280 Reports and Proceedings — 



that there exists in Soleure a bed (No. 8 of the section), in which, 

 are found together species belonging to the zone of Am. tenuilobatus, 

 and many others belonging to the " Astartien " proper ; and that 

 consequently the zone of Am. tenuilobatus is a facies of the " Astar- 

 tien " or upper " Sequanien." W. H. H. 



ISEI^OiaTS JL.1SJ-JD :PI?,OGSE]DIlsrC3-S. 



Geological Society oe London. 

 L— March 22, 1882.— J. W. Hulke, Esq., F.E.S., President, in 

 the Chair. — The following communications were read : — 



1. "On a Fossil Species of Camptoceras, a Freshwater Mollusc, 

 from the Eocene of Sheerness." By Lieut.-Colonel H. H. Godwin- 

 Austen, F.E.S., F.G.S. 



In this paper the author described a new species of fossil mollusc 

 from the upper part of the London Clay, near Sheerness, where it 

 was discovered by Mr. W. H. Shrubsole. He referred it to the 

 genus Camptoceras, Benson, a recent fresh-water type, hitherto 

 known only from three species found in widely separated localities 

 in India by different naturalists. The genus has a sinistrorse shell, 

 with disunited whorls ; and the species, which the author named 

 Cam-ptoceras priscum, is elongate, with the apex very acuminate and 

 slightly curved, and consists of four whorls rather rapidly increasing 

 and constricted at intervals, then becoming tumid. The surface 

 shows slight indications of spiral ribbing in the casts. The aperture 

 is not distinctly shown, but was evidently oblique, circular or oblate, 

 and slightly reflected. The length of the shell was about a quarter 

 of an inch. Numerous specimens were obtained in a single fragment 

 of clay. 



2. " Note on the Os Pubis and Ischium of Ornithopsis eucamerotus 

 (synonyms — Eucamerotus, Hulke; Bothriospondylus (in part), R. 

 Owen ; CJiondrosteatosaurus, E. Owen)." By J. W. Hulke, Esq., 

 F.E.S., Pres.G.S. 



In this paper the author reviewed the various contributions to the 

 knowledge of this Dinosaur, for which he adopted Prof. Seeley's 

 generic name Ornithopsis, and employed the name eucamerotus, origi- 

 nally applied by him to the genus as the specific name. He also 

 discussed the affinities existing between Ornithopsis and certain other 

 Dinosaurs, such as Ceteosaurus and the American genera Camara- 

 savrus, Atlantosaurus, and Brontosaurus. He then described the 

 pubis and ischium which have recently been acquired by the British 

 Museum from the collection of the late Eev. W. Fox, by whom they 

 were purchased, together with the finest typical thoracic vertebrae of 

 Ornithopsis. The pubis was described as an oblong, flattened, nearly 

 straight bar, about 11 inches wide in the middle and broader at the 

 two ends, with an oval foramen in the acetabular dilaliation of the 

 proximal part, which unites by a straight suture with the anterior 

 dilatation of the ischium ; the latter is narrower, stouter, and more 

 curved than the pubis. The length of the pubis is about 29 inches, 

 and that of the ischium about 26 inches. At the proximal end of 



