205 



DiPH. 



Diphyphyllum arundinaceum. Billings. Collett's Indi- 



\fl\\ 3^ ' ^ef^/fSS^^Lr -fifl^_ ^^^ Report of 1881, page 



' ' '^ '^^ ""^ 389, plate 51, fig. 1. Side 



view of a mass of cora • 

 lites. (Allied: to B^ stra- 

 mineum^ but is larger, 

 Nicholson.)— Corniferous 

 limesto ne in Iowa . — 

 Villa, 



Diphyphyllum 

 breve, 



Hall, 35th Rt. 



Diphyphyllum 

 Cylindraccum, 



Hall, 35th Rt. 



Diphyphyllum 

 tumidulum, 



f 1 .oTTlWi™^^^ 1 r-x Hall, 35th Rt. 



lnciJ88l.^^^, yi, Ol. all Villa. 



Diphyphyllum stamineum. Billings. Collett's Indiana 



Report of 1882, page 261, plate 

 9, fig. 2. — Upper Helderlerg 

 ( Corniferous limestone) forma- 

 tion.^ VIII a., — Several speci- 

 mens of an undetermined 

 species of Diphyphyllum are 

 noted by G. B. Simpson (1888), 

 in Hale & Hall's collections of 

 1875, from near Orbisonia, 

 Hunt. Co., Pa. (00, p. 234) 

 601-30 ; 605-3 ; and a very large 

 specimen, 610-9, from Miller's 

 farm, on Warrior ridge, Burre 

 township in'Huntingdon County 

 by C. E. Billin; all from the 

 lower Helderherg formation., 

 VI 



hicl.ia8;i. 



