242 Mr. A. S. Woodward on Atherstonia. 
dorsal margin with a continuous series of very large deeply 
overlapping ridge-scales. 
The single known species described above may be termed 
Atherstonia scutata. 
Stratigraphical Position and associated Fish-Fauna. 
Dr. Atherstone’s fossil was obtained from. the Beaufort 
Beds of Colesberg, Cape Colony, and the imperfectly preserved 
trunk of a smaller fish of the same genus from a corresponding 
horizon at Alice, near Fort Beaufort, was long ago recorded 
by Owen *, without description, under the MS. name of Hyp- 
terus Bainvi. ‘The latter fossil is also exhibited in the British 
Museum (No. 46007), having been presented by the Trus- 
tees of the Albany Museum ; and it may even be specifically 
identical with Atherstonia scututa, though further specimens 
are required for satisfactory discussion. The British-Museum 
collection, moreover, contains fragments of other Paleoniscid 
fishes from various parts of the great Karoo Series of South 
Africa, though, like the scales described by Egerton, these 
cannot as yet be precisely determined ; and the only asso- 
ciated fishes of other types hitherto definitely known are 
Semtonotus capensis and Cleithrolepis Extoni from the Storm- 
berg Beds f, in addition to the tooth of Ceratodus described 
below. 
In conclusion, through the kindness of Professor Rupert 
Jones, F.R.S., the writer is enabled to append a synopsis of 
the subdivisions of the South-African ‘‘ Karoo Series” of 
A. G. Bain, showing the stratigraphical position of the few 
fossil fishes from that formation already described :— 
(StorMBERG Brps (Upper Karoo). Yield Palgo- 
niscus Bain, Eg., P. sculptus, Eg., Semio- 
notus capensis, A. 8S. Woodw., Clerthrolepis 
Exton, A. 8. Woodw., and Ceratodus 
capensis, A. S. Woodw. 
Bravrort Beps (Lower Karoo). [Karoo Beds” 
of Green, Quart. Journ. Geol. Soc. 1888, 
and “ Upper Karoo Beds” of Dunn’s Map 
and Report.] Yield Atherstonia scutata, 
A. S. Woodw. 
KIMBERLEY SHALES. [“ Olive Shales” of Stow, 
Quart. Journ. Geol. Soe. 1874. ] 
| 
KAROO aie el 
1 
| | 
ae Beps. [Including “ Koonap Beds” and 
L 
(A. G. Bain). 
“ Keca Beds” of T. Rupert Jones, Quart. 
Journ. Geol. Soc. 1867, the “ Lower Karoo 
Beds” and “ Dwyka Conglomerate” of 
Dunn’s Map and Report. ] 
* R. Owen, ‘ Catalogue of the Fossil Reptilia of South Africa ’ (1876), 
«1x. 
+ Smith Woodward, “ On two new Lepidotoid Ganoids from the Early 
Mesozoic Deposits of Orange Free State, South Africa,” Quart. Journ. 
Geol. Soc. vol. xliy. (1888), pp. 158-145, pl. vi. 
