NEW LABYEINTHODONT AMPHIBIAN. 231 



Pholiderpeton scutigerum, shows some relationship to Lepidoto- 

 saurus in the large development of the ventral scutes ; but they 

 differ greatly in character from those of the latter. 



The extraordinary characters of the scales, their vast develop- 

 ment, peculiar ornamentation, and perfect mode of imbrication, 

 as well as the greatly elongated, narrow muzzle, and other cha- 

 racters of the head, make it necessary to establish a new genus 

 for the reception of the Midderidge Labyrinthodont, to which, as 

 previously stated, we have given the name of Lepidotosaurus 

 Dujfii, the specific name being in honour of the gentleman who 

 has added so much to our knowledge of the vertebrata of the 

 British Permian rocks. 



We are much indebted to W. C. Stobart, Esq., and J. Duff, 

 Esq., for the pleasure of examining and describing this fossil. 

 The specimens have been obligingly deposited in the Natural 

 History Society's Museum. 



EXPLANATION OF PLATE VI. 



Fig. 1. Slab exhibiting the left side of Lepidotosaurus Duffii, two-thirds 

 natural size : — a, a, a, line of the vertebral column ; a, the cer- 

 vical portion of ditto ; 6, the inferior portion of the skull ; c, 

 small piece of the upper wall of ditto bulged inwards ; d, muzzle 

 exhibiting at the sides minute conical tooth-like processes ; e, e, e, 

 ribs ; /, belt of bony matter, resembling a fragmentary breast- 

 bone ; g, y, anterior mass of bony matter, supposed to be the 

 remains of the shoulder-girdle ; /«, posterior ditto, nature unde- 

 termined ; i, i, inside view of the rows of dermal scales ; /, the 

 dorsal extremities of four or five of ditto ; k, impressions of the 

 anterior or lower extremities of four or five rows of scutes of the 

 right side, showing the ridges and furrows and the minute stria- 

 tion of the surface ; I, I, patches showing the striated impres- 

 sions of scales. 



Fig. 2. Outline of cranium, dorsal view ; one-third natural size. 



Fig. 3. A scute, about the natural size. 



