REMAINS OF REPTILES' AND FISHES. 67 



iargest and most important of which are the posterior and upper 

 portions of two crania that are undoubtedly Labyrinthodont. 

 These are apparently closely related to Loxormna Allmanni de- 

 scribed by Prof. Huxley in the Proc. G-eol. Soc, Vol. XVIII., 

 p. 291 (1862), though apparently generically distinct from that 

 form. Two sets of sternal plates have also been found in the 

 same locality, as well as several ribs, a few vertebras, two of 

 which have the neural arch complete and most of the processes 

 attached. Several premaxillaries and three or four portions of 

 mandibular bones, with the teeth attached, have also occurred. 

 All these most probably belong to the same large Labyrintho- 

 dont Amphibian. 



Besides the above interesting remains, an almost entire indi- 

 vidual of a new species of Opliiclerpeton, Huxley, has occurred, 

 as well as several other fragmentary reptilian fossils. And what 

 we now propose is, to give in the following pages more or less 

 detailed descriptions of all these, and likewise of some j&sh re- 

 mains that have been found in the same locality. 



Pteroplax cornuta, nobis. 



The two cranial fragments of the reptile designated as above 

 are each composed of the two quadrate supra-occiptals, the two 

 parietals, portions of the elongated frontals, the post-frontals, 

 and the epiotic bones, all of which are firmly united into one 

 great pyriform shield by well-knit serrated sutures, which can be 

 traced with sufficient accuracy. This shield corresponds very 

 well in form to the central portion of the fragmentary skull 

 figured in the paper already referred to, by Prof. Huxley ; but 

 in the new form it is less angulated. The frontals, too, appear 

 to be longer, though their anterior extremities are broken away ; 

 the post-frontals are arcuated in the same manner, but not to the 

 same degree, forming the inner posterior boundary of the large 

 orbits, and their connexions with the parietals and frontals are 

 similar. The parietals widen backwards ; and the foramen, 

 which is situated in the line of the median suture, where there 

 is an elongated eminence, is a little behind their centre, and is 



