CHARACTERS OF TRIBES AND GENERA. —— 7 
Oss.—In my “Genera of Ferns,” 1841, I noticed the 
peculiarity of the species in the preceding genus, and also of 
this, but then did not deem the characters sufficient to 
separate it as a genus from Polypodium. Later observa- 
tions, and the views of both Presl and Fée, induce me now 
to separate them from true Polypodiums. 
Sp.—C. obliquatus CHL), (Bedd. F. Brit. Ind. pl. 167), 
€. celebicus (Bl.), C. venulosum (Bl), C. blechnoides 
(J. Sm.), (Grammitis blechnoides, Grev. 1848*, Cryptosorus ` 
Seemannii, J. Sm. Bonplandia, vol. 9), C. Khasyanus ` 
(Hook.). ^s 
Natives of Java, Celebes, Luzon, Fiji, Ceylon and India. 
7.—THYLACOPTERIS, Kze. Herb. (1856). 
Polypodium, sp. Blume. Hook, Sp. Fil. 
.. Burculum slender. Fronds distant, stipate, linear, pinna- | 
tifid, membraneous, smooth, 1 to 2 feet high, 2 inches | 
broad, lacini articulate with the rachis. Veins once | 
forked, venules free, the exterior branch soriferous. - 
Receptacles punctiform, terminal, deeply immersed in a cyst, - 
forming elevated papille on the upper side. Sort trans- ` 
verse, uniserial near the margin of the laciniz. 
~ Type. Polypodium papillosum, Blume. 
Illust.—Bl. Fl. Jav., p. 191, t. 88. Horsf. Pl. Jav. Rar, — 
p. 6, t. 2. = 
.. Ors.—Finding that the Polypodium papillosum of Blume - 
. does not well associate with any of the species of Polypo- 
| dium as here restricted, I therefore deem it best to follow ` 
Kunze in adopting it as a distinct genus. ` The forked | 
venation distinguishes it from Prosaptia and Oryptosorus ; 
and the deeply-impressed receptacles and the articulation ` 
f the segments with the rachis from true Prelim 
d Peres qnd Nat. Ries and ser vol. 1 b Le u oo 
