CHARACTERS OF TRIBES AND GENERA. 281 
(Sw.) (v v.); M. frigida (Lind.) (v v.); M. Szovitzii 
(Fisch. and Meyer). 
This is the only species native of the E. hemisphere, 
being found in Italy, Dalmatia, Western Asia, and the 
Himalayas. 
157.—Onworrznis, J, Sm. 
Cassebeera sp., Hook. Sp. Fil. 
Vernation sarmentose. Fronds 1 to 1} feet long, pinnate, 
smooth, coriaceous; pinnse 2 to 3 inches long, linear, 
petiolate, deeply cut into numerous quadrangular concave 
lobes, not exceeding 1 line in breadth, which are incurved, 
and oppositely connive over the rachis, forming moniliform 
pinne. Veins free. Sporangia terminal, few, forming a 
single sorus seated in the hollow of each lobe, the margins 
of which are indusoid. 
Type. Cassebeera gleichenioides, Gardn. 
Oss.—'This genus is founded on a peculiar and remark- 
able Fern, originally discovered in Brazil by Dr. Gardner, 
and described in Vol. VI. of Hooker’s “ Icones Plantarum," - 
under the name of Oassebeera gleichenioides, in which genus 
itis retained in Hooker's “ Species” and “ Synopsis Fili- 
cum,” but as it always appeared to me not naturally related 
to the typical species of Cassebeera, I therefore deem it best 
to separate it as a distinct genus. In so doing I, how- 
ever, find it difficult to determine its position in this 
arrangement, but its small concave indusæform ` "lobes, con- 
taining the sporangia, seems to indicate affinity with Myri- 
opteris, 
Sp. O. diidinan (Oassebeera gleichenioides, Gard. ; 
Hook. Ic. Pl., t. 507). 
Native of cad district, Brazil. 
