1859.] 



DAAVS0N FOSSILS IN COAL. 



275 



long and curved ; and there are traces of numerous accessory pieces 

 which have been attached to their extremities. Only one sacral ver- 

 tebra can be made out, and it has broad lateral apophyses. The pelvis 

 is of large size and remarkable form ; the ilium long and expanded 

 below, the ischium greatly expanded ; the pubis expanded and tri- 

 angular where it joins the ischium, and round and arched toward the 

 symphysis. The femur is thick and nearly straight, the tibia short 

 and stout, the fibula slender, the phalanges broad. The hind limb 

 thus largely developed must have been capable of supporting the 

 whole weight of the body in standing or leaping. The anterior 

 extremities appear to have been comparatively slender, with thin and 

 long fingers. A few scattered vertebras lying posteriorly to the 

 pelvis may, perhaps, be remains of a tail. There was a dermal 

 covering of small ovate bony scales, of which, however, only a few 

 scattered specimens remain (figs. 15, 16). 



This species is evidently quite remote from the ganocephalous and 

 labyrinthodont types of Batrachians, and in many respects approaches 

 to Lacertians. It may perhaps be allied to the Telerpeton of Elgin, 

 but does not appear to resemble any reptile hitherto found in the 

 coal-formation. Three skeletons of this species appear to have been 

 entombed in the erect Sigillaria in question. The most perfect of 



Figs. 19-23. — Hylonomus aciedcntatus from the Coal-measures of 



Nova Scotia. 



Fig. 23. 

 Fig. 19. Fig. 20. 



Fig. 19. Teeth, magn. lf> diam. L'O. Inner tooth, mngn. 16 ilium. •_' 1 , '-'"J. B 



magnified. L'.'5. Phalanges, mugniliid. The nut. length is shewn l>y the 

 straight line. 



these is that represented in Mr. 11. s. Smith'sdrawing, fig. 3, PL 111.* 



The fragment of a jaw in tig. 11 is from ;i second ; mid ti number of 



* Not engraved. 



