26 FOSSIL PLANTS IX NATIONAL MUSEUM. 



43. Pecopteris uuita Brougu. 



Locality aud collector unknown; one specimen; Museum number, 

 2199 ; lot number, 70. 



44. Pecopteris villosa Brougn. 



Mazon Creek, 111. ; received from the American Museum of Natural 

 History, New York; one specimen; Museum number, 2195; lot number, 

 G8. Oannelton, Pa. ; received from I. C. Russell ; one specimen ; Mu- 

 seum number, 2203 ; lot number, 227. Cannelton, Pa. ; received from 

 I. C. Eussell ; one specimen ; Museum number, 2211, on same stone as 

 number 2210; lot number, 227. Museum number, 2214, on same stone 

 as number 2212 ; lot number, 227. 



45. Pecopteris villosa Brougu., var. microphylla Ls. 



Green County, Pa. ; Benj. Miller, collector ; four specimens ; Museum 

 number, 2196; lot number, 7-1. Two specimens; Museum number, 

 2193 ; lot number, 53. 



Differs by the smooth rachis, the pinnules very small narrow linear- 

 oblong obtuse, free to the base or connate only at the very base, at 

 right angles to the narrow rachis. The pinnae are linear- lanceolate, 

 also at right angles, curved upwards near their extremities ; the pin- 

 nules at base are not more than 1°*™ broad and 3-4™°^ long, deeply villose 

 on the surface. 



46. Pecopteris Pow^ellii, sp. uov. PI. I, fig. 1, 1 a. 

 City of Mexico ; Ellis Clark, collector. 



A small bipinnate fragment : Rachis narrow ; ultimate pinnse oppo- 

 site, open and slightly recurved ; i^innules small, alternate, close, sub- 

 linear, obtuse, connate to above the base, separated by narrow obtuse 

 sinuses ; medial nerve thin, percurrent, the lateral oblique, curved to- 

 ward the borders from the middle, there forking in two or three branches. 



By the form and position of the pinnules, this fern is evidently refer- 

 able to Pecopteris. But its basilar nerves are emerging from the rachis 

 and enter the base of the pinnules vertically or obliquely as in species 

 of Alethoj)teris. 



One specimen ; Museum number, 2202 ; lot number, 56. 



47. Pecopteris spec, fruit of. 



Richmond, Va. ; received from Nat. West; one specimen; Museum 

 number, 2192; lot number, 54. "Pettyshon's R. I. Cala"; G.Thomson, 

 collector. 



48. Pseudopecopteris anceps Lx. 



Cannelton, Pa. ; received from I. C. Russell; one specimen ; Museum 

 number, 2212 ; lot number, 227. 



49. Pseudopecopteris dimorpha Ls. 



Rhode Island ; received from the American Museum of Natural His- 

 tory, New York ; one specimen ; Museum number, 2209 ; lot number, 65- 



