136 NATURAL HISTORY BULLETIN. 



L. oligostachyum Desv. 



Fourn., Sertum Nic, p. 261, Ometepe; Hemsl., Biol. Cent. Am., vol. HI, p. 

 695, on authority of Fournier. 



Anemia Swartz. 



A. adiantifolia Swartz. 



Fourn., Bull. Soc. Bot. Fr., vol. xvn, p. 236; Fourn., Sertum Nic, p. 261, 

 near Nandaime; Hemsl., Biol. Cent. Am., vol. Ill, p. 692, without locality. 



A. breuteliana Presl. 



Fourn., Sertum Nic, p. 261 (as A. iticisa Schrad. from Ometepe, and A. 

 filiformis Sw. from Granada); Hemsl., Biol. Cent. Am., vol. in, p. 693, 

 Ometepe and Granada. 



Sub-order IV. POLYPODIACEiE. 



Family I. PTERIDEiE. 

 Genus PTERIS Linn. 

 1. P. biaurita Linn. Plate IV, Figs. 1-6. 



Linn., Sys. Nat., vol. 11, p. 688; Hook, et Grev., pi. cxlii; Hook., Sp. Fil., 

 vol. 11, p. 203; Fourn., Bull. Soc. Bot. Fr., vol. xv, p. 18; Hook, and Bak., 

 Syn. Fil., p. 164; Hemsl., Biol. Cent. Am., vol. in, p. 622. 



P. vemoralh Willd., — Presl, Rel. Haenk., p. 56; Hook, Sp. Fil., vol. n, p. 



202. 

 P.galeotti Fee, — Hook., Sp. Fil., vol. n, p. 204. 

 Campteria biaurita Linn, — Beddome, Ferns S. Ind., pp. 14, 69, pi. xliv; 



Smith, Hist. Fil., p. 293. 

 P . quadriaurita Retz., — Hook., Sp. Fil., vol. n, p. 179, pi. cxxxiv B: Eaton, 



Fil. Wr. et Fend., p. 203; Beddome, Ferns S. Ind., pp. 11, 69, pi. xxxi ; 



Hook, and Bak., Syn. Fil., p. 158; Hemsl., Biol. Cent. Am., vol. in, p. 



625; Bak., Biol. Cent. Am., vol. iv, p. 115. 

 P. edentula Kunze, — Fourn., Sertum Nic, p. 258. 



This widely distributed species presents a variety of forms 

 which have given rise to an extended synonymy. In the Nic- 

 aragua collection three forms appear: 



1. Typical P. biaurita with arching veins connecting the 

 bases of the midribs of the lobes of the pinnte, represented in 

 PI. iv, fig. 1. 



Not rare near the foot of the volcano Ometepe. 



2. Typical P. quadriaurita without the arching veins below 



