62 CATALOG OF FOSSIL FISHES IN THE MUSEUM 



E 1954 A small right antero-superognathal which may represent a 

 juvenile individual oi D. magnificus (pi. 27, fig. i). It 

 differs from the juvenile antero-superognathal of D. new- 

 berryi in that the anterior face joins the outer lateral face 

 in a sharp ridge, instead of the two being confluent in a 

 convex plane as in juvenile antero-superognathal of the 

 latter. The fang also is relatively sharper and more 

 pointed. Height, 4 cm. 



E 1958 ' 'Tooth" oi a left antero-superognathal of about the size of 

 D. newberryi (PL 13, fig. 3. By inadvertance this figure 

 is upside down.) 



e. Postero-superognathals 



The following two postero-superognathals are clearly referable 

 to Dinichthys. They are small, but judging by the amount of wear of 

 the functional margin, they both probably represent adult individuals. 

 The inferior margin is in both strongly rounded; and they differ in 

 form from any other postero-superognathals hitherto described. 

 None the less, we hesitate to base a species upon them, since they may 

 belong with some of the other Dinichthys remains for which we have 

 proposed names in the preceding pages. 



E 1943 A small right postero-superognathal, 65 mm. in width (PI. 

 16, figs. I, I a). The inferior margin is more rounded 

 than is usual in Dinichthys postero-superognathals. The 

 functional margin, on the inner face, is beveled by 

 wear. Five denticles are present along the posterior 

 end of the cutting margin, which increase somewhat 

 in size distalward. 



Measuremtnts tnm. 



Greatest width 65 



Total height, including process 50 



Greatest height from cutting margin to line separating 

 lower from upper half 29 



E 2388 A right postero-superognathal of the same species as the 

 preceding but smaller; in matrix, shown in inner view 

 (PL 16, fig. 2). Greatest width, 56 mm.; total height, 

 including process, 36. 



