397 



Mert. 



usually distorted by pressure. Its remarkably smooth surface 

 usually shows only a few lines of growth ; but in some cases 

 strong ones.— The other figures are taken from OoUett's In- 

 diana Keport of 1881, p. 300, plate 25, fig. 1, back of a small 

 roundish specimen ; f. 2 front of a rhomboidal specimen ; f. 

 3, back of large ovate form also emarginate in front ; shows 

 hole (foramen) in beak; f. 4, front of large spec, strongly 

 emarginate in front ; f. 5, side view of 3 ; f. 6, back of narrow 

 specimen, with slight emargination in front ; f. 7, back of an- 

 other. — Niagara Vb, 



Mertensides buUatus, (Fecopteris hullata, Bunb.) Fon- 

 taine. Older Trias Flora of Virginia, U. S. G. 8. Bull, 6, p. 35, 

 pi. 15, figs. 2, part of compound fertile pinna; 3, last sterile 

 pinna ; 3^, magnified^ pinnule to show nervation ; 4, compound 

 sterile pinna; 5, largest heteromorphous pinnules. (Other 

 figs, on plates 16, 17, 18, 19, omitted.) Specimens in great 

 number and fine preservation. Unlike all later plants except 

 Fecopteris loUfolia, L. and H., Yorkshire Oolite. Fructifica- 

 tion interesting, resembles that of Laccopteris. Abundant in 

 shales and soft sands over the lower coal at Carbon Hill and 

 Clover Hill ; near Midlothian, Deep Run, Ydi.— Trias. 

 Tr/ds 



2 ^ PI IQ 



FiQ./. Pf. J 8. 



