DAVALUA. 171 



thin margin beyond the sori crcnatc serrated and often lo])ed 

 towards the attenuated ajiex obliquely cuneate at the base, veins 

 close ])arallel simple or forked, involucres shallow hali-cup- 

 sha})cd forming a continuous line along the margin. — Spr. 

 Syst. Ve<jct. iv. p. 119. Saccoloma clegans, Kcnilf. "in Berl. 

 Jahrh.f. die P/mn/i. 1820, p. 51." En. Fil. p. 224, t.\,f. 12. 

 Hook. Gen. Fil. t. 58, /. 1—4. Kze. in Sehkh. Suppl.'t. 41. 

 NeurojUcris clegans, Desv. Mem. de la Soc. Linn. Par. v. p. 

 292, t. 8,./: 2. 



Hal). Brazil, Langsdorff, Sellow, Mrs. M. Graham, Bei/rich, Prince de 

 Nieinoicd, Rirdil, Gardner, n. 15!) and 5325, (woods, Gongo Soko). Isth- 

 mus of Paiiinna, Dr. Sinclair, Barclay. Interior of Westmoreland Co. and 

 Fox's Gap, St. (ieorffe, Jamaica, Purdie. Guiana, {Desraux). — A splen- 

 did and tndy Ijcautiful Fern, which, according to Mr. Purdie, who lias re- 

 cently had the pood fortune to discover it in Janiaica, "grows, or rather 

 climbs, to the height of "20 feet,'' no dou1)t by means of its caudex, which 

 lie adds is "creeping." The fronds tluniselves are 5 — G feet and more hi 

 height. Stipes 1 — 4 feel and, as well as the main rachis, glossy brown. 

 Piunffi of a delicate, membranaceous, scmipcllucid texture, liright green, 

 often a foot long and 1 — 2 inches wide ; the base obliquely cuneate, 

 sometimes, as if l)y accident, deeply lobcd in the lower half (as figured by 

 Kimze, 1. c), attenuated into a narrow caudate serrated acumen at the ex- 

 tremity. Sori so close as aiipaiciitly to form an almost uniiitcrrnpled line 

 on both margins, nearly from liie base of the pinnule to the base of the 

 acumen. 



As already observed, Professor Kunze (and Mr. J. Smith) considers 

 the crenatures of the pinna5 of Saccoloma as spurious involucres, and he 

 desci-ibes, in Schkh. Fil. Suppl. p. 86, a nearly allied genus with which I 

 am unacquainted, and which he thus characterizes: — 



"Amaukopelta, Kze. .S'ori ajiiei venarum subclavato inserti, orbiculares, 

 plani, lincani submarginalcm formantes. Jndu.sium duplex: spuritim, cre- 

 iiac marginis lacinearum primo revolntas, dennim retracts; veriim, coria- 

 ceuni, rugulosum, orbiculare, basi excisuin (alrovirens), margine extenuate 

 circumcirca apcrtum." 



"A. Breutelii. — Frons coiiacea, pinnato-pinnatifida, basi pinnarura sub- 

 pinnata. Vence e costa laciniarura ortae, furcatie, rarius simplices. 



"Hab. St. K\ns, Breutel." 



49. D. Iniraijana, Hook. ; fronds (tufted.?) ovato-lanceolate 

 pinnated, pinnae submembranaceous opaque oblong-lanceo- 

 late obtuse petiolulate very unequally and somewhat doubly 

 crenate obliquely cuneate at the base, sori forming a continu- 

 ous intramarginal line one at the base of each tooth or lobule 

 of the crenatures, veins oblique once to thrice forked some- 

 what divaricating, involucres reniform. (Tab. XLIX. A.) — 

 Hook. Gen. Fil. t. 58, B. /'. 5, G. Kze. in Schkh. Fil. Suppl. 

 t. 86. 



Hab. Dominica, Dr. I tar ay. — A very distinct and well marked plant, 

 yet assuredly allied to the preceding. Kunze has retained this in Saccolo- 

 ma, and correctly enough ; but it is cjuite evident the crenatcd margin lorms 



