ELOPID^. 
33 
fin-rays excessively elongated. Scales small or of moderate size, 
usually ornamented with delicate radiating ridges ; no enlarged or 
thickened ridge-scales ; lateral line inconspicuous. 
Thrissopater salmoneas, Giinther. 
1872. Thrissopater salmoneus, A. Giinther, he. cit. no. 1, pi. i. 
Type. Imperfect fish ; Woodvvardiaii i^Iuseum, Cambridge. 
The t 3 ’pe species, attaining a length of about O'T. Length of 
head with opercular apparatus contained three and a half times, 
maximum depth of trunk about four and a half times in the total 
length of the fish to the base of the caudal fin. Posterior suborbital 
plates radiately furrowed, and their extent exceeding one third the 
length of the skull; width of orbit less than this measure ; width of 
operculum equalling at least half the length of the skull. About 50 
scales in a transverse line on the trunk in front of the dorsal fin; 
the enlarged axillary scale longer than the rays of the pectoral fin; 
ornamental strise on scales often slightly wavy. 
Form. Log. Albian: Kent. 
P. 9052. Pine head, in crumbling condition, and probably incapable 
of permanent preservation; Gault, Polkestone. Between 
25 and 30 branchiostegal rays and a small gular plate are 
shown. Purchased., 1899. 
47199. Crushed head showing form of cranial roof and maxilla ; 
* Gault, Polkestone. Gardner Coll. 
47194. Much fractured head and abdominal vertebrae of small fish; 
Gault, Polkestone. Gardner Coll. 
47202. Portion of abdominal region displaying the elongated scale 
(axillary appendage) at the base of the pectoral fin; 
Gault, Polkestone. Gardner Coll. 
47189. Imperfect large trunk displaying scales and caudal vertebrae; 
Gault, Polkestone. Gardner Coll. 
Thrissopater magnus, sp. nov. 
[Plate Y.] 
1837-11. Hypsodon lewesiensis, L. Agassiz, Poiss. Poss. vol. v. pt. i. 
p. 100, pi. XXV a. fig. 1, pi. XXV h. figs. 4, 5 {errore). 
Type. Imperfect head; British Museum. 
A large species, known only by the head and other fragments. 
D 
PAKT IV. 
