Geological Hociety. 199 



The following is a list of the genera and species described in the 

 paper : — 



Ctenacanthu^ pJicatiUs, C. duhius, C. la'vis, G. pasfulafus, C. tahcrcu- 

 latus, Compsacatitlmscarinatus, Cosmacanthus marglnatus, C, carinatus, 

 Lispacanthus retrogradas, Cladacanthas paradoxus, C. major, Gna- 

 thacanthus triangularis, Gladodus polgodon, O. curvus, C. destructor, 

 Carcliaropsis Cold, Copodus cornutus, 0. farcatus, C. spatulatus, 

 C. minimus, Lobodus prototijpus, L. i^lanus, Mesogornphus lingua, 

 Pleiirafjomphus auricxdatus, Rhgmodus transversus, R. ohlongus, Cha- 

 racodus angulatus, C. luneatus, Pinacodus gonoplax, P. gelasi, Dimg~ 

 leus Woodi, Mglax batoides, Mglacodus quadratics, M. Sesarma, 

 Homalodus trapeziformis, H. quadratus, Petalodus quadratus, P. re- 

 curvus, P. inequilate rails, Poh/rJdzodus magnus, P. Colei, P. elongaius, 

 P. siniiosu^, P. attenuatus, P. co)istrictus, Chomatodus linearis, C. 

 acutus, Glossodus marglnatus, Harpacodas dentatus, H. clavatus, 

 Streblodus oblongus, S. Colei, S. Egertoni, Deltodus sublcevls, D. ex~ 

 pansus, D. nohllis, DeltoptijGhius acutus, D. gibberulus, Sandalodus 

 Morrisii, Psephodus magnus, Pcecllodus Jonesll, P.glbbosus, Tomodus 

 convexus, Xystrodus striatus, X. angustus, X. Egertoni, Helodus 

 crassus, H. temiis, H. clavatus, H. dllatatus, Id. acutus, H. rich- 

 mondensls, H. triangularis, H. blconvs, H. expansus, Rhampliodus 

 dispar, Petalorhynclius psittacinus, Pristodus falcatus. 



2. " On an extinct Chelonian llcptile {Notochelys costata, Owen) 

 from Australia." I3y Prof. Owen, C.B., F.R.S., F.G.S. 



The fossil reptilian remains hitherto transmitted to the author from 

 Australia have been limited to parts of the skeleton of Megalanla 

 prlsca, Ow. The present specimen, sent last year by Prof. Livcrsedge, 

 is the first fossil Chelonian. The specimen was found in a forma- 

 tion at Blinder's Kiver, Queensland, of which the nature and age 

 are not stated. It is, however, petrified. The fossil consists of the 

 anterior portion of the carapace and of the plastron, brought into 

 unnaturally close contact by posthumous pressure. A minute descrip- 

 tion of the several parts was given, from which the author concluded 

 that though the characters of the carapace might be interpreted as 

 identifying the Chelonian with a true turtle {Chelone), those of the 

 plastron show the well-marked distinctions of Trionyx and Chcdys. 

 On the whole, however, the modifications, especially of the carapace, 

 show a nearer affinity to the marine turtles (Chelone) than the 

 known Chelydrians exhibit, and indicate a more generalized type. 



February 8, 1882.— R. Etheridge, Esq., F.ll.S., 

 President, in the Chair. 



The following communications were read : — 



1. "Description of some Iguanodon Remains discovered at Brook, 

 Isle of AViijht, indicating a new Species, Iguanodon Seelyi." By 

 J. W. Hvdke, Esq., F.R.S. 



After referring to the Iguanodon remains preserved in the 



