296 University Geological Survey of Kansas. 



of five vertebrae which I am inclined to think belong to this 

 genus. They are about the same size as those of I. anaides, 

 but, as there is nothing about them that would characterize 

 them specifically, nothing more can be done with them until 

 more complete specimens are found. 



Ichthyodectes anaides. Plate XLIX, figs. 1-3. 



Ichthyodectes anaides Cope, Proc. Am. Phil. Soc. 1871, pp. 339, 340. 



This species is represented by the remains of several indi- 

 viduals, including the jaws, portions of the vertebral column, 

 and one skull without the jaws, which probably belongs to this 

 form. 



The maxilla is represented in one specimen in a compressed 

 and somewhat fragmentary condition, the posterior extremity 

 being absent. The bone, as a whole, is about the same size as 

 the maxilla of I. cruentus } but is much thinner in cross-section 

 than in this form. The bone is moderately deep at the posterior 

 condyle, which is slightly convex. Back of the condyle the su- 

 perior border presents a sharp ridge which continues for some 

 distance. Just back of the premaxillary surface the alveolar 

 border is slightly concave and then slightly convex. The teeth 

 are small, about 4.5 occurring to the centimeter. 



Maxilla: Depth at posterior condyle 33 mm. 



Thickness back of condyle 10 " 



I am inclined to think that the dentary bone figured by Pro- 

 fessor Hay 57 as that of I. cruentus belongs to this species. The 

 bones are short and deep, with moderately sloping symphyses. 

 There are also two convexities in the alveolar border, the pos- 

 terior of which is not shown in Hay's specimen owing to this 

 extremity of the border being absent. The coronoid process is 

 not prominent, and the border seems to be very steep below and 

 back of it. The teeth are large, directed slightly inward at the 

 apices, and without striae. The lower border is thin and has a 

 number of large foramina just above it. 



Dentary : Length of alveolar border 99 mm. 



Depth of symphysis 41 " 



Depth at coronoid process (estimated) 59 " 



Number of teeth in one centimeter 3 



57. Amer. Jour. Sci., VI, p. 227. 



