SEMION OTID2E. 
147 
22525 . Remains of head and abdominal region, with the pectoral 
fin and some of the superficial ornament in impression; 
Boll. Purchased, 1848. 
P. 1563 d. Portion of squamation ; Boll. Egerton Coll. 
The following specimens bear the specific name of Dajoedius 
ovalis (Tetragonolepis ovalis, L. Agassiz, Poiss. Boss. vol. ii. pt. i. 
1836, p. 209, pi. xxi. fig. 3), and were also referred to the genus 
TEchmodus by Egerton (J. Morris, Catal. Brit. Boss. 1854, p. 317). 
They seem to differ only from D. joholidotus in the slightly more 
elongated form of the trunk, and are regarded as constituting 
a variety of this species by Quenstedt (Handb. Petrefakt. 1852, 
p. 203). 
P. 1563 a. Type specimen of D. ovalis described and figured by 
Agassiz, loc. cit .; Boll. Egerton Coll. 
P. 3572. Head and trunk of a fish about 0*22 in length, wanting 
the caudal pedicle and fin, labelled by Agassiz; Ohmden. 
EnnisJcillen Coll. 
P. 1563 e. Specimen 0*17 in length, chiefly shown as an impression ; 
Boll. Egerton Coll. 
P.3571. Impression of slightly larger fish, labelled by Agassiz; 
Ohmden. EnmsJcillen Coll. 
32448. Bine specimen about 0*145 in length to the base of the caudal 
fin, wanting the greater part of the fins; Upper Lias, 
Curcy, Normandy. The parietal, frontal, and squamosal 
bones are separate. Tesson Coll. 
Dapedius caelatus, Quenstedt. 
1858. Dapedius caelatus , B. A. Quenstedt, Her Jura, p. 226, pi. xxviii. 
figs. 1, 2. 
1860. Tetragonolepis caelatus, A. Wagner, Sitzungsb. k. bay. Akad. 
Wiss. p. 40. 
Type. Nearly complete fish; Tubingen University Museum. 
An elongated species, attaining a length of about 0*45. Length 
of trunk (exclusive of the caudal fin) one and a half times as great 
as its maximum depth, and the latter equalling thrice the depth 
of the caudal pedicle. Head with opercular apparatus occupying 
somewhat less than one-quarter of the total length of the fish; the 
external bones ornamented with very coarse rounded tubercles, 
usually fused into short rugae, which are directed nearly horizontally 
l 2 
