SC0MBRID*. 
471 
attaining a length of about 0-3, but usually smaller. Head slightly 
longer than deep ; inner pair of postero-superior fossae on cranium 
somewhat expanded in front, extending half the length of the 
cranium. Bones of opercular apparatus marked with irregular, 
radiating, rounded wrinkles or ridges. 
Form, (J‘ hoc. Bower Eocene (London Clay) : London Basin. 
P * 623 a. Imperfect head with opercular apparatus, about 0*16 in 
length, marked by Egerton as intended to be the type 
specimen of this species ; Sheppey. The irregular 
wrinkling on all the opercular bones is well shown. 
Egerton Coll. 
P * 1753. M ore imperfect similar head, partly decaying, labelled by 
Egerton ; Sheppey. Egerton Coll. 
35687. Equally small imperfect head, showing jaws; Sheppey. 
Purchased, 1859. 
28856. Large head, showing jaws ; Sheppey. Purchased, 1854 
38916. Cranium 0*095 in length, with foremost vertebral centrum 
fused with basioccipital ; Sheppey. The parasphenoid is 
partly broken away, exposing a large basicranial canal. 
The vomer bears minute teeth arranged in a small, 
median, longitudinally-extended patch. Bowerbank Coll. 
I 1 - 1755. More imperfect larger cranium ; Sheppey. Egerton Coll. 
1698 a. Smaller cranium, showing minute teeth on edge of 
palatine bone ; Sheppey. Egerton Coll. 
P * 1698b. Imperfect head, partly decaying, displaying mandible; 
Sheppey. E 9 erU > n ColL 
39445. More imperfect decaying head ; Sheppey. Bowerbank Coll. 
P * 9481. Pyritised and partly decaying larger specimen ; Sheppey. 
Enniskillen Coll, 
39221. Fine head 0*17 in length from hinder border of quadrate to 
tip of premaxilla ; Sheppey. The premaxill® are less 
produced in front of the cranium than in Cybium and 
Acanthocybium. Bowerbank Coll. 
P - 159. Imperfect large cranium ; Sheppey. Purchased, 1880. 
28624. Imperfect larger cranium ; Sheppey. Purchased, 1853. 
33305. More imperfect large cranium ; Sheppey. Purchased, 1858. 
