent free or occasionally connivent or 

 generally anastomosed veinlets j sometimes uniting in roundish 

 or oblong hexagonal unequal oblique areoles, with variously 



