PLATE XXI. 



Fio. Pagk 



1. Belonosfomus hooleyi, sp. now ; left flank-scale, outer view, lacking lower 



end and part of outer face, one-and-a-half times nat. size. — Wealden ; 

 Atherfield, Isle of Wight. The type specimen. Collection of Reginald 

 W. Hooley, Esq., F.G.S. 100. 



2. Ditto ; dorsal scale, outer view, three times nat. size. — Wealden ; Isle of 



Wight, Mantell Collection (B. M. no. 2841 9). 100. 



3. Ditto (?) ; right flank-scale, outer view, one-and-a-half times nat. size. — 



Wealden; Sevenoaks, Kent. Sedgwick Museum, Cambridge. 101. 



4. Pholidophorus omatus, Agassiz; imperfect bead and abdominal region, 



right lateral and ventral view, one-and-a-half times nat. size. — 

 Middle Purbeck Beds ; Swanage, Dorset. Museum of Practical 

 Geology, London, no. 284:39. ag., angular; l>r., branchiostegal 

 rays; <■!., clavicle; d., dentary ; top., interoperculum ; mx., maxilla; 

 op., operculum; orb., orbit; pet., pectoral fin; pic, pelvic fin; 

 pop., preoperculum ; scl., supraclavicle ; S9., postorbitals ; sop., sub- 

 operculum. 103. 



5. Pholidophorus granulatus, Egerton ; greater part of fish, right lateral and 



ventral view, two-thirds nat. size, with some anterior flank-scales 

 (5 a) and some caudal flank-scales (5 b), outer view, enlarged one- 

 and-a-half times. — Ibid. Beckles Collection (B. M. no. P. 6379). 

 op., left operculum, inner view ; sop., left suboperculum, inner view. 106. 

 (). Ditto; portion of roof of skull, upper view, showing frontals (/<'.), left 

 parietal (pa.), and right squamosal (*'/.), nat. size, with some anterior 

 flank-scales (6 a) and caudal scales (<)/>), inner view, enlarged one- 

 and-a-half times.— Ibid. Enniskillen Collection (B. M. no. P. 3605). l<»'i. 



