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 tlie same genus from a corresponding 

 horizon at iVlice, near Fort Beaufort, was long ago recorded 

 by Owen *, without description, under the MS. name of Hyp- 

 terus Bainii. 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 scutata, though further specimens 

 are required for satisfactory discussion. The British-Museum 

 collection, moreover, contains fragments of other Palteoniscid 

 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 

 Semionotus cajjensis and Cleithrolepis Extoni from the Storm- 

 berg Beds t, in addition to the tooth of Ceratodus described 

 below. 



In conclusion, through the kindness of Professor Rupert 

 Jones, F.E..S., the writer is enabled to append a synopsis of 

 the subdivisions of the South-African " Karoo Series " of 

 A. G. Baiuj showing the stratigraphical position of the few 

 fossil fishes from that formation ah-eady described : — 



f Stormberg Beds (Upper Karoo). Yield Faleeo- 



Iniscus Bainii, Eg"., P. sculptus, Eg., Semio- 

 notus capensis, A. S. Woodw., Cleithrolepis 

 I Extoni, A. S. Woodw., and Ceratodus 



capensis, A. S. Woodw. 



I Beaufort JBeds (Lower Karoo). ["Karoo Beds" 



of (Jreen, Quart. Joiirn. Geol. Soc. 1888, 



-u A T?nn Q"PT?Ti?Q I ^^^ " upper Karoo Beds " of Dunn's Map 



KAKUU !Mi.lxm& , ^^^ Report.] Yield Atherstonia scutata, 



{A.G.Bain). ^ A. S. Woodi. 



Kimberley Shales. [" Olive Shales " of Stow, 



Quart. Journ. Geol. Soc. 1874.] 

 EcCA Beds. [Including " Koonap Beds " and 

 " Ecca Beds " of T. Rupert Jones, Quart. 

 Journ. Geol. Soc. 18G7, the " Lower Karoo 

 Beds " and " Dwyka Conglomerate " of 

 Dunn's Map and Report.] 



* R. Owen, ' Catalogue of the Fossil Reptilia of South Africa ' (1876), 

 p. ix. 



t Smith Woodward, " On two new Lepidotoid Ganoids from the Earlj 

 Mesozoic Deposits of Orange Free State, South Africa," Quart. Journ. 

 Geol. S«c. Tol. xUt. (1888), pp. 138-148, pi. vi. 



