EXPLANATION OF THE PLATES. 319 



Fig. 10. Imperfect specimen of afishfromHamsey, p. 133. 



Fig. 11. Part of the body of Muraena Lewesiensis, exhibiting traces of a fin, p. 232. 



TABLET XXXV. 



Specimens of Zeus Lewesiensis, in chalk. 

 Fig. 1. Part of the body, exhibiting several vertebrae and ribs. 



Fig. 2. This specimen is the counterpart of the fossil represented in Tab. XXXVI. it 

 shews the anal fin, the termination of the lower jaw, &c. p. 234. 



TABLET XXXVI. 



The most perfect example of Zeus Lewesiensis hitherto discovered ; it exhibits part of the 

 opercula branchialia, the dorsal, and anal fin, and the taU, p. 234. 



TABLET XXXVII. 



A fine specimen of the body of Amia ? Lewesiensis. 



a. The anterior dorsal fin. 



b. The posterior dorsal fin. 



c. One of the ventral fins, vide p. 240. 



TABLET XXXVIII. 



A specimen of Amia Lewesiensis, exhibiting its internal stmcture, p. 240. 

 a. The inferior margin of the orbit. 

 h. The maxillas, with two teeth in the upper jaw. 



c. The impression of one of the opercula branchialia. 



d. One of the ventral fins. 

 e. e. e. The an- bladder. 



TABLET XXXIX. 



A dorsal fin, or radius, of a fish allied to the genus Balistes, from the Upper chalk, near 

 Lewes, p. 229. 



TABLET XL. 



Fig. 1. The body of Salmo Lewesiensis, p. 235. 



Fig. 2. The usual appearance of the specimens of Muraena Lewesiensis, p. 232. 



Fig. 3. Dorsal fin of a fish alhed to the BaUstes, p. 230. 



TABLET XLI. 



Fig. 1. The lower jaw, containing twelve teeth, of Esox Lewesiensis, p. 237. 



