CHRISTENSEN, ON SOME SPECIES OF FERNS. 21 
BAKER says (Syn. Fil. 171) that this species corresponds 
very nearly with the typical Polynesian P. comans Forst. To 
me it is widely different and may be distinguished by 1) its 
compound lower pinn&, 2) much shorter lobes (2—4 cm., in 
P. comans 6—10 cm.) and 3) a single row of areoles to each 
side of the midrib. Certainly it is more closely related to 
P. Endlicheriana Ag. (P. comans & Syn. Fil.), from which it 
differs by the characters given by AGARDH. 
Pteris eretiea L. Mant. 130. 1767. forma. 
Falkland Islands: cultivated in Westpoint but trans- 
planted there from Hope Harbour or from the vicinity of 
Sharp Peak by Mr. A. E. FELTON. 
The discovery of this cosmopolitan species in the Falk- 
lands is interesting, being the southernmost locality known 
till now in America. The single leaf seen resembles mostly 
the American form of the species, but it is remarkable by 
its irregularly flexuose, once or twicefurcate, pellucid, distant 
veins, deep green colour and narrow sori. 
Hymenophyllaceae. 
Hymenophyllum cuneatum Kze. Anal. pterid. 50. 1837. 
Syn. H. rarum auctt. quoad plant. americ. 
Under this name I unite three somewhat different forms, 
which in general habit and anatomical structure are so like 
each another, that I dare not separate them specifically. It 
is beyond question that H. rarum Gay, Johow, and others 
belongs here, but I am also nearly sure that H. polyanthos 
Johow is a form of the same species. 
H. cuneatum is an intermediate between ZH. polyanthos 
or better H. sanguinolentum and H. rarum. It resembles the 
former in size and cutting, the latter in the broad segments 
and large, flat sori. 
var. 1 (— H. cuneatum Kze.?, H. polyanthos Johow, He- 
lechos Juan Fernandez 42?). 
Large; stem and lamina 6—7 em. long each; stem wing- 
