88 PALAEONTOLOGY OF ILLINOIS. 



VATICINODUS? CARBONARIUS, St. J. and W. 



PL IV. Fig. 20. 



Maxillary posterior teeth below medium size, irregularly oblong or 

 subspatulate in outline, moderately arched from within outwards. 

 Postero-lateral border somewhat rapidly converging from the acutely 

 rounded posterior extremity to the point of inrollment, the narrow 

 enamel fold inbeveled and distinctly defined from the rather widely 

 expanded basal rim, which projects gently downward and outward 

 beyond the coronal limits ; antero-lateral border not preserved ; 

 inner margin apparently broadly and regularly arched, inbeveled 

 inferiorly. Coronal prominence occupying half, perhaps more, of 

 the crown surface, obscurely defined in front from the plane anterior 

 area, gently arched transversely with the wider slope posterior of 

 the low crest. Worn surface minutely and closely punctate. 



The present species is recognized from a single specimen belong- 

 ing to the left ramus of the upper jaw. Unfortunately it is muti- 

 lated, not displaying the character of the antero-lateral border, and 

 the coronal surface is so disfigured by attrition as to obscure the 

 original contour. Its relations, however, seem to be with the teeth 

 arranged under the present generic formula, of which it is an inter- 

 esting recurrence in the uppermost groups of the Carboniferous 

 series. It is, however, possible that it may prove to be generically 

 allied to Stenopterodus. Worn specimens of the corresponding form 

 of the St. Louis species, S. parvulus, would indeed be difficult to 

 distinguish from the present unique example. . 



Geological position and locality : Lower Coal Measures, roof of coal 

 No. 5, of the Illinois general section, Carlinville, Illinois. 



VATICINODUS? LEPIS, St. J. and W. 



PL IV, Fig. 21. 



Posterior tooth of the maxillaries of small size, subrhomboidal in 

 outline. Antero-lateral border very oblique in forward and outward 

 course, making a comparatively slight angle with the inner margin, 

 which is broadly arched to the obtusely rounded posterior angle; 

 postero-lateral border gently arched, converging toward the point of 

 inrollment at an angle of 80, more or less, with the opposite side, 

 and parallel with the forward half of the inner margin, basal por- 



