18 PROCEEDINGS OF THE ACADEMY OF 



look backwards. They are separated by a concavity from the 

 diapophysial projections, which is continuous with the anterior 

 surface of the odontoid. 



In a posterior cervical the cup of the centrum is transverse 

 oval, and the neural canal ample and transverse. The parapo- 

 physial articular surfaces are J-shaped, the convexity forwards. 

 The roof of the canal is deeply excavated on the middle line 

 above, and from the fossa thus formed the ridge of the neural 

 spine rises. This ridge is peculiar in the possession of a double 

 row of teeth or serrse separated by pits; on the posterior edge a 

 median series of teeth is most prominent. The edge of the cup 

 is thick, of the ball strongly shouldered, the shoulder obsoletely 

 ridged. 



The first dorsal has a similar transverse articular surface and 

 neural canal, and the serration of the neural spine is strongly 

 marked. The parapophysial articular face is an isosceles spheri- 

 cal triangle with the long angle upwards. 



M. 



Axis and odontoid, length 0.0.">8 



Cervical length (total) 

 Diameter of cup, f vertical 



outside measure, | horizontal 

 Diameter canal, transverse 

 " neural spine at base 



.U42 

 .028 

 .0:31 

 .02 



.018 



The serration of the neural spines constitutes the most striking 

 peculiarity of this crocodile. The use of the structure cannot 

 be surmised, as they were in large part at least concealed by 

 muscles and integument. It is intermediate in size between the 

 T. minor and T. squankensis. 



Presented to the writer by A. J. Smith, the courteous director 

 of the marl pits of the Farmingdale and Freehold Marl Company. 

 They were found in the Eocene marl of Farmingdale. 



1 THECACHAMPSA MINOR, Marsh. 

 Amer. Journ. Sci. Arts, 1870. 



The smallest of our crocodiles, stated b3 r Marsh to belong per- 

 haps to the same genus as the T. squankensis. 



[April 16, 



