173 



Cycl. 



Cyclonema sub-angulatum. {Pleurotomaria sul-angu- 

 lata, Hall, Trans. Alb. Inst. Vol. 4, 1856. Whitfield 

 Bull. 3, Am. Mus. N. IL, 1882, plate 8.) Collett's 

 Indiana Rt. of 1882, page 364, plate 31, fig. 32.— 

 Sub-carloniferous limestone of Spergen Hill, etc.^ 

 Ind. This species of Cyclonema can be distinguished 

 from all the other species of the genus, by the flat- 

 fish, shelf-like upper part of each whorl, with a sharply 

 angular edge. This is the distinguishing feature of the casts 

 of the shell. No striae parallel to the lines of growth have been 

 observed. There are traces of finer striae between the coarser 

 revolving striae, which latter are unequal in size and distance 

 from each other. Compare (7. yvanii, Leville. (Hall.) — XI. 

 Cyclopteris digitata. Europe. Near Whittleseya elegans. 

 — Note. The first specimen of Cyclopteris leaf attached to the 

 leaf stem (rachis) recorded, may be seen in A. C. Seward's fine 

 lithograph page-plate X, facing page 344, of the London Geolo- 

 gical Magazine for August, 1888, No. 290.— X/77. 



Cyclopteris elegans. (Lesquereux. Boston Jour. Soc. 



KlO 



7 ^-^ 



Nat. Hist. Vol. 6, page 416. Geol. 

 of Penn. 1858, page 856, plate 5, fig. 4, afterwards identified by 

 Lesq. with NeurojAeris tenuifolia of Brongniart, described in 

 Coal Flora (Report P), page 100. Grand'Eury and Saporta 

 are inclined to place it and other species in a new genus 

 Doleropteris ; see Coal Flora page 522.) Collett's Indiana Rt. 

 of 1883, page 52, plate 10, fig. 7, where it is made identical with 

 Neuropteris loschii. — P'ound by Lesquereux in the Darlington 

 hed at Cannelton, Beaver Co., Pa. XIII, 



Cyclopteris flmbriata. See Neuropteris fimb. XIII 

 Cyclopteris germari. See Neurpoteris germari. XIII 

 Cyclopteris laciniata. See Neuropteris laciniata. XIII 

 Cyclopteris undans. See Neuropteris dentata. XIII 



