STOW SOTTTH-APRTCAN GEOLOGY. 505 



zogii, and Pleuromya lutraria are very numerous, these, in fact, 

 being the predominant forms of this zone. Whether No. 8, in the 

 kloof near McLoughlin's Bluff, is a continuation of this (No. 11), as 

 seems probable, will require further proof. Again, in No. 10, near 

 Cuyler^ Manor, are numerous Ammonites and Trigonice, and the 

 Exogyra of the lower strata has very considerably diminished in 

 numbers ; while in No. 9 we find a perfect " Trigonia-zone " very 

 similar to that marked No. 3 in Section G, of the Upper Sundays 

 River *. 



Again, in Section E at McLoughlin's Bluff, we find No. 7, a 

 zone containing numerous Hamites and Mocliolce associated with a 

 large Ancyloceras (?). This bed seems to have its equivalent in 

 No. 3, Section Gr, of the Upper Sundays-River strata ; and, lastly, we 

 have No- 5, in Sections E and F, with multitudes of Trigonia ventricosa 

 and its accompanying Trigonia van. To show my meaning better, 

 I have massed the foregoing Sections A, B, C, E, E & G into one 

 general one (fig. 3). 



B. JSaliferous beds of the Uitenhage Formation. — I will now 

 proceed to notice some sections I have made at the Government and 

 Bethelsdorp Saltpans, the Koega River, and the Salt Ylei near Port 

 Elizabeth. These sections represent the stratified clays and sand- 

 stones of the " Saliferous deposits " of the " Uitenhage formation," 

 which have been placed by some investigators f as underlying the 

 Zwartkops fossiliferous sandstones of which we have been speaking. 



Government Saltpan betiveen the ZiuartTcops and Koega Rivers. — The 

 first locality I shall mention is that of the Government Saltpan be- 

 tween the Zwartkops and Koega Rivers (see fig. 6, 7, and 7). This sec- 

 tion (Section I) has been figured and described by Dr. Atherstone X- 

 1,2, & 3 are, as he says, thin bands of hard, highly fossihferous, 

 dark ferruginous sandstone, about 3 or 4 inches thick, containing 

 broken shells (^Trigonia, Ostrea, Turritella) and spines of Cida- 

 rites. These hard bands alternate with saliferous shales and sand- 

 stones, with a dip of 8° towards the north-east § ; the hard band (1), 

 overlying porous sandstone, forms the bed of the salt-pan ; and maris 

 (without salt) and soil cap the uppermost band. It is very difficult 

 to obtain specimens of the numerous fossils, as they are very perish- 

 able. Both Mr. Longlands and myself failed, during a somewhat 

 hurried visit to the locality, to obtain any. 



Sandstones on the Koega River. — The sandstones on the banks of 



* Mr. G. W. Stow has sent to England specimens of Trigonia Herzogii and 

 fossil wood with Gastrochwnw, from the Zambesi, that perfectly resemble in 

 zoological and llthological characters these fossils from the Sundays Eiver ; and 

 they have their associated Selenite, as at Greelhoutboom. — T. R. J., Oct. 19, 1871. 



t See Dr. Atherstone's " Lectures on the Geology of Uitenhage," Eastern Pro- 

 vince Monthly Magazine, vol. i. 1857, pp. 581, 684, &c., and Quart. Journ. Geol. 

 Soc. vol. xxiii. pp. 149 & 167.— T. R. J. 



I See Dr. Atherstone's sketch section, East. Prov. Mag. loc. cit. — T. R. J. 



§ The beds up the Sundays River (near Geelhoutboom), which Dr. Ather- 

 stone considers to be equivalent to those of the Saltpan, have a dip, he says 

 {loc. cit. p. 581), of 8° to the south-west.— T. E. J. 



