4 8 
The Terns of South Africa. 
H. Natalense. V. D. Bosch. Syn. Hym., 46. 
H. Zeyheri. V. D. Bosch. 
H. tabulare. V. D. Bosch. 
H. fumarioides. Bory, Willd ; Schl. Adum., 56 (tab. 35 ined) ; Kunze, 
No. 1 14; Kuhn Fil. Afr. 39. 
H. flabellatum. Kaulf. 
H. capense. Schrader, Gott. Gel. Anz., 1818, p.919. 
South Africa and islands of South Pacific Ocean. 
West. — Table Mountain and Devil’s Mountain, 2300 feet (Bolus), Grena- 
dendal, Hottentots’ Holland (Lady Barkly). 
East. — Van Staden’s River (Ecklon, Drege), Howison’s Poort, Block- 
house Kloof, and Dassie’s Kranz, Grahamstown (Dr. Atherstone). 
Kaff, — Above Perie Mission Station. 
Natal. — Collected by Gueinzius, but not found by Buchanan or M‘Ken, 
though the latter gives as recorded localities, Fort Buckingham, Kranz 
Kloof. 
5. Hymenophyllum gracile. Bory. 
Plate CXLV. Fig. 1. Nat. size, b part of frond, enlarged. 
Rhizome slender, wide creeping, wiry. Frond three pinnatifid, 
deltoid, three inches long, one to two inches broad, on a wiry 
stipe one to two inches long. Rachis zig-zag, slightly winged up- 
ward, entirely without wing in the lower half, and bearing alternate 
pinnae a third to half-inch apart. Pinnae deltoid ; the lower, 
which are largest, one inch long, and a half-inch broad at the 
base ; cut to the slightly-winged rachis into three to four pairs of 
pinnatifid pinnules with four to five linear segments, those above 
gradually less divided, and with the pinnules linear and un- 
divided. Pinnules (or segments) half a line broad, one to two 
lines long, distant, blunt, and with entire margins. Sori terminal 
on the pinnules of the upper pinnae, about as broad as the 
pinnule, hardly longer than broad, with roundish triangular valves 
cut about halfway down. Not unlike H. Tunbridgense, but with 
entire margins and terminal sori. 
H. gracile. Bory; Hk. and Bkr. Syn. Fil., 58. 
H. insequale. Desv., Poir, Kuhn, Fil. Afr., 40. 
Bourbon, Mauritius, Madagascar, and Natal. 
This species is only known from South Africa by specimens at 
Kew in the Rawson Herbarium, from Pietermaritzburg, Natal 
