458 
ACTINOPTERTGII. 
19114. Smaller head, less distorted, showing most of the principal 
characters; Sheppey. The three anterior vertebral centra 
are shown in position. 
Presented hy Rev. F. W. Hope, 1845. 
P. 1750. Imperfect head, partly decaying, showing the jaws and 
the bases of the clustered minute teeth on the premaxillse; 
Sheppey. Egerton Coll. 
There seem to be no satisfactory characters by which the 
following specimens, from the London Clay of Sheppey, can be 
generically separated from Eothynnus :— 
38900. Imperfect head with opercular apparatus, deeper than in 
E. scdmoneus. BowerhanTc Coll. 
P. 629. Small imperfect head, similarly deepened, marked hy 
Egerton as intended to be the type specimen of Rhonclius 
carangoides, Agassiz (named in list in Eep. Brit. Assoc. 
1844 [1845], p. 308) Egerton Coll. 
P. 9454. Hinder part of similar small head. Egerton Coll. 
P. 1744. Hinder portion of larger head with remains of opercular 
apparatus, marked “ KJionchus n.s.” by Egerton. 
Egerton Coll. 
35057. Hinder portion of similar head with opercular apparatus. 
Purchased, 1861. 
P. 628. Hinder portion of cranium, apparently with crests worn 
^away, marked by Egerton as intended to be the type 
specimen of Phal acru s cyhioides, Agassiz (named in list 
in Eep. Brit. Xssoc. 1844 [1845], p. 308). Egerton Coll. 
• 
To Eothynnus may also probably be referred the vertebrae from the 
London Clay of Sheppey in the Eoyal College of Surgeons, named 
Thynnus toliapicus, E. Owen, Catal. Eoss. Eept. & Pisces (1854), 
p. 174, no. 697. The following are similar specimens :— 
36117. Three terminal caudal vertebrae ; London Clay, Sheppey. 
Purchased, 1861. 
38885. Three caudal vertebrae ; Sheppey. BowerhanTc Coll. 
P. 4300 a, P. 4301. Three caudal vertebrae ; Sheppey. 
Enni-sTcillen Coll. 
^ Apparently the same as a specimen in the Eoyal College of Surgeons, 
named Cariniceps compressus, E. Owen, Oatal. Foss. Eept. & Pisces (1854), 
p. 165, no. 663. 
