152 



FOSSIL FISHES OF THE ENGLISH CHALK. 



Horizons and Localities. — Turanian zones: neighbourhood of Lewes, Sussex ; 

 Cuxton, Kent; Guildford, Surrey. Zone of Holaster subglolosus : Burham and 

 Wouldham, Kent ; Glynde and Amberley, Sussex ; Dorking and Merstham, Surrey. 

 Also Cambridge Greensand. 



2. Protosphyraena compressirostris, A. S. Woodward. Text-figure 45. 



1895. Protosphyrsena compressirostris, A. S. Woodward, Geol. Mag. [4], vol. ii, p. 213, woodc. fig. 2; 

 and Catal. Foss. Fishes B. M., pt. iii, p. 405, text-fig. 41, no. 2. 



Type. — Rostrum ; British Museum. 



Specific Characters. — Rostrum much elongated and attaining a length of at least 

 19 cm., with a transverse diameter of 2 cm. at its base, where the vomerine teeth 

 are implanted ; laterally compressed in its proximal half, the transverse section 

 here being an oval with vertical long axis ; circular in transverse section in its 

 distal portion, the top of the base gradually becoming flattened as it passes into 

 the cranial roof. External ornament as in P. ferox. 



Pio. 45. Outlines of Rostra of Protosphyrsena ferox, Leidy (i), and Protosphyrxna compressirostris, 

 A. S. Woodward (n), in side view and transverse sections, one half nat. size. — Chalk; Kent. 

 Harford Collection (B. M. nos. P. 5630, 5631). 



Remarks. — This species is known only by one rostrum, which differs from that 

 of P. ferox in the lateral compression of its proximal half. 



Horizon and Locality. — Unrecorded, but probably from one of the Turonian 

 zones at Cuxton, Kent. 



