304 
ACTINOPTERYGII. 
but smooth in the caudal region. The squamation is too 
much disturbed both dorsally and ventrally to exhibit the 
precise form and proportions of the trunk. Egerton Coll. 
P. 887. Small slab of Lias with imperfect clavicle and specifically 
indeterminable scales, labelled Eugnathus ornatus by 
Agassiz, and perhaps intended to be the type specimen of 
this undefined species (Poiss. Foss. vol. ii. pt. ii. 1844, 
p. 105); Lower Lias, Lyme Regis. Egerton Coll. 
P. 866. Fragmentary remains of small head and trunk, showing 
ceratohyals and vertebral axis ; Lower Lias, Lyme Regis. 
Egerton Coll. 
P. 1048. Abraded and imperfect small head and abdominal region ; 
Lower Lias, Watchet, Somersetshire. Egerton Coll. 
The specific names leptodus and mandibularis were also proposed 
by Agassiz for forms of Eugnathus to which there is now no clue 
(Poiss. Foss. vol. ii. pt. ii. 1844, p. 105, names only), from the 
Lower Lias of Lyme Regis. 
The so-called Pholidophorus elongatus (A. Wagner, Abh. k. bay. 
Akad. Wiss., math.-phys. Cl. vol. ix. 1863, p. 664) from the Litho¬ 
graphic Stone of Solenhofen, is also probably a species of Eugnathus. 
The type specimen is in the Palaeontological Museum, Munich. 
Genus HETEROEEPIDOTUS, Egerton. 
[Figs. & Descript. Brit. Organic Remains, dec. xiii. (Mem. 
Geol. Surv. 1872), no. 2 ] 
Syn. Brachyichthys, T. C. Winkler, Descript. Poiss. Foss. Solenhofen 
(Natuurk. Yerhandl. Holland. Maatsch. [2] vol. w. 18(^lj^p. 47. 
Eulepidotus, Sir P. Egerton, Quart. Joufn. Geol. Soc. vol. xxiv. 
/C$~9~6 
- 
Eugnathus , but having the 
trunk more deeply fusiform, the marginal teeth relatively smaller, 
and ossified hemivertebrae present in all but the smallest species.. 
Principal flank-scales serrated, usually not pectinated. 
(|jl\ 
Heterolepidotus la£txs, Egertqn. V * 
1834-35. Dapedius fimbriatus , L. Agassiz, Poiss. Foss., Feuill. p. 9, and 
vol. ii. pt. i. p. 196. 
1 Withdrawn in 1872, loc. cit., Sauvage having named typical species of 
Lepidotus “ Eulepidotce" in 1867 (Catal. Poiss. Form. Second. Boulonnais, 
p. 20). 
1868, p. 505 h 
s%' M 
A genus scarcely distinguishable from 
