PLATE 39 



Rhynchodus ornalus, n. sp. 



Figs. I, la, 2. Cotypes. Two left lower dental plates, posteriorly incomplete, 

 p. 117. 



1, outer view, natural size. E 1950. 



la, the same enlarged about if times, to show ornamentation of longi- 

 tudinal lines. 



2, outer view, natural size. E 1950 a. It shows the entire cutting margin, 

 which is imperfect in Cotype i. Note same style ornamentation as in 

 Cotype I, near lower margin. 



Figs. 3, 3a. Anterior portion of a dental plate, ornamented on both outer and 

 innerfaces with a few pronounced, smooth tubercles. Naturalsize. E 1947a, p. 118. 



3, outer view. (The beak is toward the right.) Note 3 or 4 large, low 

 tubercles. 



3a, inner view. Note the beveled cutting margin, and 2 or 3 low, smooth 

 tubercles. 



Figs. 4, 4a. Dental plate, showing a few low, smooth protuberances or tubercles. 

 Natural size. E 1947, p. 118. 



4, outer view; 4a, inner. (The anterior cusp is not a beak; it has a 

 specious appearance due to a part of the cutting margin being broken 

 away.) 



276 



