324 proceedings of the geological society. [feb. 1, 



February 1, 1860. 



Thomas Pease, Esq., Westbury, Gloucestershire, was elected a 

 Fellow. 



The following communications were read : — 



1. On some Fossils from the Grey Chalk near Guildford. 

 By R. Godwin-Austen, Esq., F.R.S. F.G.S. 



[This paper was withdrawn by permission of the Council.] 

 (Abstract.) 



In the cast of the body-chamber of a large Nautilus elegans, from 

 the Grey Chalk of the Surrey Hills, near Guildford, the author 

 found (the specimen having been broken up by frost) some lumps 

 of iron-pyrites, and numerous specimens of Aporrhais Parhinsoni, 

 with fragments of Turrilites tuberculatum, Ammonites Coupei, A. 

 varians, and Inoceramus concentricus. These species are either rare 

 in the Grey Chalk or not known to the author as occurring in this 

 bed ; and he believes that the specimens referred to were accumu- 

 lated in the shell of the Nautilus (possibly by the animal having 

 taken them as a meal shortly before death) at a different zone of 

 sea-depth to that in which the Nautilus and its contents sank and 

 became fossilized. Mr. Godwin- Austen referred to these specimens 

 as being indicative of the contemporary formation of different 

 deposits with their peculiar fossils, at different sea-zones ; of the 

 transport of the inhabitants of one zone to the deposits of another ; 

 and as a possible explanation of the abundance of small angular 

 fragments of Mollusks, Echinoderms and Crustaceans in the midst 

 of the very finest Cretaceous sediment. 



2. On some Cretaceous Rocks in the South-Eastern Portion of 

 Jamaica. By L. Barrett, Esq., F.G.S., Director of the West 

 Indian Geological Survey. 



Below the thick Tertiary deposits in Jamaica are found thin beds of 

 fossiliferous Emestone, underlaid by igneous rocks. These strata 

 form the subject of the following communication. 



The newest bed of the fossiliferous limestones is exposed on the 

 north side of the Plantain-garden River, three miles west of Bath. 

 This section shows a bed of compact limestone, 8 feet thick, resting 

 on a thick bed of conglomerate, and overlaid by shale. 



The shale is of a dark colour and without organic remains. The 

 limestone is compact and grey, with thin veins of calc-spar ; it con- 

 tains numerous fossils, all of them characteristic of Cretaceous or 

 other Secondary strata, viz. Inoceramus, Hippurites, and Nerincea. 



The conglomerate is composed of rounded pebbles of igneous 

 rocks and a white fossiliferous limestone ; it is succeeded by a great 

 thickness of unfossiliferous black shale. 



