200 Geological Society. 



Brussels Xatural-History Museum, tlie author described some fossils 

 obtained by him in 1870 from a bed between the red and purple 

 clays and the flint gravel capping the clift' in Brook Bay. The 

 ilium, when complete, was not less than 124 centim. long, with 

 a maximum vertical extent of 33 ccutim. The dorsal border is 

 stout, and sliglitly overhangs the outer surface. The prseacetubular 

 process is relatively short ; and the postacctabular part of the bone 

 tapers more than in Mautcll's hjuanodon. The femur, when entire, 

 could not have been less than lU8 centim. long : the girth of the 

 condyles is 82 centim., and their breadth 32 centim. : the tibia is 

 shorter than the femur. Botli metatarsi demonstrate the existence 

 of but three functional toes ; the middle metatarsal is the longest, 

 attaining 35-5 centim., the outer metatarsal 2U centim., and the 

 inner 2(3 centim.; the inner toe has three phalanges, the middle 

 four, and the outer toe five. The toes of the Iguanodon therefore 

 correspond to the second, third, and fourth toes of Hypsilopliodon. 

 The ungual phalanx of the inner toe is 17 centim. long, that of the 

 middle toe nearly 18 centim. long, and that of the outer toe about 

 lo"5 centim. long. 



The humerus is about 10 centim. long. Its proximal end has a 

 well-developed posterior or inner process, and a large deltoid 

 crest. The caudal vertebra?, three probably between the 4th and 

 the 10th in this series, have very four-sided articular surfaces sug- 

 gestively like those hitlierto referred to FeJorosaurus. The chevron 

 bones are very stout and long. The differences in their ilia show 

 this and Mantell's Iguanodon to be specifically distinct ; and with 

 this new If/uanodon the author connected the name of C. Seely, Esq., 

 M.P., of Brook House, in recognition of his courteous permission 

 to excavate the cliff" for the recovery of the fossils, naming it 

 Ijjuanodon Seeli/i. 



2. " On a peculiar Bod of Angular Drift on the high Lower- 

 Chalk Plain between Didcot and Chilton." By Prof. J. Prestwich, 

 M.A.. F.Pt.8., F.G.S. 



In making a railway from the main line to Chilton, this bed of 

 drift was cut through for a distance of about 1^^ mile. It lies on a 

 flat plain extending from the foot of the escarpment of Upper Chalk 

 to the top of that of Lower Chalk. In places it is full 28 feet tliick. 

 At first a fine chalk rubble, it becomes after a while coarse, and is 

 divided by clay-beds into an upper and a lower deposit. Here small 

 boulders and bones occur, the latter much shattered ; but Eleplias 

 primitiemus, Rhinoceros tichorliinus (?), Bison priscus, Cervus taran- 

 dus, Kqnus, &c. have been identified. The boulders are Sarsen-stone ; 

 and there are small fragments of flint. Shells of Fk^^ci nuxn/inafa, 

 Heli.v Jiispida, and II. pulchella have been found. The drift (which 

 is widely spread) is from 150 to 260 feet above the Thames ; at 

 highest 407 feet above the sea. The author compares it to the 

 rubble-beds overlying the raised beaches of ISangatte and Biighton. 

 It is rinconnected with any river-course, is not of marine origin, and 

 its materials, where not local, are derived from the southward. 



