PLATYCEBIEJ3. TTIII. 



proximate and sub-confluent in two rows on the contracted 

 upper pinnae ; the receptacles consisting of a crowded mass of 

 anastomosed venules. Veins (sterile) : pinnate from a central 

 costa, prominent, the venules prominent, transversely anasto- 

 mosed, forming nearly equal-sided areoles, within which the 

 veinlets again anastomose, the ultimate areoles including free 

 sterile divaricate veinlets ; or (fertile) : more equally and crowd- 

 edly anastomosing between the primary veins. 



Fronds coriaceous, pinnatifid, and sterile below ; pinnate, 

 contracted and fertile above; the pinnse sessile, articulated. 

 Rhizome creeping. The netted receptacle of this genus asso- 

 ciates it with Platycerium; but in habit and aspect the species 

 resemble Drynaria. 



Ex. : D. splendens, J. Sm. \ D. pilosum, J. 8m. 



(c) Sori in linear sub-marginal patches. 

 17. JENKINSIA, Hooker, Gen. Ml t. 75. 



NOTHOCHI^HJE sp., Wallich; CAMPII sp., Prel; CYBXOGOTO sp., J. 

 Smith ; LoMAEiopsinis Bp., Mettenius. 



Sori superficial, broadly linear, continuous, sub-marginal ; the 

 receptacles consisting of the (about 3) external series of arcuate 

 venules with their excurrent veinlets : thus compound. Veins 

 pinnate from a central costa, prominent ; venules opposite anas- 

 tomosing in angulate (two-angled) arcs, from the angles of which 

 proceed excurrent veinlets ; the veinlets near the margin free in 

 the sterile, often anastomosing in the fertile fronds, the rest free, 

 clavate at the apex ; veins not extending to the margin. 



Fronds pinnate, dimorphous, coriaceo-membranaceous, often 

 proliferous, the fertile contracted. Rhizome decumbent. This 

 genus is allied to the Aerostichece through Paecilopteris ; indeed 

 it may be only a dilated condition of this genus with the recep- 

 tacles abnormally areolate. The arcuate soriferous veins also 

 indicate an affinity with Meniscium; but the compound condition 

 of the receptacles associates it with Platycerium and Dryo- 

 stachyum, in the group Platyceriece the distinguishing feature 

 of which, consists in the netted receptacles of the confluent 

 masses of spore-cases. 



Ex.: J.undulata, Hook. 



o 2 



