Reports and Proceedings. 371 



Fossils, by Mr. F. B. Meek, and the Triassic and Cretaceous Fossils, 

 by Mr. W. M. Gabb. 



Cretaceous rocks occur over a very extensive area on tbe Pacific 

 Coast, and are rich in fossils at many localities. 



Jurassic fossils have been discovered in Genessee Valley, and in 

 the auriferous slates of Mariposa County, 



Eocks of Triassic age, equivalent to the Alpine Trias, or the beds 

 of Hallstadt or St. Cassian, occur over a vast area, and form an im- 

 portant part of the metalliferous belt of the Pacific Coast ; the best 

 preserved fossils have been obtained from the Nevada district. 



Besides the two reports just alluded two, we have just received 

 the first part of the second volume of Palseontology, by Mr. W. M. 

 Gabb. It contains descriptions of all the Tertiary Invertebrate 

 Fossils as yet discovered, the imperfect sta'te of preservation of a 

 large portion of them has rendered it difficult to work them out 

 satisfactorily. These fossils have been provisionally referred to the 

 Miocene, Pliocene, and Post-Pliocene divisions of the Tertiaries, in 

 accordance with our present ideas of their general relations, and the 

 relative number of living and extinct species in each group of strata. 



H. B. W. 



:E^EI30I^TS j^h^hd i=E,ooEsiDiT?rc3-s. 



Geological Society of London. — Jime 20, 1866. — Warington 

 W. Smyth, Esq., M.A., F.E.S., President, in the Chair. The follow- 

 ing communications were read : — 



1. ^'On the Structure of the Bed Crag." By S. V. Wood, Esq., F.G.S. 

 The Eev. 0. Fisher having lately published a j^aper in which he 



endeavoured to show that the Chillesford beds were beneath the 

 Fluvio-marine Crag, Mr. S. Y. Wood in this paper first drew atten- 

 tion to certain facts which appeared to him to prove the contrary 

 view, especially the relations of the deposits as exhibited in pits at 

 Wangford and at Thorpe, near Aldborough. The author then drew 

 attention to the character of the fossils of the Eed Crag as affording 

 evidence of one of the most rapid changes m fauna that Geology 

 affords ; and he showed that this deposit contains the evidence of a 

 transition by stages, from the oldest, where the affinities of the 

 fossils are to a great extent with those of the Coralline Crag, and to 

 a greater extent with the existing fauna of the Mediterranean, to the 

 newer stages, in which the shells are very few, and confined to types 

 peculiarly northern. 



2. "Note on supposed Eemains of the Crag on the North Downs, 

 near Folkestone." By H. W. Bristow, Esq., F.E.S., F.G.S. 



An examination of these sands at Paddlesworth had convinced the 

 author of their similarity to certain ferruginous clayey sands, with 

 masses of ferruginous grit, which occur in the Hampshire Basin, 

 and belong to the Woolwich and Beading series ; and he therefore 



