564 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 8, 
outer or upper margins of both flanks might reach to the dorsal 
region, covering up and enclosing the ribs, exactly as is the case with 
the specimen before us. The perfect imbrication and close inter- 
locking of the scales would undoubtedly conduce to this end by 
maintaining their compact order. 
This seems to us so natural an explanation of the phenomenon, that 
we gladly adopt it; and thus we find the greatest difficulty of the 
problem turned and conquered. We are also indebted to the libe- 
rality of Prof. Huxley for pointing out to us the affinity of our new 
form to Dasyceps, also a Permian Labyrinthodont. 
The relationship to the latter is seen in the form and ornamenta- 
tion of the head. In Dasyceps the muzzle is not by any means so 
much produced as it is in Lepzdotosaurus ; the form, however, of the 
occipital region presents considerable resemblance. But what is 
most remarkable is that the surface of the skull is covered with 
minute, sharp, tooth-like processes, quite similar to those before de- 
scribed on the muzzle and sides of the skull of our new form. 
The Bradford fossil recently described by Prof. Huxley in the 
Quart. Journ. Geol. Soe. vol. xxv. p. 309, under the name of Pholi- 
derpeton scutigerum, shows some relationship to Lepidotosaurus 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 development, 
peculiar ornamentation, and perfect mode of imbrication, as well as 
the greatly elongated, narrow muzzle, and other characters 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 Duffii, 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. 
EXPLANATION OF PLATE XXXVIII. 
Fig. 1. Slab exhibiting the left side of Lepidotosaurus Duffit, two-thirds natural 
size :—d, a, a’, line of the vertebral column ; a’, the cervical portion of 
ditto ; b, the inferior portion of the skull; ¢, small piece of the upper 
wall of ditto bulged inwards; d, muzzle exhibiting at the sides minute 
conical tooth-iike processes ; ¢, é, €, ribs; f, belt of bony matter, resem- 
bling a fragmentary breast-bone; g, g, anterior mass of bony matter, 
supposed to be the remains of the shoulder-girdle ; , posterior ditto, 
nature undetermined ; 2, z, inside view of the rows of dermal scales ; 
Jj, the dorsal extremities of four or five of ditto; 4, 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 striation of the 
surface ; Z, 1, patches showing the striated impressions of scales. 
Fig. 2. Outline of cranium, dorsal view; one-third natural size. 
Fig. 3. A scute, about the natural size. 
