146 
ACTINOPTERYGir. 
Diploxnystus vectensis (Newton). 
1889. Clupea vectensis, E. T. Newton, Quart. Journ. Geol. Soc, 
vol. xlv. p. 112, pi. iv. 
1889. Diplomijstus vectensis, A. S. Woodward, Geol. Mag. [3] vol. vi. 
p. 230. 
Type. Imperfect fish; G. W. Colenutt Collection, Hyde. 
A small species, attaining a length of about 0-06, the caudal 
region comparatively slender. Length of head with opercular 
apparatus slightly less than the maximum depth of the trunk and 
contained about four and a half times in the total length of the fish 
to the base of the caudal fin. Abdominal vertebrae about 25, 
caudals 15 in number. Dorsal fin deeper than long, with 14 or 15 
rays; anal fin comparatively low and extended, with 16 or 17 rays. 
Dorsal scutes narrow ; ventral ridge-scales 20 to 22 in number, 
not serrated, decreasing in size backwards. 
Form. ^ Log. Lower Oligocene (Osborne Beds) : near Hyde, Isle 
of Wight. 
P. 5930. Very small specimen; King’s Quay, near Byde. 
Presented hy G. W. Colenutt, Esq., 1889. 
P. 6853, -54. Small slab displaying small individuals, and several 
other specimens; King’s Quay. 
Presented hy G. F. Harris, Esq-, 1893. 
The imperfect specimens named as follows from the Upper 
Cretaceous of Pietraroja, Province of Benevento, Italy, also belong 
to Diplomystus A - A /• 3 
Histiurus elatus, 0. G; Costa, Atti Accad. Pontan. vol. v. (1850), 
• p. 289, pi. vi’. fig! 3, and ibid. vol. vii. (1853), p. 8, pi. i. 
fig. 2. 
Histiurus serioloides, 0. G. Costa, ibid. vol. viii. (1864), p. 60, 
pi. ix. fig. 3. 
Histiurus ventricosus, 0. G. Costa, Atti B. Accad. Sci. Napoli, 
vol. ii. no. 21 (1865), p. 5, pi. ii. figs. 3-5. 
The original specimens are in the Geological Museum, University 
of Naples. 
Genus CLUPEA (Artedi), Linnaeus. 
[Syst. Nat. ed. 10, 1758, p. 317.] 
Syn. Alosa, G. Cuvier, Begne Animal, ed. 2, vol. ii. 1829, p. 319. 
Meletta, Cuvier & Valenciennes, Hist. Nat. Poiss. vol. xx. 1847, 
p. 366. 
Uropterina, P. Lioy, Atti Soc. Ital. Sci. Nat. vol. viii. 1865, p. 413. 
Ptericephalina, P, Lioy, ibid. p. 414. 
