. UPPER, OR FLINTY CHALK. ^7' 



Localities. Lewes, Brighton, Steyning. 



102. Teeth of the Squalus zygcenaf Tab. xxxii. figs. 4,7, 8, 10, 26, 28. 



These are either straight or sHghtly curved triangular teeth, with en- 

 tire cutting edges, but destitute of lateral processes. It has been sug- 

 gested that the latter may have been removed by accident, but this sup- 

 position does not appear tenable, since in those examples where the 

 cartilaginous base is perfect, no vestiges of lateral points can be de- 

 tected. 



They bear a close analogy to Mr. Parkinson's figure of a fossil tooth of 

 Sq. zyg<Bna; but their supposed identity, with those of the recent species, 

 must be received with some hesitation. 



LocaUties. Upper, and Lower chalk, near Lewes, and Brighton. 



103. Teeth of the Squalus galeus? Tab. xxxii. figs. 12, 14, 15, 16. 

 The width of these fossils frequently exceeds their length ; the body 



is inclined to one side, the edges are finely serrated, and the cartilaginous 

 base nearly straight. 



The form of this species varies considerably, but the characters enu- 

 merated, readily distinguish it from those above described. 



I am vmacquainted with the teeth of the recent animal, and have re- 

 ferred these fossils to the Sq. zyg<Bna, upon the authority of Mr. Parkin- 

 son, whose figure represents a specimen from the Kentish chalk, that 

 perfectly corresponds with those of Sussex. 



Localities. Lower chalk, near Lewes, and Brighton. 



104. Teeth of an unknown species of Squalus. Tab. xxxii. fig. 13. 

 Tab. xxxiii. fig. 9. 



These teeth are of a lanceolate form, with serrated edges ; they differ 

 very essentially from the preceding, and probably belong to an unknown 

 species of shark. 



Locality. Upper chalk, near Lewes; very rare. 



105. Tooth of a fish of the genus Squalus ? Tab. xxxii. fig. 22. 



This elegant little fossil resembles fig. 1276 of Lhwyd, and fig. Ill of 

 Brander, and is supposed to be analogous to the teeth of the recent dog- 

 fish of Scilla. Mr. Parkinson mentions that a species of Squalus from 



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