230 EXPLANATION OF PLATE. 



Ctenodus cr (status forms one of the illustrations of Messrs. Hancock 

 and Atthey's series of papers on the Fishes and Labyrinthodonts 

 of the Northumberland Coal-field." Now the illustration here 

 referred to is not a restoration of the palate of C. cristatus, 

 Agassiz, but of that of C. tuberculatus, nobis. Secondly, he 

 states that we describe the upper surface of the tooth of C. cris- 

 tatus as convex, whereas in reality we state that it is " somewhat 

 hollowed or concave." Our paper noticed by Mr. Miall was 

 published in the Nat. Hist. Trans, of Northumberland and Dur- 

 ham, Yol. III., p. 61, the illustration referred to in Vol. IV., 

 PI. XIV. 



EXPLANATION OF PLATE V. 



Fig. 1. Outside view of right mandible of Ctenodus obliqnus, nat. size. 



Fig. 2. Right mandible, seen from above : a, articular piece ; d, dental 

 plate; s, symphysis of jaw. 



Fig. 3. Left pterygopalatine bone, with dental plate attached, of Ctenodus 

 obliquus, nat. size : a, anterior end ; pt, pterygoid border ; p, pala- 

 tine border ; s, symphysis ; sp, rough surface for articulation with 

 the sphenoid bone. 



Fig. 4. Vomerine tooth of Ctenodus, nat. size : a, front, b, side, c, back 

 view. 



