883 



Rhyn. 



Rhynchonella allegania, H. S. Williams. Bulletin No. 



41, U. S. Geol. Sur. 1887, page 87, plate 4, fig. 1, dorsal view of 

 interior impression; 2, side view of same ; 3, gutta percha cast 

 of ventral valve; 4, dorsal interior of another specimen; 5, 

 side of same; 6, ventral interior impression ; 7, showing delti- 

 dium, beak and foramen, gutta percha cast ; 8, impression, 

 somewhat distorted, of inside of ventral valve. All from 

 Sub- Olean ^{Ferruginous sandstone) conglomerate formation 

 (top of PoGono)^,2ii Little Genesee, Allegany Co., N. Y. X, 



Rhynchonella altilis. (Atrypa altilis^RM, Pal. N. \ ., 

 KcL..^. L jSk. jsm^^ d vmrtv Vol. 1, 1847, Chazy.) 



Emmons, A. Geol. I, ii, 

 1855, 192, plate 3, fig. 

 '3.30; the ventral beak 

 curved over the other ; about 24 equal folds, 8 of them in the 

 middle groove. Galciferous upper ^ and Chazy. II a^ b. 



Rhynchonella altiplicatr., Hall. Pal. N. Y. Vol. 3, 1859, 



plate ^^^^^\ r \di^f ^^W^ ^11^ Wmi;^; 



page 231, plate 33, selected figs. 2 a, J, <?, d^ e^ a small individ- 

 ual ;'/, ^, A, i. a larger one; k. enlarged surface. Lower Hel- 

 derherg. — In Huntingdon Co., Pa., four fragments were got by 

 C. E. Hall, in the^field back of the sand quarry near Kock Hill 



