76 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



described by the authors mentioned. The following are the 

 species : 



PTERIDOPHYTA 

 Order Filicales 



Pecopteris bullata Bunbury, Quart. Jour. Geo!. Soc. London, 

 3: 281. pi. II. f. I, la, lb, ic. 1847 



Mertensides bullatus (Bunbury) Fontaine, Mon. U. S. Geol. 

 Surv. 6: 35. pi. 15. f. 2-5; pL 16. f. 1-3; pi. 17. /. /, 2; pi. 18. f. i, 2; 

 pi. 19. f. I. 1883. 



This species is by far the most numerous of the forms in the 

 collection. It is well preserved and there is no doubt as to its 

 being identical with that recorded by Newberry from Sonora, 

 Mexico. The specimens show both sterile and fertile fronds. 

 Fontaine considers Bunbury's species as belonging to his genus 

 Mertensides but as the specimen in hand agrees perfectly with 

 that figured by Bunbury and by Newberry, while its agreement 

 with the genus Mertensides does not seem to be so close, the name 

 used by Bunbury is here retained. 



Asterocarpus falcatus (Emmons) Fontaine; Ward, Twentieth 

 Ann. Rep. U. S. Geol. Surv. 2: 237. pi. 22. j. j. 1900 



Pecopteris falcatus Emmons, Geol. Rep. Midland Counties, 

 ^.C. s27.pl. 4. f.g. 1856. 



Though well characterized only a single pinnule represents this 

 species. 



Asterocarpus virginiensis Fontaine, Mon. U. S. Geol. Surv. 



6:41. pi. 19. f. 2-3; pi. 20. f. I, 3; pi. 21. f. I, 2; pi. 22. 



f. I, 3; pi. 23. f. 1-4; pi. 24. f. I, 2. 1883 



This species is well represented in the collection. Though the 

 finer nervation is not so well preserved as one might wish, the 

 outline and the coarser nervation leave little to be desired. 



AIacrotaeniopteris sp.? 



This is a very fragmentary specimen, and for this reason it is 

 not considered advisable to attempt to identify it specifically. 

 It is, ho\ve\er, closely related to Macrotaeniopteris magnifolia 



