JfOTES OX LOXOMMA ALLMAKXT. 49 



distinct, whilst on the right side are seen six or seven slender 

 flattened ribs, the lower ends of which appear to be perfect, and 

 are attenuated and pointed, their upper or proximal ends being 

 rather abruptly expanded and conspicuously hollowed into as 

 many cup-like articular cavities. They lie obliquely, their dis- 

 tal ends diverging somewhat from the line of the spine. The 

 uppermost of these ribs is much broader and stronger than those 

 below, which become more and more slender to the lowest. They 

 are from four to six inches in length, and aj)pear to have been 

 free or "floating" ribs, and the articulation of the last marks 

 the lower end of the thorax, but perhaps this Labyrinthodont 

 had abdominal vertebral ribs. 



Lying at the right side of the lower part of the lumbar region 

 is a fragment of a flattened bone, which appears to have been ar- 

 ticulated with the vertebral column, and may have formed part 

 of the pel\T.c girdle : near the vertebrse it is rather narrow, but 

 widens out a good deal, and the distal end is wanting. 



The fragment ISTo. 3 consists of eight caudal vertebra ; at its 

 left side is seen one distinct, small, rounded, facet for the articu- 

 lation of some small, lateral bone. The right side of this frag- 

 ment has been broken off, on the other are traces of transverse 

 processes. 



On the first dorsal there is imbedded a tooth of Loxomma, and 

 there is also one scute of the same associated with the vertebrae. 



The length of the body of this specimen of Loxomma appears 

 to have been four feet eight inches, not counting the head, neck, 

 or tail. AVe know that the length of an ordinary head of Lox- 

 omma is thirteen to fourteen inches, and of Anthracosaurus nine- 

 teen inches. The neck was probably not long though strong; 

 the tail was of unascertained length. Probably it may not be 

 very wide of the truth if we assume the total length of this speci- 

 men to have been between ten and eleven feet. From the size 

 and strength of its chest it had evidently been a breather of aii\ 



From the number, form, size, and strength of the vertebrae 

 and their processes, and of the ribs, and therefore of the chest, 

 from the occurrence with these remains of a tooth and scute of 

 Loxomma, and further, from a comparison of these bones with 



E 



