508 



PEOCEEDmGS OP THE GEOIOGICAI SOCTETY. 



a clay, 7^ feet thick. No. 9 is 

 an indurated shell-band, 3 inches 

 thick ; its shells are different from 

 those found in ISTo. 13. Some of 

 the species that make their first 

 appearance here go on increasing 

 in numbers in the deposits marked 

 8 and 7. Specimens 9, 9 a, 9 b, eon- 

 tain numerous fragments and casts 

 of shells, obscure gregarious bi- 

 valves [possibly Cyrena, T, R. J.]. 



No. 8 is a clay, from 18 inches 

 to 2 feet where thickest, inter- 

 spersed with streaky patches of 

 shells [_Cerit7imm ?, T. E, J,], the 

 intervening clay being devoid of 

 them. 



No. 7 is a deep-red clay, with 

 yellow stripes running through it. 

 This, like the preceding, has bands 

 of shells (smaU bivalves and uni- 

 valves). 



It is remarkable of these three 

 last-mentioned strata, Nos. 7, 8, 

 and 9 [which may be of estuarine 

 origin, T. R, J.], that they gra- 

 dually thin oiTt. 



The deposit No. 6 is a light 

 slate-coloured clay, 9 feet 2 inches 

 thick. No. 5 is a narrow band of 

 clay, varying in width from 1 to 

 3 inches, full of fragments of shells, 

 with a small Ostrea in abundance. 

 Above this is a dejDosit of a similar 

 light slate-coloured clay. No. 4, 

 8 feet 6 inches thick ; and upon 

 this a stripe of a yellowish sandy 

 clay (No. 3) or, rather, a loam, 

 pulverizing between the fingers; 

 and above it is a clay similar to 

 Nos. 4 & 6, two feet thick. This 

 is capped with a sandy kind of 

 marl, No. 1, varying from2 to 4feet 



* The sides of this outlier were too 

 thickly covered with debris for me to 

 obtain a good section ; but I imagine 

 that it must be similar to tlie stratified 

 clays at the Bethelsdorp Saltpan, as the 

 spines of Cidaris jpicstulifera are found 

 in the d6bris. 



