XXX 
ON NEW LABYRINTHODONTS FROM THE EDINBURGH 
COAL-FIELD. 
Quarterly Journal of the Geological Society of London, vol. xvitt., 1862, 
pp. 291-296. (Read May 7th, 1862.) 
PLATE NI. (PLATE 37]. 
1. Note respecting the Discovery of a new and large Labyrinthodent 
(Loxomma Allmanni, Huxley) in the Gilimerton Ironstone. 
DURING my visit to Edinburgh in January last, my friend Professor 
Allman, becoming aware that I was engaged in collecting materials 
for the study of the genus R/Azzodus (Owen), very liberally granted 
me free access to the large collection of vertebrate fossils from Bur- 
die House and Gilmerton, in the Museum of the University. 
I thus became acquainted, for the first time, with the upper and 
under aspects of the head, and with the indubitable scales of this 
remarkable fish; and, putting the information thus obtained with 
that derived from the study of specimens in many other collections, 
I am nowin a position to prove that RAzzodus is one of the cycliferous 
Glyptodipterini. 
But, while looking through the large series of remains from the 
Gilmerton ironstone in the Edinburgh Museum, most of which are 
referable to RAzzodus, | came upon two or three specimens of a very 
different character. The most important and significant of these is 
the fragment of the hinder part of the upper wall of a large cranium 
(Pl. XI. [Plate 37] fig. 1) presenting its smooth inner, or under, surface 
to the eye. Where the substance of the bone has been broken away, 
however, the impressed surface of the matrix shows that the outer, or 
upper surface was ornamented with strong inosculating ridges sepa- 
rated by intermediate grooves. The serrated sutures of the bones com- 
