PLATE XXIV. 



Fig. Page. 



1. Pleuropholis longicauda, Egerton ; head and abdominal region, left lateral 



view, nat. size, with some dorsal scales (1 a) and some ventral scales 

 (1 h) enlarged four times. — Middle Purbeck Beds; Swanage, Dorset. 

 British Museum, no. 40724. 12<). 



2. Ditto; imperfect fish, left lateral view. nat. size, with some scales (2a) 



enlarged twice. — Ibid. British Museum, no. P. 7664. 120. 



3. Pachj/thrissops Idsvis, sp. nov. ; roof of skull, lacking end of snout, nat. 



size. — Ibid. British Museum, no. P. 12212. epo., epiotic ; Jr., 

 frontal; pa., parietal; ptf., postfrontal (sphenotic) ; .sore, supra- 

 occipital; sq., squamosal. 129. 



4. Ditto ; remains of head and three anterior vertebrae, right lateral view, 



two-thirds nat. size, with some lower teeth (4 a) enlarged twice. 

 —Ibid. Portion of specimen figured as Lepidotus minorbj L. Agassi/., 

 Poiss. Foss., vol. ii, pt. i (1844), pi. xxixc, fig. 12. Enniskillen 

 Collection (B. M. no. P. 4219). bh., basihyal; br., branchiostegal 

 rays: ch., ceratohyal; d., dentary; ecpt., ectopterygoid ; eph., front 

 of epihyal ; g.r., gill-rakers on gill-arch. 129. 



• r ). Ditto; middle portion of trunk, right lateral view, nat. size. — Ibid. 

 British Museum, no. 44845. d., dorsal fin-supports and fin; pic, 

 pelvic fin-supports with fins. 132. 



6. Pachythrissops vectensis, A. S. Woodward; portion of head, left lateral 



view, with lower expansion of right preoperculum (6a), one-quarter 

 nat. size. — Weald Clay; Atherfield, Isle of Wight. Collection of 

 Reginald W. Hooley, Esq., F.G.S. op., operculum ; pop., pre- 

 operculum; so., postorbital cheek-plates. 134. 



7. Ditto ; scale, nat, size. — Ibid. Collection of Reginald W. Hooley, Esq., 



F.G.S. 136. 



