82 PSEUDOCERATITES OF THE CRETACEOUS. 
at base of living chamber is 120 mm.; breadth of side at this line 67 mm., to 
the shoulder: umbilicus (no shell present) 8 mm. Greatest transverse 
diameter, 23 mm., is along the median line in the same plane; no shell 
present. 
Locality: Fox Hills, South Dakota. 
Age: Fox Hills group. 
SPHENODISCUS KONINCKI 0. sp. Hyatt. 
Pl. XII, fig. 8. 
This is a cast in fragmentary condition with one side abraded, but the 
right side in excellent condition. ‘The whole diameter was about 150 mm. 
The side is smooth near the umbilical shoulder and has the usual obsoles- 
cent folds on the outer part of the lateral zone. The suture figured shows 
the very large siphonal saddle. While the other saddles and lobes are 
similar to those of S. lenticularis, they are not identical. There are six 
divided saddles on the right side. ‘Those of the left side were obliterated. 
Locality: Near Maestricht. 
Age: Senonian. 
SPHENODISCUS BINCKHORSTI Bohm. 
Ammonites pedernalis Binckhorst, 1873, Mon. Gast. et Céph. du Limbourg, pl. 5a’, 
fig. 2 and 5d, fig. 1 (no others). 
Sphenodiscus binckhorsti Bohm, 1898, Zeitschr. Deutsch. geol Gesell., Vol. L, p. 197. 
This species from Limbourg as figured by Binckhorst is a close ally of 
our American S. pleurisepta, but has only one line of nodes, with costee arising 
from these and radiating outwardly; apparently there is no outer line of 
nodes. It is said to have been compared with Roemer’s originals. This 
leads one to think that these must include more than one species. 
SPHENODISCUS UBAGSHI Grossouvre. 
Sphenodiscus ubagshi Grossouvre, 1893, Ammonites Craie supérieure, p. 141, pl. 9, 
fig. 4-6. 
This French species is more like our S. lobatus than any other species, 
but the principal lateral saddles have less lobate phylliform outlines. The 
sutures have the small first lateral saddles common in this genus and five 
divided saddles. 
Age: Upper Campanian (uppermost Cretaceous). 
