680 Pteridophyten. 



It has however little in common with this species and is more 

 nearly allied to P. grisebachü Underw. P. skaferi (PI. 13 B) from 

 Cuba, its nearest ally is P. müchellae Baker, it is however not 

 difificult to disting-uish these two species. P. müchellae is illustraled 

 on Fl. 14. P. rosenstockit from Brazil, originally distributed as P. 

 pendulum Swartz., It can scarcely be regarded as a near relative 

 of this plant and is allied rather to P. curvatum Swartz. 



4. Note upon Pellaea arsenii Christ. This plant, described from 

 a Single collection, is a common one in Mexico. In earlier collec- 

 tions specimens were distributed as Cheilanthes microphylla Swartz. 

 and as Pellaea seemanni Hook. The writer gives the distribution 

 in Mexico, all the specimens being in the U. S. National Her- 

 barium. 



5. A new Psilogramme from Porto Rico P. portoricensis (PI. 

 15). It differs widely from the other members of the small group 

 to which it belongs. This group of Psilogramme is characterized 

 by having several veinlets to each ultimate segment and veins 

 which do not reach the margins, 



6. A new species of Hemitelia, section Cnemidaria , from 

 Panama. H. rudis (PI. 16). In the venation of the largest pinnae 

 it Shows some approach to H. grandis. It is more nearly related 

 to H. subglabra. 



7. The North American species of Hemitelia, section Euhemi- 

 telia, p. 414 — 420. There are nine representatives of this section in 

 North America. H. elliottii (Baker) Underw. MS. [Alsophila 

 elliotüi Baker) with description, known only from the mountains of 

 Grenada. H. sessilifolia Jenman (PL 17), known only from Wil- 

 son's coUections from Jamal ca. H. wilsoni Hook. (PI. 18) from 

 mountains of Jamale a and Porto Rico. H. sheyntign Jenman, 

 from which as far as now one Single plant has been found in Port 

 Royal Mountains, Jamal ca. It is illustrated on PI. 19. H. calolepis 

 Hook. (PI. 20) known only from Cuba (Coli. Wright). H. costavi- 

 censis (Klotzsch) Mett. (PI. 21) with sjmonymy and several notes on 

 habitat and Variation. It is known from Vera Cruz to Panama. 

 H. escuquensis Karsten from Venezuela and Porto Rico. H. 

 mtiltißora (J. E. Smith) R. Br. with füll synonymy and notes on 

 illustrations, distribution (Guatemala to Panama), nomenclature, 

 Variation in venation, position of sori and shape of Segments. H. 

 muricata (Willd.) Fee (PI. 22), with synonymy, new description, 

 based on new specimens from Guadeloupe and Martinique 

 notes on nomenclature and synonymy. The specimen is apparenth'^' 

 confined to Guadeloupe and Martinique. 



8. Two new species of Marattia from Panama, p. 421, 422. 

 M. chiricana, apparently somewhat similar to M. interposita and M. 

 pittieri. Of this species only one Single plant with but one frond 

 has been found. It shows an undoubted affinity with M. kaulfussi, 

 but differs greatly in several characters. 



9. Notes on Lycopodium, p. 422 — 425. Some notes on specimens 

 belonging to L. dichotomum. ]diC<\. and L. 7C'//so;»V Underw. et Lloyd. 

 L. affine Hook, et Grev. must be renamed on account of L. afßne 

 Bory from Bourbon. It is named now L. hlepharodes Maxon nom. 

 nov. It occurs in the mountains of Ecuador and Venezuela. 

 Costa Rican specimens have been erroneously referred to this spe- 

 cies and are regarded now as a new species L. hoffmanni. The 

 differences between the two species are given. Another new species 

 is L. regnelli Maxon (PI. 23), from Brazil. It is a member of the 



