Fossil Fishes oj the Upper Karroo Beds of South Africa. 253 



Behind the lower part is evidence of a large triangular place of 

 cartilage, and behind it are seen very clearly 8 radials and perhaps 

 a 9th, the last three resting on a longitudinal small additional 

 cartilage. Some neural spines are also shown but less clearly. The 

 arrangement of the radials is very similar to that in the specimen of 

 Hybodus basanus figured by Smith Woodward (2), but this specimen 

 is more complete. 



The teeth are very small. 



CffiLACANTHUS AFRICANUS, Bl'OOm. 



This species was described in Eec. Alb. Mus., vol. 1, pt. v., 

 1905 (3), from two imperfect specimens in Mr. Brown's collection. 

 No further specimens have been obtained, so that nothing more can 

 be added to the description there given. I, however, here give a 

 figure of the specimen. 



CEBATODUS CAPENSIS, S. -Woodward. 



This species was described in Ann. and Mag. Nat. Hist., September, 

 1889, by Smith-Woodward (4) from a tooth obtained by Dr. Exton 

 at Smithfield, O.R.C. Most probably the beds from which the type 

 was obtained are the same as those in which most of the species 

 described in this paper were found. In fact, the exact spot from 

 which most of the fossils were procured is probably nearer to the 

 town of Smithfield than to Eouxville. 



CEBATODUS KANNEMEYERI, Seeley. 



This species was described by Seeley in the Geol. Mag., April, 

 1897 (5), from a specimen obtained by Dr. Kannemeyer. It is a 

 large form with strong blunt denticles quite unlike either C. capensis 

 or the following species. 



CEBATODUS OBNATUS, n. sp. 



This new species is founded on a single rnandibular tooth found 

 by me at Vaalbank, near Burghersdorp. It is characterised by 

 having four ridges, of which the anterior three have sharp angles 

 of about 60. There may be a small fifth. The front ridge is almost 

 exactly equal in size to the 2nd and 3rd together. The second and 

 third ridges have along the edge a row of small tubercles. All the 

 ridges radiate from a single point. 



The length of the 1st ridge is 12 mm. and the 2nd 11 mm. 



A second small imperfect tooth, also from Vaalbank, is only about 



