93 



Blot. 



Blo-hrophyllum promissum. (Hall's 35th An. Rt. 1882. 



Foss. Corals, Niagara and TJ. 

 Helderherg.) CoUett's Indiana 

 Rt. of 1882, page 304, plate 28, 

 fig 6, the axis of a specimen from 

 which the skin or bark of the coral 

 has been removed, showing the 

 unsheathed (invaginated) char- 

 acter of the walls; fig. 7, a sec- 

 tion, length wis'i, of another one; 

 plate 27, fig. 9, a cup. Falls of 

 the Ohio. Corniferous limestone, 

 VIII a. — This is one of the four 

 new species by Hall, of Billings' 

 genus Blothrophyllum, and is 

 here given as an illustration of 

 the genus, no species of which 

 has thus far been recognized in 

 Pennsylvania. The four species 

 described and figured in Hall's 

 35th report, on pages 448, 449, 

 are — B. miilticalicatuin^ from 

 Canada west; — B. papulosum^ 

 from Leroy, N. Y. ; — B. sinuo- 

 Hum^ Irom the Falls of the Ohio; 

 and — B, promissum^ which has 

 70 lamellae ; and a flat area at the 

 bottom of the cup, which dis- 

 tinguishes it from B. smnosum^ 

 which also has from 60 to 70 la- 

 mella3. B. papidosum has from 

 90 to 100 lamellae, and a flat space 

 at the bottom of the calyx. B, 

 multipUcatuTn has as many as 

 120 lamelhe. 



Bornia ? in coarse white sandstone; Ware farm, War- 

 ren Co., Pa. Carll's collections, O, p. 130, specimen 2930. — 

 IJl^ Jl. 



Bornia Pin loose piece of reddish sandstone, Pleasant- 



ville, Venango Co., Pa., Carll's collections. 



