continues along one side of the widening anterior face to the base 

 of the crown. The posterior cutting edge is nearly straight, while 

 the anterior is rather abrubtty curved at the apex. 



The anterior and posterior edges are not lateral in position as 

 in Aublysodon lateralis. 



Measurements. m. 



No. 1. No. 2. 



Length of crown 025 .014 



Diameter at base {anteroposterior . . . .012 .006 



(transverse 0135 .008 



A large species. Discovered by Jno. C. Isaac. 

 Laelaps explanatus, sp. nov. 



An abundant species, but as yet represented only by teeth which 

 are about the size of those of the largest of living Varanidse. 



The crowns are strongly compressed and curved; one side is 

 flat, the other gently convex; the posterior cutting edge is median 

 and concave. The anterior edge is not continued to the base of 

 the crown, and disappears before attaining the apex; it is feebly 

 denticulate, and only at its convex curvature towards the apex ; 

 its course is median. The flat face has a slight bevel to the pos- 

 terior edge. Surface smooth, without transverse undulations. 



Measurements. m. 



Length of crown . . 0110 



Diameter crown at base {anteroposterior . . . .0066 

 'transverse 0028 



Lselaps falculus, sp. nov. 



Represented by several teeth of about half the size of those of 

 the last described reptile. They differ in form in several respects, 

 being relatively shorter and stouter, and less sectorial in character. 

 The lateral surfaces are about equally convex, while the anterior 

 face is narrowly obtuse, and without cutting edge. The posterior 

 edge is concave and furnished with a serration of smaller denticles 

 than in the L. ex-planatus ; it is median in position. 



Measurements. m. 



Length of crown 0090 



~ . . - , e ( anteroposterior . . . .0056 



Diameter of base of crown 1 l 



t transverse 0040 



Found by Jno. C. Isaac. 



