402 . 
ACTINOPIERYGII. 
mandible at least one third its length ; superficial rugosity on 
cranial roof and dentary fine and delicate. Teoth modorately stout, 
quite smooth, with apices slightly incurved. 
-form. <Sj Loc. Lower Eocene (London Clay) : London Basin. 
P. 4148. Very fragmentary small head with opercular apparatus, 
labelled as intended to be the type specimen ; Sheppey. 
The jaws with teeth aro not shown. Enniskillen Coll . 
38919. Fragmentary head and abdominal region, showing scales 
with parts of the antorior dorsal and pelvic fins ; Sheppey. 
Bowerbanlc Coll- 
P. 356 a. Two more imperfect specimens displaying anterior squam- 
ation, some of the scales extending over the operculum ; 
Sheppey. Purchased , 1881. 
P. 9455. Fine comparatively large head with opercular apparatus, 
displaying teeth ; Sheppey. Purchased. 
P. 9456. Two smaller imperfect heads, showing teeth ; Sheppey. 
Purchased- 
P. 7524. Imperfect head with opercular apparatus; Sheppey. 
Caleb Evans Coll- 
40204. Fragmentary head ; Sheppey. Purchased, 1 867. 
P. 9457. Smaller fragmentary head ; Sheppey. Purchased. 
43117. Imperfect small head, displaying opercular bones ; Primrose 
Hill, London. Wetherell Coll. 
P. 1742. Five fragmentary specimens ; Sheppey. Egerton Coll- 
P- 4147. Three fragmentary specimens ; Sheppey. 
Enniskillen Coll- 
24614. Hinder half of cranium ; Sheppey. Purchased, 1850. 
Scombrinus macropomus (Agassiz). 
1835. Cybium macropomum, L. Agassiz, Poiss. Foss., Feuill. P- 42 
(name only). 
1839-44. Cybium macropomum , L. Agassiz, Poiss. Foss. vol. v. pt- 
p. 62, pi. xxvi. figs. 1-3. 
1854. Cybium macropomum, It. Owen, Catal. Foss. Rept. & Pisces 
Mus. Roy. Coll. Surg. p. 161. 
Hype. Imperfect head ; Museum of Natural History, Paris. 
A species known only by the head with opercular apparatus, 
