10 THORACOSAURUS: 
Two isolated teeth, obtained by Dr. Burtt from the same formation as the pre; 
ceding specimens, exhibit identical characters with those above described. 
The crowns of. two additional teeth from the Green-sand, near Blackwoodtown, 
Camden County, N. J., presented by Dr. Burtt to the Academy, probably belong to 
the same species as the foregoing. ‘They are narrower in proportion to their length 
than those in the fragment of jaw, but may have occupied a more anterior position 
in the series. 
The successional tooth, alluded to in the jaw fragment described by Dr. De Kay, 
resembles the larger of the two just indicated. 
The summits unworn of two successional teeth, seen protruding from within the 
fangs of broken functional teeth, in the Vincenttown skull, in the corrugated appear- 
ance of their enamel and in other characters, are identical with those of the teeth 
described. 
The cabinet of the Academy also contains several small fragments of jaws, with 
entire teeth, from the Cretaceous limestone of Big Timber Creek, Gloucester Co., 
N. J., presented by Messrs. R. Haines, J. P. Smith, T. McEuen, and S. G. Morton. 
The teeth, of which the most perfect is represented in Fig. 6, Plate I, correspond 
in size, form, and proportions, with those contained in the fragment of jaw pre- 
sented by Dr. Burtt. 
Of five specimens, consisting of crowns of teeth, and probably referable to the 
same species as the preceding, from the Green-sand of Burlington County, N. J., 
presented to the Academy by Lewis T. Germain, the more perfect are represented in 
Figs. 3 and 5, Plate I. One of these corresponds in its proportions with the teeth in 
Dr. Burtt’s fossil, and in the fragments from Big Timber Creek. The other is 
much longer in relation with its diameter, and probably belonged to the anterior 
part of the jaw. 
Accompanying the teeth, presented by Mr. Germain, there is a mutilated speci- 
men of a posterior caudal vertebra, the body of which is a little over three inches 
in length, and is eleven lines in transverse diameter at its middle. 
Of other fossils referable to the extinct Gavial of New Jersey, contained in the 
cabinet of the Academy, there is a coherent mass of much mutilated bone fragments, 
obtained from the Green-sand, and presented by Daniel Brinton. ‘The fragments 
are exceedingly friable, and are cemented together by a portion of the Green-sand 
matrix. One of them consists of a portion of the left maxilla, and possesses the 
same size and form as the corresponding portion of the jaw of the Vincenttown 
skull just in advance of the palatine foramen. The outer part of the alveoli is 
destroyed and all traces of the teeth have disappeared. The best preserved of the 
fragments consists of the greater part of a fourth or fifth cervical vertebra, repre- 
sented in Figs. 5, 6, Plate III. It is identical in character with the vertebra from 
the New Jersey Green-sand, described and figured by Prof. Owen, as indicating a 
species of Crocodile er Alligator, for which he proposed the name of Crocedilus 
basifissus.1 The specific term was given in consequence of the cleft condition of the 
process or hypapophysis beneath the fore part of the vertebral body. The cervical 
t Journ. Geol. Soc. London, V, 381, pl. x, figs. 1, 2. 
