126 ZWARTKOPS BORE AND THERMAL SPRING. 



cf immediate benefit have been clouded by the failure in finding 

 petroleum in the bore, it is just within the bounds of possibility 

 that a more permanent advantage has been gained, that may 

 develop into far-reaching results. 



APPENDIX " A." 



Extract of a Report by Dr. Kitchen to Dr. Rogers regarding 



fossils obtained from the Zzvartkops Borehole. 

 1,430 ft. Modiola species (Ornate; probably new species). 

 2,100 ft. Cyrena? and Cyprids. 

 2,190 ft. Gasteropod, indeterminate (with high body-whorl and 



elevated spire; possibly Limncca or allied form). 

 2 ;335 ft- Crushed lamellibranchs ; perhaps Cyrena; also Vivi- 



parus (Paludhia). 

 2,500 ft. Laminated clay crowded with Cyprids ; probably Cypris 



or Cypridia. 

 2,600 ft. Modiola species ('unon-iamcnted) ; Mclania species. 

 2,670 ft. Fragments of Modiola and other shells Bythinia, or 



perhaps Viviparus, with detached spire. 



I take all these clays to be from an estuarine and fresh-water 

 series of Wealden facies ; and although there is no decisive pa- 

 la^ontological evidence for a Wealden age. I should think that 

 they may well be in part contemporaneous with the marine fauna 

 of the Uitenhage series, and perhaps in part of the earlier Neoco- 

 mian age. Accurate correlation with the marine facies, on 

 palaeontological grounds, is of course excluded. 



Many of the crushed lamellibranchs are probably referable 

 to Cyrena, but the correctness of this reference could only be 

 proved by ascertaining the nature of the hinge, and, unfortu- 

 nately, no hinges can be seen in the specimens sent; but the 

 shape, so far as this can be made out, and the concentric linear 

 markings of the external surface, are compatible with this deter- 

 mination. 



The character of this bluish-green clay and the mode of 

 preservation of the fossils are strongly reminiscent of some of 

 the Wealden clays of England. 



(Sgd.) E. E. KrrcHEN. 



APPENDIX " P." 



Seven samples of the following metals were placed in the 

 running stream of the water for six months. These were wholly 

 submerged and without contact the one with the other. 



The samples were carefully weighed before putting in, and 

 were dried and cleaned with a brush before reweighing. 



The aluminium samples were, unfortunately, lost before the 

 six months expired, and a new sample was weighed and taken 

 out after five months' treatment in the running water. 



