Ol DESCRIPTIONS OF FOSSIL PLANTS. 



Thereis no leaflet attached to rachis in the specimens from Alaska, only 

 separate ones, the largest IP 1 " long, 2 CI " broad; some much shorter 

 and narrower with the nerves thick, US'" 1 in width, or as many as marked 

 in Heei's figure. The base of the large leaflet is more narrowed and 

 rounded, the oblique point of attachment being only 5 to 8""" while it is 

 P"' in ileer's figure. 



Three specimens; Museum number, 2540. 

 Zamites alaskana, n. sp. Plate x, fig. 4. 



Fragment of a leaflet, obcordate or emarginate at the point of attach) 

 men t, slightly enlarging upward to the middle where it is destroyed, 

 and there 22""" broad at 4"" distance from the base. At the point 0} 



attachment, 5 ' broad only and semilunar, it is marked with three 



slightly distinct undulations. The nerves are very thin, parallel, a little 

 less than 1'"'" distant or six in 5 mm of width. Its affinities are distant)! 

 marked with Jurassic species. (Zamites distractus Sap., Jurassic FL; M 

 Benevieri ileer, Fl. Foss. Helv., iv, PL lii.) 



One specimen ; Museum number, 2G22. 

 Pecopteris denticulata Heer. 



One specimen; Museum number, 252G. 

 Aspidium Oerstedi Heer. 



Arct. Fl., vi, J). 30, PI. xxxiv, fig. 3, is represented by many specimens,, 

 some with large pinnae and pinnules near the base < f the fronds, others^ 

 with narrow long strict pinna*, and pinnules similar to those of the upper: 

 part of the fronds. 



Fourteen specimens; Museum number, 2434. 

 Asplenium Dicksonianum Heer. 



One specimen; Museum number, 2435. 

 Asplenium Foersteri Deb. & Ett. 



One specimen; Museum number, 253G. 

 Pinus ! staratschini Heer. 



One specimen; Museum number, 2533. 

 Chondrites filiciformis, n. sp. Plate xvi, fig. 1. 



Frond cartilagiueous or coriaceous by compression, shining on the 

 surface; primary branches straight, linear; secondary divisions sparse, 

 diverging nearly at right angles, subpinnately ramose in oblique or' 

 horizontal, short obtusely trilobate or long flexuous branchlets bearing 

 irregular round or obtuse squamose lobes at their base or at their ex- 

 tremities. 



The stone has some fragments of primary linear branches, one of 

 them only bearing divisions, the first at right angles, nearly as thick as 

 the primary stem with oblique or nearly horizontal subdivisions either 

 short obscurely trilobate, or longer once lobate at base and bitrilobate 

 at apex. 



