INCEET^ SEDIS. 
613 
Platygenys rugosvs, E. Owen, Catal. Foss. Kept. & Pisces, Mus. Eoy. 
Coll. Surg. (1854), p. 165,no. 664.—London Clay; Sheppey. 
[Fragmentary head.] 
Pygacanihus altus^ E. Owen, op. cit. 1854, p. 166, no. 668.— 
London Clay ; Sheppey. [Imperfect head.] 
Toxopoma politum., E. 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, Eep. Erit. Assoc. 1844 (1845), pp. 307, 308 : — 
Bothrosteus brevifrons, Bothrosteus latus^ Echenus politus. Gadopsis 
hreviceps, Phasganus declivis, Rhipidolepis elegans, and Synophrys 
hopei. 
s. XK :z-. ir. CPS' (/f 2, ^ 
