202 PROCEEDINGS OF THE ACADEMY OP 



any of the teeth in the dentary bone above described. The crown is eight lines 

 long and four and a quarter in diameter at base. The fore and back part of 

 the robust osseous fang present concavities, as portions of cavities remaining 

 after the shedding of teeth with absorption of their fangs. 



Of two shed crowns in the museum, from the same locality, one is 5j lines 

 long by 2^ and If in diameter at base ; the other 6| lines long by 3| and 3^ 

 at base. 



The museum of the Academy also contains two specimens consisting of 

 alveolar fragments of jaws with teeth, of the same animal, from Burlington 

 Co., N. J. They were presented by W. J. Taylor, and are reputed to have been 

 obtained from the green sand. 



One of the specimens is 2 J inches long, and contains an alternation of teeth 

 and empty cavities for successional teeth. The first cavity is large, the fang 

 formerly occupying its position being completely absorbed. The second tooth 

 of the specimen is entire. Its crown is 7 lines long by 4 and 3^ at base. The 

 third and fifth cavities for successional teeth are not quite so large as the first, 

 nor are the fangs which occupied them so completely absorbed. The fourth 

 tooth has its crown mutilated. Its base behind is irregularly excavated, but 

 whether by erosion, or whether it is the remains of a position occupied by a 

 successional tooth, I cannot determine. In the sixth tooth the crown is not 

 entirely protruded, and its fang is already coossified with a tubular sheath of 

 the fang of the former tooth which occupied its position. In the seventh tooth 

 the crown is shed, but the fang remains with a large cavity. The crown of 

 the eighth tooth was also shed and the fang nearly obliterated through ab- 

 sorption. 



The smaller alveolar fragment is IJ inches long, and contains two teeth, 

 with an intervening cavity for a successional tooth. Before aud behind the 

 two teeth are the remains of other cavities. 



Though I have an aversion to change names, yet the name Conosavrus is so 

 obviously wrong and liable to mislead, especially also as there is a saurian 

 named C'oniosaurus, that I propose for the former the name of Conosaurops. 



I may here take occasion to mention that I have suspected that the tooth 

 represented in figs. 7, 8, 9, pi. xx, of my " Cretaceous Reptiles of the United 

 States," and referred to a carnivorous reptile with the name of Tomodon, may 

 also have been a fish. The base of the specimen presents an irregular porous 

 condition, but this I suspect rather to be the result of erosion. As it is unique, 

 I have not been able to obtain a section to examine its microscopic structure. 

 As the name TomodonhixA been previously appropriated by Dum^ril for a genus 

 of serpents, I would propose to alter the name applied to the animal to which 

 the fossil belonged, to that of Diplo'i;(|modon. 



August ISth. 

 The President, Dr. Hays, in the Chair. 

 Sixteen members present. 



August 25 th. 

 The President, Dr. Hays, in the Chair. 



Twenty-three members present. 



Messrs. Uselraa Smith and B. Waterhouse Hawkins were elected 

 members. 



Mr. Ralph Tate, of London, was elected a correspondent. 



On favorable report of the Committee^ the following paper was 

 ordered to be printed : 



[August, 



