EEMAINS OF REPTILES AND FISHES. 77 



margin of the rib. The tuberculum is reflected a little, so as to 

 interrupt the convexity of the opposite margin. In short, this 

 rib, as far as can be determined, agrees very closely with that 

 of Anthracosaurus as figured and described by Prof. Huxley (Joe. 

 cit. p. 63). In another specimen the proximal extremity is bet- 

 ter preserved ; and in it the head and tubercle are quite in ac- 

 cordance with the above description. 



Another rib, which probably belongs to this or to some other 

 equally large Labyrinthodont, differs considerably from those 

 just described. It is not quite four inches long, and near to 

 the proximal end it is upwards of half-an-inch wide ; the sides 

 are flattened from before backwards, and exhibit a wide shal- 

 low groove from one end to the other. The tuberculum is 

 scarcely distinguishable from the capitulum, except by its pro- 

 jecting boldly outward from the convex margin of the rib ; its 

 articular surface is continuous with that of the capitulum, form- 

 ing with it a wide diagonal termination. Thence the rib tapers 

 rather rapidly to the distal extremity, which is a little recurved. 



Two or three limb bones have likewise been found, which, 

 from their size, probably belong to this species. One of these, 

 apparently a femur, is IJ inches in length and fths of an inch 

 wide at the middle of the shaft, which is much compressed from 

 front to back, and is a little arched in the same direction ; there 

 is a longitudinal depression extending from end to end. The 

 extremities are much expanded, and they both appear to have 

 double articular surfaces ; that which is assumed to be the distal 

 extremity is more expanded on one side than on the other. 



From the shortness of this bone it would seem that the limbs 

 of this animal were but feebly developed in comparison with the 

 size of the body. 



In concluding this description of the remains of this fine large 

 Labyrinthodont reptile, a few words may be desirable on its re- 

 lationship with the generic forms previously known. It has been 

 already stated that it is closely allied to Loxomma, with which it 

 agrees in having large and probably oblique eyes, placed near 

 together, and in a backward position. It agi*ees pretty well, 

 too, with it in the general form of that assemblage of bones 



