green: ENCHODUS in KANSAS MUSEUM. 105 



This character is not to be found on any of its other specimens. 

 It is probably only a variation. The fringe of fine teeth on 

 the external alveolar border of the dentary is present. The 

 small size is shown by the following measurements : ^^_^ 



Estimated length of the skull 50 



Length of the mandible 38 



Greatest depth of the mandible 10 



Length of the palatine fang 7 



Length of the dentary fang 6 



Specimen No. 823, represented by figure 2, plate XV, fur- 

 nishes only one valuable character, the shape of the ventral 

 end of the preopercular. The dorsal end is broken off. The 

 other two bones are of no value. ^^ 



Greatest width of the preopercular 9 



Figure 3, plate XV, shows a complete dentary. The speci- 

 men number is 824. The ventral border is quite different from 

 that of figure 1, being less prominent. Measurements are as 

 follows : 



Greatest depth 7 



Length of dentary fang 3 



Length of alveolar border 27 



Figure 4, plate XV, specimen No. 321, shows the dentary 

 described by Stewart as Enchodus parvus. (Stewart, 1900, 

 p. 192.) The mesial aspect is shown. By removing the chaik 

 from the other side the external row of fine teeth was dis- 

 closed. 



Length of the alveolar border 25 



Length of the dentary fang 2.5 



Figure 5, plate XV, is a mesial view of another fragmentary 

 dentary, having a crooked fang. The specimen number is 825. 

 The shape of the fang is probably due to compression. The 

 external row of fine teeth is well shown on the caudal half of 

 the tooth border, but they have been broken off on the cephalic 

 half. Only the fang and one other of the large teeth are 

 present. The fang is strongly grooved mesially. The fine 

 teeth are unusually long. ^,^ 



Length of tooth border (estimated) 39 



Length of dentary fang 7 



Length of the fine teeth 1-5 



Figure 6, plate XV, represents a specimen. No. 826, which 



