SELLARDS: NEW C^ENUS OF FERNS. 185 



characteristic. It is large iu proportion to the frond, some- 

 what irregular in shape, sloping slightly to an obtuse apex. 

 In a frond 15 cm. high, the terminal pinnule is 2 cm. long. 

 But the much larger apex (plate XXXVIII, fig. 2) , apparently 

 referable to this species, indicates that the terminal pinnule 

 varies with the size of the frond, Midvein distinct, percurrent, 

 running down the rachis 1 or 2 mm. before uniting with it, 

 continuing almost to the apex. Lateral veins oblique, strong, 

 simple or forking once, almost straight or distinctly curved, 

 10 or 12 per cm. at the border. Veins strongly curved in pass- 

 ing from the rachis to the auricled base. The midvein of the 

 pinnule becomes less marked in pinnules nearing the apex of 

 the frond, lateral veins more pronounced, passing gradually 

 into the lateral veins of the terminal pinnule. 



This species, the smallest of the genus, is common, and its 

 general form usually well preserved. The venation, however, 

 is indistinct on most of our specimens. One frond (plate 

 XXXVIII, fig. 3), fortunately, has the venation well pre- 

 served. The rachis, seen from the upper side, is marked by a 

 broad, shallow groove ; from below it presents a broken, striate 

 appearance, due to the decurring midveins of the pinnules. 

 Plate XXXIX shows three of the fronds, natural size, and 

 almost complete. The frond fig. 1 has the apex broken and 

 displaced to one side. With several good specimens at hand, it 

 is possible to follow the development from the young to the 

 full-grown frond. The pinnules, at first close, ovate, and ob- 

 lique, become, by the growth of the frond, more distant, elon- 

 gate, curved back at the apex, lax in appearance, reaching at 

 last the extremely curved form seen in fig. 3, plate XXXVIII. 



The specimen plate XXXIX, fig. 1, was among those col- 

 lected by Mr. Sterling. The others were collected .by the 

 author. 



Glenopteris lineata, sp. nov. Plate XXXVII, fig. 3; plate XXXVIII, figs. 4 

 and 5. Type No. 5108. 



Fronds of medium size, deeply pinnatifid or pinnate, some- 

 what fleshy, narrowly elliptical, narrowing gradually to a long 

 apex, petiolate at the base. Rachis strong, longitudinally 

 striate or wrinkled, half cylindrical or flattened, broken off 

 short at the base. Pinnules alternate, close, or more distant in 

 the middle of the frond, rounded above the base, united by a 



