244 PHOCEEDINGS OF THE GEOLOGICAL SOCIETY. [Apr. 2, 



of the limb -bones sustain the reference of the genus to the order 

 Ganocephala. 



After careful scrutiny of all the specimens confided to my inspec- 

 tion by Dr. Dawson, I have not met with decisive evidence of a 

 member of any of the orders of Beptilia represented by species of 

 the Oolitic or later series of deposits. Some, as (e. g.) Baphetes, may 

 be Labyrinthodont, but the rest are Ganocephalous ; and Baphetes 

 may possibly belong to this lower group of palseozoic air-breathing 

 Yertebrates. 



DESCEIPTION OF THE PLATES. 

 Plate IX. 



Fig. 1. Hylonomus Lyelli, dorsal vertebra, three times magnified: side view. 

 Fig. 2. , dorsal vertebra, three times magnified : transverse 



section. 

 Fig. 3. , one of the longer ribs, twice nat, size; the end showing 



the hollow. 



Fig. 4. , metapodial and phalangial bones, twice nat. size. 



Fig. 5. , upper maxillary and part of orbit, twice nat. size. 



Fig. 6. Part of upper maxillary and teeth of Hylonomus aciedentatus. 



Fig. 7«. Impression and remains of the dentary bone of the lower jaw of Hylo- 



nomtis aciedentatus, and of a scute, three times magnified. 

 Fig. 8. Part of the dentary bone of a young, or small kind of Hylonomus, three 



times magnified. 

 Fig. 9. The anterior end of a jaw-bone of Hylonomus, twice nat. size. 

 Fig. 10. Bones of the fore limb of Hylonomus, three times magnified. 

 Fig. 11. Bones of a foot of Hylonomus Wymanni, twice nat. size. 

 Fig. 12. Series of (caudal ?) vertebrae of Hylonomus Wymanni, twice nat. size 

 Fig. 13. E-ib (a) and two scutes {h and c) of Hylonomus, twice nat. size. 

 Fig. 14. Eight dentary part of lower jaw of Hylonomus Lyelli, twice nat. size. 

 Fig. 15. Part of the upper jaw and teeth of a Hylonomus, three times magnified. 

 Fig. 16. Parts of upper and lower jaws of Hylerj^eton Dawsoni, nat. size. 

 Fig. 17. Small part of jaw oi Hylerpeton, showing the mode of implantation of 



the teeth ; twice nat. size. 

 Fig. 18. A group of the scutes of Hylerpeton (?) ; twice magnified, 



Plate X. 



Figs. 1 & 2. Dermal scutes and markings of the skin oi Hylonomus^ 



Fig. 3. Portion of the frontal and contiguous cranial bones of a Hylonomus, twice 



nat. size. 

 Fig. 4. Part of the lower jaw of apparently the same species of Hylonomus. 

 Fig. 5 a. Inner surface of upper part of the skull of Bendrerjpeton Acadianum, 



nat. size. 5 h, magnified section of base of tooth. 

 Fig. 6. Outer sm^face of supertemporal bone of Dendrerpeton Acadianum, twice 



nat. size. 

 Fig. 7. Ilium and parts of pubis and ischium of Bendrerpeton Acadianum. 



3. On the Occxiiieence of Mesozoic and Peemian Faitnje in Easteen 

 Atjstealia. By the Rev. W. B. Claeke, F.G.S. 



Since I forwarded my remarks on the " Relative Positions of certain 

 Plants in the Coal-bearing Beds of Australia," which were published 

 in the Quarterly Journal, vol. xvii. pp. 354-362, I have received, 

 from a friend who is engaged, under my direction, in exploring the 



