incerm: sebis. 
613 
Platygeiiys rugosiis, R. Owen, Catal. Foss. Rept. & Pisces, Mus. Roy. 
Coll. Surg. (1854), p. 165,no.661. — London Clay; Sheppey. 
[Fragmentary head.] 
Pyg acanthus altus, R. Owen, op. cit. 1854, p. 166, no. 668. — 
Loudon Clay ; Sheppey. [Imperfect head.] 
Toxopoma politum, R. Owen, op. cit. 1854, p. 164, no. 660. — 
London Clay, Sheppey. [Imperfect head.] 
Nothing is known of the fossil fish-remains from the London 
Clay of Sheppey, to which the following undefined names were 
applied by Agassiz, Rep. Brit. Assoc. 1 844 (1845), pp. 307, 308 : — 
Bothrosteus brevifrons, Bothrosteus latus, Echenus politus, Qadopsis 
breviceps, Phasganus declivis, Rhipidolepis elegans, and Synophrys 
hopei. 
