128 REFERENCES TO THE PLATES. 
PLATE Vite 
Figs. 1, 2. Humerus of Mosasaurus, one-half the diameter of nature, from near Columbus, 
Mississippi, belonging to the collection of Dr. Wm. Spillman. 
Fig. 1. Posterior view. 
Fig. 2. Anterior view. a, Head of the bone; 6, greater tuberosity; c, lesser tuberosity ; d, strong 
impression of muscular attachment. Length of the original specimen “about ten inches. 
Figs. 8, 4, 5. Proximal extremity of a huge bone, supposed to be of a humerus of the Mosasaurus, 
a little less than one-third the diameter of nature. The original measures eleven inches in length 
from the summit of the greater tuberosity to the broken end of the shaft. From the Green-sand of 
Burlington County, New Jersey. 
Fig. 3. Posterior view. 
Fig. 4. Anterior view. 
Fig. 5. Outer or posterior border view. a, The head of the bone; b, greater tuberosity ; ¢, lesser 
tuberosity ; d, impression of muscular attachment. 
Fig. 6. An isolated bone, probably a radius of a small species of Mosasaurus, or of a young animal, 
half the size of nature. Belonging to Prof. James Hall, and obtained by Messrs. Meek and Hayden, 
from a Cretaceous deposit of Nebraska. Length of the original specimen about two inches and 
three-quarters. 
Fig. 7. Supposed radius of Mosasaurus, one-half the diameter of nature, belonging to the same 
skeleton and collection as the humerus above indicated, from Columbus, Mississippi. Length of the 
specimen two inches. 
Fig. 8. Supposed carpal bone of Mosasaurus, the size of nature. From formation, No. 4, on the 
Big Cheyenne River; an isolated specimen, discovered by Dr. F. V. Hayden. 
Fig. 9. Reptile bone, undetermined, one-half the size of nature. The specimen belongs to Prof. 
James Hall, and was found by Messrs. Meek and Hayden, five miles below Daurion’s Hill Nebraska, 
among loose fragments at the base of a Cretaceous bluff. 
Fig. 10. Reptile bone, undetermined, half the size of nature, found in company with that of 
Fig. 8. Length one inch and three-quarters. 
Fig. 11. Basi-sphenoid bone of Mosasawrus, one-third the diameter of nature, from Holmdale, 
Monmouth County, New Jersey, belonging to the collection of Prof. George H. Cook. Length of 
original eight inches, breadth at the posterior diverging processes six inches. a, Anterior; b, pos- 
terior processes articulating with the basi-occipital bone. 
Fig. 12. Dermal plate of a Gavial, from Burlington County, New Jersey, belonging to the collee- 
tion of the Burlington Lyceum. One-half the natural size. 
Fig. 13. Supposed pubic bone of Hadrosaurus Foulkii, one-fourth the diameter of the original 
specimen. 
PLAT EYEX 
All the figures are of the natural size. 
Fig. 1-11. Mosasaurus. 
Fig. 1. Inner view of an alveolar fragment, apparently from the upper jaw, from Burlington 
County, New Jersey. a, A nearly entire tooth, exhibiting on the inner side of the crown the 
subdivisional planes; b, exserted portion of the fang, which is coossified with its alveolus and exca- 
vated into a large cavity for a successor; c, bottom of the cavity, exposed by the loss of a thin plate 
of bone belonging to the alveolus; d, orifice of the cavity at the margin of the jaw postero-internally 
to the fang of the functional tooth ; e, portion of the alveolus in front; /, exserted portion of the fang 
of a tooth, the crown of which is broken off; g, bottom of the fang exposed by the breaking away of a 
thin portion of the jaw-bone; the sides of the fang are firmly coossified with the alveolus; h, orifice 
of the cavity for a successional tooth; 7, thin shell of bone remaining from the fang of a tooth, and 
closely coossified with the sides of the alveolus. 
