Mr. A. S. Woodward on a Tooth of Ceratodus. 243 
Note on a Tooth of Ceratodus from the Stormberg Beds of the 
Orange Free State, South Africa. 
Though not hitherto recorded, the occurrence of Ceratodus 
in the Karoo Series of South Africa is a circumstance to be 
expected, and it is interesting now to be able to make known 
the discovery of a very typical tooth. The specimen in 
question was received by the British Museum in exchange 
from the Bloemfontein Museum, Orange Free State, through 
the intervention of Dr. Hugh Exton, F.G.S., and the 
locality being Smithfield, Orange Free State, the fossil 
was doubtless obtained from the fish-bearing horizon of the 
Stormberg Beds. The tooth is unfortunately imperfect, as 
shown in the accompanying figure (Pl. XIV. fig. 4); but 
sufficient remains to render its approximate determination 
possible. It is of comparatively small size, thin, and trian- 
gular in shape, with the angulation of the inner margin acute 
and placed opposite the second denticle. When complete the 
denticles would be at least five in number, and these are all 
separated by deep notches at the outer margin, while the 
ridges extending from them are acute and some nearly reach 
the inner angulation. 
In the acuteness and number of the ridges the new South- 
African tooth most nearly approaches those of Ceratodus 
serratus, Ag.*, C. Philippsti, Ag.t, C. runcinatus, Plien.f, 
and certain forms discovered in the Kota-Maleri Beds of 
India§. From all these, however, the specimen differs in 
being as thin as the rounded-ridged teeth of C. Kaupz, Ag. ; 
and it may therefore be regarded as indicating a new species 
— Ceratodus capensis. 
EXPLANATION OF PLATE XIV. 
Fig. 1. Atherstonia scutata, gen. et sp. nov. Lateral aspect of fish, one 
half nat, size—Beaufort Beds, Colesberg, Cape Colony. [Brit, 
Mus. No. P. 4735. | 
Fig. 2. The same. Flank-scale; a, external aspect; 6, internal aspect, 
twice nat. size. 
Fig. 3. The same. Scales at base of dorsal fin, nat. size. 
Fig. 4. Ceratodus capensis, sp. nov. Tooth; a, coronal aspect; 6, ante- 
rior aspect of the same.—Stormberg Beds, Smithfield, Orange 
Free State. [Brit. Mus. No. P. 4807.] 
* L. Agassiz, Rech. Poiss. Foss. vol. iii. (1838), p, 135, pl. xix. fig, 18, 
+ L. Agassiz, ibid. p. 135, pl. xix. fig. 17. 
} pet and Plieninger, Beitr. Palaont. Wiirttembergs (1844), p. 86, 
ext oO: 
Q Sot: Oldham, “On some Fossil Fish-Teeth of the Genus Ceratodus 
from Malédi, South of Nagpur,” Mem. Geol. Surv. India, vol. i. (1859), 
pp. 295-309, pls. xiv.—xvi. 
