— 290 — 



intra marginem terminantes, interdirai (in speciminibus paucis) marginem 

 attingentes. — Squamæ stipitis rachidisque ovato-acuminatæ, subintegræ. 



L. serratifolius is a very constant and uniform species; as forms I 

 can separate only a forma caudata: its pinnæ are about 3 cm below their 

 point suddenly narrowed to a caudate apex. As in the two next species 

 the meshes include occasionally a single, free veinlet, more accidentally than 

 normally. The terminal pinna is often proliferous, especially in the more 

 thinleaved forms; such forms also are more densely (but always sparely) 

 clothed with scales along the midrib of the, as a rule, more deeply serrated 

 pinnæ beneath and on the rachis, and have evidently grown on a more 

 damp growing-place. The not-proliferous forms (var. undulatum Fée, 

 Crypt, vase. Brésil 1: 17) are more rigid, the edges of the pinnæ nearly 

 entire and often quite destitute of scales. The venation is very uniform 

 and makes a good and easily recognizable character for this species; the 

 meshes are larger than those of the other species of the group. 



Specimens examined: 



Brasilia: Sine loco: Mertens (type specimens, HH, HB); Langs- 

 dorf (f. caudata: HB); Martius (HB); Sellow (HB); P. V. Lund (HH); 

 Mendoza n. 1368 (f. caudata', HB). — Rio de Janeiro: Raben (HH); 

 Miers (HB); Beyrich (HB) ; Schottmüller (HB) ; Glaziou n. 953, 954, 1671, 

 2422 (HH). — Serra £ Estrella: Beyrich (HB). 



Venezula: Col. Tovar, in sylvis lapidosis, reg. temp., Moritz n. 447 

 (HB; Lomaria Bredemeyeriana KL). 



Peru, Lechler n. 2305 (HB); a fertile leaf only; the determination 

 rather doubtful. 



The species is mainly confined to the mountains near Rio; only one 

 collector (Moritz) has gathered it on another locality, in the Andes of 

 Venezuela. The other andine localities recorded by Hooker in Spec. Fil. 

 are to be referred to other species, possibly hitherto undescribed; the 

 locality, Mexico, mentioned in Syn. Fil. is surely to be referred to L. Bernoullii. 



Fig. 3. Pinna of the type specimen in Herb. Haun. 3 U nat. size. 



4. Leptochilus Lindigii (Mett.) G. Chr. — Fig. 4. 



Syn. Chry sodium Mett. Ann. sc. nat. V. 2:204. 1864. — Acrosti- 

 chum Bak. Syn. Fil. 423. 



Lamina folii sterilis late ovata, 7 — 8 dcm longa, pinnata cum impari. 

 Pinnæ 10—12 jugæ, patentes, elongatæ, 2 — 2 1 /2 dcm longæ, 4 cm latæ, sessiles 

 vel breviter petiolatæ, basi superiore truncata, inferiore rotundatæ, versus 

 apicem longe acuminatæ, inæquilaterales : latere superiore inter costam et 

 marginem 2 l /4 cm lato, latere inferiore l 3 /4 cm lato, membranaceæ, læte virides, 

 glabræ et nudæ. Margo pinnarum, præsertim superior, e medio versus 

 apicem grosse crenatus crenis obtuse dentatis, infra medio leviter crenato- 



