Geological Society. 267' 



Annularia, probably^, longifolia, Brongn., abundant in the British 

 Coal-measures, and found both on the Continent and in North 

 America. 



December 1, 1880.— Robert Etheridge, Esq., F.R.S., 

 President, in the Chair. 



The following communication was read : — 



" On Remains of a small Lizard from the Neocomian Eocks 

 of Comen, near Trieste, preserved in the Geological Museum of 

 the University of Vienna." By Prof. H. G. Seeley, F.E.S., E.G.S. 



The author mentioned that Prof. Kornhuber had described, under 

 the name of Hydrosaurus lesinensis, the remains of a Lizard from 

 the Neocomian rocks of the island of Lesina, off the coast of Dal- 

 matia. The University Museum at Vienna contains a slab from a 

 neighbouring locality, showing the hinder part of the skeleton of ano- 

 ther Lizard, which had been lent to the author for the purpose of 

 description by Prof. Siiss. The specimen includes twelve dorsal and 

 sixty-five caudal vertebrae ; but the tail is incomplete. The sacral 

 vertebrae are concealed, and the pelvis is imperfectly seen. Both 

 hind limbs are fairly well preserved. The author described the 

 distinctions which he considered to separate this animal from Korn- 

 huber's species, consisting chiefly in the form and proportion of the 

 dorsal vertebrae, which, instead of having the neural spine high and 

 square as in Hydrosaurus, have it depressed and produced both 

 anteriorly and posteriorly — in the length and slendemess of the 

 ilium ; in the single-headed character of the ribs — and in the form 

 and structure of the segments of the limbs, which appear to possess 

 four tarsal and three metatarsal bones and five digits. The author 

 proposed to name this Lizard Adriosaurus Suessii. 



December 15, 1880.— J. W. Hulke, Esq., RR.S.,V.P.G.S., 

 in the Chair, 



The following communication was read: — 



" On a new Species of Trigonia from the Purbeck Beds of the 

 Vale of Wardour." By B. Etheridge, Esq., E.R.S., President. With 

 a Note on the Stratigraphical Position of the Fossil, by the Rev. W. 

 R. Andrews. 



In this paper the author described a species of Trigonia discovered 

 by the Rev. W. R. Andrews in the " Cinder-bed " of the Middle 

 Purbeck series in the Vale of Wardour. The specimens were found 

 in the railway-cutting oue mile west of Dinton station. The shell 

 was referred to d'Orbigny's section " Glabrae" of the genus Trigonia, 

 and named Trigonia densinoda. In its ornamentation it closely 

 resembles T. tenuitexta. Lye, of the Portland Oolite, but is more 

 depressed and lengthened posteriorly, and destitute of the ante- 

 carinal space which occurs in all known Jurassic " Glabrae." The 

 escutcheon is remarkably large, and possesses transverse rugae, 

 as in the Neocomian " Quadratae." The author regarded the species 



