10 TIIOR ACOSAURUS. 



Two isolated teeth, obtained by Dr. Burtt from the same formation as the pre^ 

 cedino- specimens, exhibit identical characters with those above described. 



Tlic 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 arc 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. Dc 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 VincenttoAvn 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. II. Haines, J. P. Smith, T. McEucn, 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 contamed in the fragment of jaw pre- 

 sented by Dr. Burtt. 



Of five specimens, consisting of cro\vns 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 portio'n of the left maxilla, and possesses the 

 same size and form as the corresponding portion of the jaw of the Vincentto\vn 

 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 or Alligator, for which he proposed the name of Crocodilus 

 hasifisfnifi} 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 



' Journ. Geol. Soc. Lornlon, Y, 381, pi. x, figs. 1, 2. 



