Geological Society of London. 331 



portion is less thickened, and tlie foramen is placed behind the 

 middle of the humeral border, far away from the scapular margin, 

 near which it is situated in the present bone. From the coracoid 

 of Jguanodon it diifers by the absence of the notch between the 

 humeral and scapular surfaces, which there represents the foramen 

 in this bone. In some respects it resembles certain American types, 

 such as Morosaurus, and especially Camptonotus. 



3. " On the Newer Pliocene Period in England." By S. V. Wood, 

 Esq., F.G.S. (Concluding Part.) 



In this part the author continued, from the first part of the paper 

 published in the Journal of the Society for 1880, his examination of 

 the conditions which accompanied the emergence of England during 

 the retreat of the ice of the Chalky Clay, and described the damming- 

 up of the valleys which drain to the Wash by that ice after the 

 water-partings between their systems and those of the Severn and 

 Thames had emerged, whereby the fresh water in these valleys was 

 raised, so as to overflow the minor water-partings within their 

 systems and cover them with gravel, such as that atCasewick, within 

 the Welland system (described by Prof. Morris in vol. ix. of the 

 Journal), and those of Cambridgeshire, described by Mr. Jukes- 

 Browne. He thus referred the freshwater bed at Casewick, covered 

 by this gravel, and the palaeolithic brick-earth of Brandon and 

 Mildenhall (which is overlain as well as underlain by the Chalky 

 Clay) to the time immediately antecedent to this — the slight advance 

 of the ice which thus blocked up and raised the water-line within 

 the systems of the Welland, Nen, Ouse, and Cam having overridden 

 this brick-earth and covered it with the Chalky Clay. 



He then described the gravel (/of his figures) of the Thames 

 valley, and showed that it was the continuation of the gravel previ- 

 ously described by him as synchronous with the Chalky Clay, and 

 which, as described by him in the first part of his paper, was over- 

 lain, and also underlain by that clay, it inosculating with those 

 gravels, up the valleys of the Lea and (Middlesex) Colne. 



He then described the Cyrena-fluminalis formation, which he 

 showed as originating in a depression which raised the water-line in 

 the Thames valley at Grays and Crayford to about 100 feet above 

 the present sea-level, and proportionately higher on the west of 

 London ; and described the formation as consisting, at Grays, of four 

 divisions, which in their upward order he called 1, 2, 3, and 4, — 

 No. 1 being the gi-avel base. No. 2 mostly brick-earth with freshwater 

 shells. No. 3 yellow sand containing freshwater shells in the lower 

 part, but unfossiliferous and false-bedded in the upper, and No. 4, 

 a clay or loam, also unfossiliferous. 



These, he showed, are mutually transgressive, both at Grays and 

 at Clacton, No. 3 at Clacton becoming estuarine by the intermixture 

 of marine shells with the Gijrena, and No. 4, a loamy gravel which is 

 xmfossiliferous ; while, from its greater transgression. No. 4 spreads 

 so widely over the gravel /, that remnants of it occur at Slough, 

 West Drayton, and other places. He then traced the formation 

 northwards in Suffolk, where, from the Cyrena not beiug associated 



