890 MESSRS. HANCOCK AND ATTHEY 



surfaces of the teeth, however, are in a very good state : some 

 exhibit grooves, others ridges. In one of the teeth the grooves 

 are very delicate, and are precisely like those in Mr. Ward's 

 specimen. 



Besides the above evidence of the occurrence of Anthracosaurus 

 in the Newcastle Coal-field, detached teeth are likewise found 

 at Newsham, agreeing in every particular, externally and inter- 

 nally, with the type specimens. They are rare, however, in 

 comparison with those of Loxomma, which is undoubtedly the 

 much commoner fossil of the two. 



Loxomma Allmanni, Huxley. 



Since our paper appeared in the "Annals" (May, 1870) on 

 the occurrence at Newsham of an imperfect cranium of Loxomma 

 Allmanni, Mr. Atthey has obtained from the same locality ano- 

 ther and complete cranium of this fine Labyrinthodont. This 

 second example was procured about the middle of last June, 

 and is one of the finest and most perfect specimens that hava 

 yet been found. Indeed, so far as we know, there are but two 

 others that can at all be compared with it ; and these are the 

 beautiful skulls alluded to in the above paper as being in the 

 possession of Mr. James Thomson, of Glasgow. 



Our second specimen is fourteen inches long and nearly seven 

 inches and three-quarters wide across the occipital region, where 

 the skull is widest. We estimated the length of the first ob- 

 tained specimen, which wants the muzzle, at twelve inches ; 

 but, as it is nine inches wide, this estimate is probably consi- 

 derably less than it ought to be. Since we have seen that the 

 one which is only seven inches and three-quarters wide is four- 

 teen inches long, we should certainly expect that the specimen 

 measuring nine inches across would be proportionately longer. 

 The latter could scarcely have been less, when perfect, than fif- 

 teen or sixteen inches in length. 



The specimen recently obtained has been entirely removed 

 from the matrix, so that both the upper and under surfaces of 

 the skull are completely exposed to view. The bone is in a very 



