140 FERNS I BRITISH AND FOREIGN. 



7. N. refractum, J. Sm. Polypodium refractum, FiscJi. et 



Mey. ; Loive's Ferns, 2, t. 48. Goniopteris refracta, 

 /. 8m. Cat Cult. Ferns, 1857. Brazil. 



8. "N. truncatum, J. Sm. Aspidium truncatum, Gaud, in 



Freycinet's Voy. 1. 10 ; Lowe's Ferns, 6, t. 12. Sand- 

 wich. Islands. 



9. N. abortivum, /. 8m. Aspidium abortivum, Blume. 



Aspidium decurtatum, Kunze. Java. 



10. N. venustum, /. 8m. Aspidium venustum, R. Hew. in 



Mag. Nat. Hist. 1838, p. 464. Jamaica. 



11. N. molle, R. Br. ; Schott, Gen. Fil. t. 14; Hook. Gen. Fil 



t. 48 B. Aspidium molle, Sw. ; Sclik. Fil. t. 34 B. 

 A. violascens, Link. Var. corymbiferum, Moore, in 

 Gard. Chron. 1856 ; Lowe's Ferns, 7, 1. 13. Tropics, 

 very general. T. 



12. N. patens, 7. 8m. Demerara. 



66. MESOCHLJENA, E. Br. 



Vernation fasciculate, erect. Fronds 2-4 feet high, bipinna- 

 tifid. Veins costseform, pinnate ; the lower pair of venules 

 anastomosing, the others free, parallel. Receptacles medial, 



Genus 66. Portions of barren and fertile frond, natural size; ditto enlarged. No. 1 . 



elongated. Sori oblong-linear. Indusium hippocrepiform, 

 attached longitudinally on the centre of the receptacle, having 

 sporangia in its axis on each side, its margin free. 



