On new Labyrinthodonts from the Edinburgh Coal-field

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Abstract
1. Note respectlng the Discovery of a new and large Labyrinthodont (Loxomma Allmanni, Huxley ) in the Gilmerton 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 .Rhizodus (Owen), very liberally granted me free access to the large collection of vertebrate fossils from Burdie Holme 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 now in a position to prove that Rhizodus is one of the cyclifcrous Glyptodipterini. But, while looking through the large series of remains from the Gilmerton ironstone in the Edinburgh Museum, most of which are referable to Rhizodus , I came upon two or three specimens of a very different character. The most important and significant of these is the fragment of the Mndcr part of the upper wall of a large cranium (P1. XI. 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 inoscnlating ridges separated by intermediate grooves. The serrated sutures of the bones composing this frag-ment of a skull are, for

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