PLATE XXIII. 



Fia. P AGE. 



1. Leptolepis brodiei, Agassiz ; very small immature fish, right lateral view, 



four times nat. size. — Lower Purbeck Beds ; Vale of Wardour, 

 Wiltshire. The type specimen of Oxygonius tenuis, Agassiz. P. B. 

 Brodie Collection (B. M. no. P. 473"). 1 25. 



2. Ditto; immature fish shortened by distortion, right lateral view, five 



times nat. size. — Ibid. The type specimen of Leptolepis nanus, 

 Egerton. P. B. Brodie Collection (B. M. no. P. 7637). 125. 



3. Ditto; fish lacking most of caudal fin, left lateral view, twice nat. size. — 



Ibid. The type specimen. P. B. Brodie Collection (B. M. no. 



P. 7635). 123. 



4. Ditto; distorted fish, three times nat size.- — Ibid. P. B. Brodie Collection 



(B. M. no. P. 7635 a). 123. 



•">, 6. Ditto; two well-preserved specimens of trunk, left lateral view, twice 

 nat. size. — Lower Purbeck Beds; Lime Kiln Quarry, Teffont, Vale 

 of Wardour, Wiltshire. Rev. W. R. Andrews' Collection (B. M. 

 nos. P. 9847, 48). c, coprolitic matter in intestine. L23. 



7. Leptolepis, sp. ; right dentary bone, inner view, twice nat. size. — Wealden 



(Wadhurst Clay); Broad Oaks, Brede, near Hastings. Teilhard and 

 Pelletier Collection (B. M. no. P. 11904). L25. 



8. PleuropJiolis formosa, sp. nov. ; nearly complete fish, left lateral view, 



twice nat. size. — Lower Purbeck Beds; Teffont, Wiltshire. The 

 type specimen. British Museum, no. P. 10986. 115. 



9. Ditto; head, left lateral view, three times nat. size. — Ibid. British 



Museum, no. P. 10955. ecpt., ectopterygoid ; enpt., entopterygoid ; 

 mil., inaudible; <>ji., operculum; pas., parasphenoid ; /"»/'., pre- 

 operculum. 1 1 f>. 



1". Ditto; foremost pectoral fin-ray bearing expanded fulcra, enlarged ten 



times. — Ibid. British Museum, no. P. 9851. 116. 



11. Ditto; part of anal fin, showing supports, five times nat. size. — Ibid. 



British Museum, no. P. 10986. 1 hi. 



12. PleuropJiolis crassicauda, Egerton; imperfect fish, right lateral view, 



twice nat. size. — Middle Purbeck Beds; Durdlestone Bay, Swanage, 

 Dorset. The type specimen. P. B. Brodie Collection (B. M. no. 

 P. 7647). lis. 



13. Ditto; fish with incomplete fins, left lateral view, twice nat. size. — Ibid. 



British Museum, no. 43615. 118. 



