■qq F1LICES. 



character being most obvious in the barren fronds, or those in a par- 

 tial state of fructification. 



11. Litobrochia sinuata, Sp. Nov. (Tab. 14.) 



L. rhizomate repente; stipite Icevi tereti ; fronde tripinnata; pinnis 

 patentibus ovatis acutis; pinnulis subtus glands oblongo-lanceolatis 

 margine sinuatis basi obliquis obtuse cuneatis, inferioribus subses- 

 silibus, superioribus coadunatis ; venidis infimis arcuato-anastomosan- 

 tibus, exterioribus reticulatis. 



Hab. Ovolau, Feejee Islands; in thickets, at an altitude of 2,000 

 feet. 



Rootstock creeping. Frond subscandent, 18 feet and upwards in 

 height, large, spreading, glaucous on the under surface, the upper 

 of a pale green colour, tripinnate. P)*imary divisions alternate and 

 stipitate, the ultimate ones subalternate, oblong-lanceolate, the margin 

 for two-thirds of its whole length sinuate, with an entire acute point ; 

 the base oblique and bluntly wedge-shaped. Stipe long, round, smooth 

 and glossy, and of a yellowish-brown colour. Indusium narrow, plane, 

 and continuing to within half an inch of the point of the pinnules. 

 Lower opposite pair of venules anastomosing, and forming a low arch 

 nearly parallel with the costa ; the outer venules forming irregular, 

 oblong, angular areoles. 



Our figure represents the most common state of the plant ; which 

 we found to be most luxuriant when inhabiting thickets of low trees 

 and shrubs, their branches supporting its tall fronds. 



Plate 14. — Fig. 1. Portion of a frond, of the natural size. 1 a. 

 Section of a pinnule, showing the under side. 1 b, b. Sporangia. — 

 The details magnified. 



