DOLLO, BELGIAN FOSSIL VERTEBRATES 
107 
5. The genus Mosasaurus has the longest geological range, from the lower 
Senonian to the upper Maestriehtian; Plioplatecarpus survives from 
upper Senonian to lower Maestriehtian; Hainosaurus from lower 
to upper Senonian, and Prognathosaurus is limited to the upper 
Senonian. 
6. In the Maestriehtian two genera of Mosasaurs survive, but the Ichthyo¬ 
saurs and even the Plesiosaurs are wholly extinct. On the other hand 
there were still, on dry land, herbivorous and carnivorous Dinosaurs. 
Bibliography of the Belgian Mosasaurs. 
1. From 1882-1904 see: 
L. Dollo, Bull. Soc. belg. Geol., 1904, xviii, 216. 
2. In 1904: Ibid., pp. 207, 217. 
3. In 1905: Ibid., xix, 125. 
Part II. Tertiary. 
A. Paleocene — Montian. 
Mammals . . . . . X 
Birds.O 
Reptiles. X 
Amphibians.Q 
Fishes. X 
.Neighborhood of Binche (Hainault). 
.Neighborhood of Mons (Hainault). 
Upper Montian. 
1. Coryphodon eoceenus Owen, 1846. Trieu-de-Leval (near Binche). 
2. Trionyx levalensis Dollo, 1909. Trieurde-Leval (near Binche). 
Unpublished. 
Lower Montian. 
1. Fishes. Six species from Ciply (near Mons) and from Mons. 
M. Leriche, Mem. Mus. roy Hist. nat. Belg., 1902, II, No. 1. 
B. Lower Eocene — Heersian. 
Montian 
1 . 
2. 
3. 
4. 
5. 
? Upper 
T ,owpr 
1. Mammals 
2. Birds . 
3. Reptiles 
o 
o 
x 
