548 J. W. Ehves — London Clay at Southampton. 



ments of the maxilla as well as detaclied upper molars of a smaller 

 form, with a brachydont instead of a hypsodont structure ; being in 

 fact intermediate in structure between the teeth of H. bovinus and 

 Antliracotherium. These teeth agree so closely with those of H. 

 porcinus, that thej' may be pretty safely refen'ed to that species. 

 There also occur brachydont lower molars agreeing so well with the 

 upper teeth that they too may be referred to the same species. 



The teeth of this form are so exactly intermediate between the 

 hypsodont species of Hyopotamus and Antliracotherium, that they fully 

 confirm the conclusion I have arrived at elsewhere ^ as to the com- 

 plete passage in dental characters from one genus to another. It 

 may, however, still be convenient to retain the former genus. 



Anthracothekium, sp. (cf. A. minus, Cuvier^), 

 Several lower molars and a fragment of a mandible from Hemp- 

 stead indicate a brachydont anthracotheroid of larger size than the 

 last species, which may probably be referred to the type genus ; and 

 not improbably to Cuvier's A. minus. 



Anthracotherixjm, sp. (cf. A. alsaticum, Cuvier^). 

 A third, upper incisor (No. 29907) agrees exactly in form with 

 the corresponding tooth of the typical form of A. magnum, but is 

 somewhat smaller. It agrees so closely in size with the corresponding 

 tooth of A. alsaticum that it may very probably indicate the exist- 

 ence of that species in the Hempstead beds ; and in any case it 

 seems to indicate a fifth member of the present family from that 

 group, since it appears too large to have belonged to the same species 

 as the lower molars last mentioned. 



The occurrence in the Hempstead beds of the same species of 

 Hyopotamus as in the Konzon beds supports the view of Prof. 

 Gaudry ^ as to the equivalency of these deposits. 



V. — London Clay in the Vicinity or Southampton. 

 By J. W. Elwes, Esq. 

 mHE outcrop of the London Clay to the north of Southampton, 

 X near the edge of the Hampshire basin, beyond Bishopstoke, 

 Eomsey, etc., was mapped by the officers of the Geological Survey 

 many years ago. 



The stratum appears as a narrow belt between the Woolwich 

 and Reading series on the one hand, and the Lower Bagshot on the 

 other, the general dip being a gentle southerly one. The Brackle- 

 sham beds are mapped as following to the south, occupying the 

 whole of the area on which Southampton is situated. A large 

 portion of it is covered with drift, now being officially mapped. 

 The London Clay was found in the artesian well on Southampton 

 Common ; the section was described by Mr. J. E. Keele (Rep. Brit. 

 Assoc. 1846). The uppermost beds, 74 feet in thickness, exposed 

 in this section were regarded as the Lower Bagshot. 



^ ' Palseontologia Indica,' ser. 10, vol. ii. p. 162. 



2 " Oss. Foss." ed. 2, vol. iv. p. 500 (1822). » 75^^. vol. iii. p. 403. 



4 " Les Enchainements, etc., Mam. Tert." p. 5 (1878). 



