Ij6 NATURAL HISTORY BULLETIN. 



6. N. SKINNERI Hook. 



Hook., Sp. Fil., vol. iv, p. 64; Hook, and Bak., Syn. Fil., p. 287; Hemsl., 



Biol. Cent. Am., vol. in, p. 650. 

 Aspiduim skinneri Hook., Cent. Ferns, pi. xxiv; Mett., Ub. Ein. Farng., 



pt. iv, p. 92. 

 Aspidium francoanum Fourn., Sertum Nic, p. 255. 

 Nephrodium stenophyllum Bak., Jour. Bot., vol. xxn, p. 363. 

 Nephrodium harrisoni Bak., Sum. New Ferns, p. 66. 



Found in mud among rocks near the water's edge along 

 the Los Sabalos River. Quite rare. Nine plants with seven- 

 teen fronds were collected after careful search. 



The specimens are small, the largest frond measuring as 

 follows: stipe 1% in.; frond 4 in. in length and a trifle over 

 *4 an inch in width. Only three fronds show a disposition 

 toward the separation of the lowest pair of lobes from the 

 lamina. In the remaining fronds the lobes diminish quite 

 regularly from the center toward both the base and apex of 

 the frond, disappearing toward the apex entirely. The stipes 

 are both hairy and sparsely scaly, and the midribs on both sur- 

 faces, and the main veins on the lower surface, are hairy. 



Several fronds show the prominently ciliated, deciduous 

 indusium. 



The details figured in Hooker's excellent plate accurately 

 represent the Nicaraguan material, but occasionally the two 

 lowest veins of adjacent groups unite before reaching the sinus. 



Baker's description of IV. stenophyllum ( = harrisoni') shows 

 no important distinction between his species and skinneri, and 

 a specimen of N. harrisoni from Costa Rica (J. Donnell 

 Smith's no. 5097) in the Shaw Herbarium is undoubtedly the 

 same as the Los Sabalos specimens, though the latter are 

 much smaller. 



Reported from Chontales by Hemsley, and by Fournier(as 

 A. francoanum). 



7. N. parasiticum (/,.) Shimek. PI. xvm, Fig. 10. 



Poly podium parasiticum L., Syst. Nat., vol. 11, p. 693. 



Aspidium molle Jacq., — Swz., Syn. Fil., p. 49; Mett., Fil. Hort. Bot. Lip., p. 

 91; Eaton, Fil. Wr. et Fend., p. 211; Roth., Les Foug., vol. 11, p. 126. 



