'Wright and Huxley— Fossil Reptiles from Ireland. 169 



curved horn-like processes, which have determined the name of 

 the genus. There appear to have been not more than twenty- 

 vertebrae, all provided with strong curved ribs, between the head 

 and the commencement of the caudal region ; and, probably, there 

 were about as many in the tail. 



All the vertebrae have long, but not high, lamellar neural spines, 

 the length of which is hardly increased in the caudal region, where 

 the chevron bones take a form corresponding with that of the 

 neural spines, and like them are fimbriated or. grooved at their free 

 edges. 



The tail is thus, in principle, similar to that of TJrocordylus, but 

 differs widely in its details. 



The hinder limbs, somewhat larger than the anterior, have five 

 long and slender digits, and an unossified carpus, as in the recent 

 Proteidea. The fore limb had certainly four and probably, five, 

 similar digits. 



The ventral surface of the thorax was provided with the sculp- 

 tured bony plates, characteristic of the Labyrinthodonts, and between 

 these and the pelvis is a dermal armour, composed of minute granular 

 ossicles, and apparently in some parts of broader plates. 



This genus was first brought to Prof. Huxley's notice by his 

 friend and colleague, Prof. Jukes, who forwarded to him a drawing 

 of a specimen obtained by Mr. Galvan, of the Irish Survey. 



Prof. Jukes' letter is dated Nov. 8th, 1865, and contains the 

 information that Mr. Baily says "it is not unlike the things 

 figured in PI. 7 and 10 of Dunker and Meyer, vol. vii. These 

 however are called Andrias Tschudii, and come from the Brown Coal." 

 It does not appear that Mr. Baily ever gave a more definite opinion 

 than this as to the nature of these remains. 



Prof. Huxley returned the sketch, with the information that the 

 animal represented was certainly a new Labyrinthodont Amphibian, 

 and named it Keraterpeton Galvani. 



5. Lepterpeton. This new form is readily distinguished from all the 

 others by its slender body, its elongated head, and especially by 

 the prolongation of the symphysial part of the mandible, some- 

 what approaching what occurs in the Ichthyosauria, and certain 

 Grocodilia. 



The body and head are shorter than the tail, and the hind limbs, 

 which have remarkably long digits, are twice as long as the fore 

 hmbs. There seem to be about eighteen vertebree, with hour-glass 

 shaped centra, in the dorso-lumbar region. The largest complete 

 specimen of this genus is six inches long ; but some fragments 

 indicate that it attained greater dimensions. 



We name the species Lepterpeton Dohbsii, after Mr. K. Dobbs, the 

 agent of the property. 



6. AntJiracosaurus. The sixth genus is represented by a specimen 

 containing the posterior half of the skeleton of an animal, probably 

 not less than seven feet long, and displaying caudal and dorsal ver- 

 tebrae, many ribs, the relatively small hind limbs, and part of the 

 pelvis. From the character of the vertebrae and ribs we are greatly 



