76 PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [DcC. 4, 



Paces, 

 beneath the Cardifxe, the Cypnea tuberculosa * maj be 

 found. The bed then becomes less fossiliferous, and 

 passes into a dark -grey laminated clay, broken up and 

 rearranged, mixed with dark sand and black pebbles. 

 "Barn-bed" of Dixon 330 



5016 



Below this the beds are covered up, and no fossils are to be found. 

 I believe it is the lowest fossiliferous bed of the series ; for it is a 

 fortunate circumstance to the collector that the presence of fossils, 

 and the calcareous matter derived from them, impart a hardness to 

 the matrix, which causes the fossiliferous beds to resist the action 

 of the water, so as to be always more exposed to view than un- 

 fossihferous beds. 



The Park, on the east side of Selsea, mid the Miooen Rocks. — On 

 the eastern side of the Selsea peninsula there is also a display of a 

 part of the same series. The highest bed seen is on the horizon 

 of VII., — the Nummulina laevigata bed being better developed there 

 than elsewhere, and abounding in fossils. All the succeedrng beds, 

 down to the Cardita planicosta bed, No. 1, are usually exposed upon 

 that part of the coast which is called " The Park." 



There is a ledge of rocks off at sea, about a mile south of Selsea 

 Bill, called the Mixen Eocks: they consist of a sandy limestone, 

 made up almost entirely of Foraminifera, principally of a Miliola 

 and an Alveolina. I believe the rock to be nothing more than a 

 continuation of No. 22 (h) under a more calcareous condition f. 



Bury Cross. — In following the course of the Bracklesham Beds 

 westward, the next section is that at the Gosport Water-works at 

 Bury Cross, of which Mr. Pilbrow has supplied a section in vol. xvi. 

 of the Journal, at p. 447. 



I have examined the series of specimens preserved at the office 

 of the Water-works at Gosport, and was much interested by their 

 striking resemblance to the lower part of the Bracklesham Bay 

 beds. The following abstract of the section is made from these 

 specimens, which were taken at the depths noted : — 



ft. in. 



Laminated clay (weathered) 11 9 



Laminated clay and dark sand 37 3 



{g) Nummulina Icsvigata bed G7 3 



\h) Very green sand, with a few specimens of Nummulina Icb- 

 \ vigata 75 



r Turritella-bed, a conglomerate of shells, as at Bracklesham, 



! here containing Cardita planicosta 95 



I (^) Cardita-bed ; shells I'ather smaller 104 



[ Shaly and peaty clays ..109 



In Mr. Pilbrow's section he has given sandy clay and black peb- 

 bles, 1 foot 3 inches thick, at 329 feet ; and the boring was carried 



* This is not an extremely rare shell, thougli A^ery difficult to obtain perfect ; 

 but it is seldom that the bed is sufficiently expensed to ullbrd a fair opportunity 

 of observing tliem. 



t For a description of this part of the coast of Sussex, sec Dixon's ' Fossils 

 and Geology of Sussex,' chap. ii. 



1 



