SELLARDS: NEW GENUS OF FERNS. 189 



Lomatopteris jurensls Sell., as that species is figured by Sa- 

 porta, Plantes jurassiques, vol. I, p. 405, pi. 55, figs, 1-4, or 

 Lomatopteris cirinica Sap., 1. c, p. 409, pi. 52, figs. 1, 2. He 

 also mentions Cijcadopteris as developed in the Triassic as de- 

 serving comparison. Judging from the photograph alone, Doc- 

 tor White is inclined to think G. sterlingi close to G. spkndens, 

 and suggests the possible occurrence of intermediate forms. 

 The peculiar shape of the pinnules of the former species, men- 

 tioned in the description — pinnules enlarged above the base, then 

 sloping at first abruptly, afterward very gradually, to a slender 

 apex, the auricle cut off from the pinnule by a distinct lobe — 

 seems to be a character constant for this species and separating 

 it from the other. No intermediate forms have yet been found 

 justifying a closer comparison between the two species. 



