CX. GENEBA Of FFKNS : 



transparent ferns. The species which have at different times 

 been separated under the names above quoted as synonyms, do 

 not appear to us to present any generic differences. We admit 

 as distinct Feea and Hymenostachys with contracted fertile 

 fronds, the former having free, the hitter anastomosed veins. 



Eutrickomanes. Involucres truncate, plane or spreading at the mouth. 



The following groups have certain pecularities in the arrangement of the 

 cells of their tissue, which produce the appearance of their being traversed by 

 obscure secondary veins. In other respects Abrodictyum and NeuropKyll, 

 belong to the Sutrichomane, ; and Hemiphlebium to Didymoglonvm. 



* Abrodictyvm. Venuloid cells obliquely decurrent with the cosUJike 



vein, and an intramarginal venuloid line. 

 Ex.: T. Smithii, Hook. 



* yeuropkyttum. Venuloid cells wavy, transverse between the veias. 

 Ex. : T. pinnatum, Hedv. \ T. pennatum, Ktft. 



* H*ipM*bi*m Venuloid cells forming an intramarginal line, with re- 



current lines proceeding inwards between the veins. 

 Ex. : T. muscoides, S*>. \ T. pusillum, S. 



155. PEEA, Sory, Diet. Class, ffffist. Nat. vi. 446, fc 68. 



TBICHOMAJTIS sp., Auct. ; HnraxosiACHTBis sp., Pretl. 

 Sori involucrate, seated in eitrorse-marginal cysts, placed on 

 the margins of contracted fronds, the veins continued into 

 filiform exserted clavate receptacles, which are free within the 

 cyst*, and bear sessile lenticular spore-cases at their base. Into- 

 lucret free sub-pellucid club-funnel-shaped, truncate at the 



