432 
ACTINOPTERYGII. 
Belg. [3] vol. i. (1881), p. 119, with plate. — Middle Eocene 
(Bruxellian) ; Schaorbook, near Brussels. [Fragments of 
trunk with median fins ; Royal Museum of Natural 
History, Brussels.] 
Genus PLATAX, Cuvier. 
[Rogne Animal, vol. ii. 1817, p. 334.] 
Irunk much deepened, and head short and deep, with a large 
supraoccipital crest. Eye very large ; cleft of mouth small, the 
gape not extending behind the anterior border of the orbit, 
relatively small maxilla expanded behind ; teeth in prcmaxilla and 
dentary setiform and clustered, those of the outer scries largest and 
notched at the apex. Pelvic fins inserted directly below the pec- 
torals, somewhat larger than the latter; dorsal fin much elevated 
and extending along nearly the whole of the back, with 3 to 7 short 
anterior spines ; anal fin also considerably elevated, with 3 short 
anterior spines ; caudal fin rounded or only slightly forked. Scales 
thin and small, none enlarged, some extending over the bases of 
the median fins. 
Existing species occur in the Indian Ocean and the western part 
of the Pacific Ocean. 
Platax woodward!, Agassiz. 
1833. Figures by S. Woodward, Geol. Norfolk, pi. iii. tigs. 31-33. 
1842-44. Platax woodwardii, L. Agassiz, Poiss. Foss. vol. iv. p- 250, 
pi. xix. fig. 3. 
1882. Platax woodwardii, E. T. Newton, Vert. Forest Bed (Mem. Geol. 
Surv.), p. 122, pi. xix. figs. 1-3. 
1891. Platax woodwardi, E. T. Newton, Vert. Pliocene Deposits, 
Britain (Mem. Geol. Surv.), p. 89. 
Type. Detached bones, thickened by hyperostosis. 
An indeterminable large species known only by detached bones, 
most of which are thickened by hyperostosis. 
Form, cj- Loc. Lower Pliocene (lied and Coralline Crags) : Suffolk. 
Upper Pliocene (Norwich Crag, Weybourn Crag, and Forest Bed) : 
Norfolk and Suffolk. 
301-3, 305 6, 308, 312, 317-8, 321, 323, 327. Numerous thickened 
bones of different forms, some polished to show structure , 
Crag, Norfolk and Suffolk. Purchased, 183/. 
23200. Four vertebral centra ; Crag, Norfolk. 
Presented by S. P. Woodward, Fs'l- 
