DESCRIPTION OF SPECIES. PP. 85 



Jcuma, wave) margin, with short round lobes. Nerves of 

 the united pinnules, leaving the rachis of the pinnse under 

 an acute angle, arcuate-diverging, alternate ; secondary 

 nerves of the pinnules (tertiary of the pinna), arising at a 

 very acute angle, numerous, all verging towards the margin 

 of the pinna, the two lowest anastomosing at the sinus of 

 the lobules with their neighbors, simple, forming with the 

 rachis a long triangle destitute of nerves, the others reach- 

 ing the margin of the lobule, simple, and forked." 



As this generic character is based on a single species, nnd 

 since we have several plants which have the essential fea- 

 tures of the genus, but differ in the nervation from Goni- 

 opteris too much to be included in the latter genus, we 

 think it proper to amend the generic character, as given by 

 Schimper, so as to include the plants found by us. As 

 amended we would have the following : 



Frond, pinnate or bipinnate ; pinnse, linear-elongate, or 

 elongate- oblong; undulate, or pinnatihd; mid-nerve of the 

 united pinnules, leaving the rachis under an acute angle, 

 alternate ; lateral nerves, rising at a very acute angle, all 

 verging upwards towards the margin of the pinnules, the 

 two lowest uniting with or meeting the corresponding ones 

 of the preceding and following pinnules at the sinus of the 

 lobes, simple or forked, and forming with the principal 

 rachis a triangular area destitute of nerves, the others reach- 

 ing the margin of the lobes, simple or forked. 



Cymoglossa oMusifoUa. Sp. nor., PL XXXI, Figs. 5-6. 



(Frond, bipinnate ; pinnse, long, narrow, and tapering 

 gradually to the summit, sessile, with a cordate appearance 

 at the base, produced by the projecting downwards of the 

 lowest pair of lobes or united pinnules; rachis, rather strong 

 and pilose ; pinnules, ovate or elliptical, obtuse, united to 

 near the apex, rather fleshy, the lower pair heteromorphous, 

 larger than the normal ones, and slightly dellexed ; primary 

 nerves, distinctly marked, slender ; lateral nerves, very dis- 

 tinct, but slender, leaving the median nerve under an acute 

 angle, arching upwards towards the margin of the pinnules, 

 normally simple, but frequently forking; the lowest pair, 



