PACHYCORMIDiE. 
379 
Euthynotus milloti (Sauvage). 
1891. Parathrissops milloti , H. E. Sauvage, Bull. Soc. Sci. Yonne, 
vol. xlv. pt. ii. p. 37, pi. i. fig. 1, pi. ii. figs. 1, 3. — 
Type. Imperfect fish, wanting caudal fin. 
The type species of the so-called genus Parathrissops , attaining a 
length of about 0-25. Length of head with opercular apparatus 
equalling the maximum depth of the trunk and contained about 
four-and-a-half times in the total length to the base of the caudal 
fin. Distance between the pelvic and anal fins twice as great as 
that between the former and the pectorals; dorsal fin with 15 or 
16 rays, arising slightly in advance of the anal, which comprises 
34 rays. 
Form. Loc. Upper Lias: Y r onne, France. 
iSTot represented in the Collection. 
The following imperfect specimens appear to represent a species 
distinguished from the known forms by the more robust proportions 
of the trunk. So far as can be ascertained, the length of the head 
with opercular apparatus is about equal to the maximum depth of 
the trunk and contained four times in the total length to the base 
of the caudal fin. The dorsal and anal fins are arranged as in the 
type species, E. incognitas. 
19648-49. A much-fractured distorted fish, in counterpart, with 
upturned head, wanting the caudal fin ; Upper Lias, Boll, 
Wiirtemberg. The operculum exhibits fine tuberculations, 
and there is an apparently false suggestion of a peg-and- 
socket union in the ventral scales of the abdominal region. 
Purchased , 1845. 
P. 880. Hinder portion of head and greater portion of trunk, 
displaying the axial skeleton; Upper Lias, Okmden, * 
Wiirtemberg. Egerton Coll. 
19651. A more imperfect specimen ; Boll. 
Purchased, 1845. 
To Euthynotus may also be referred a small fish from the Upper 
Lias of Vassy, Yvonne, France, described under the name of Caturus 
cotteaui (H. E. Sauvage, Bibl. Ecole Hautes Etudes, vol. xiv. 1875, 
no. 1, p. 15, pi. i. fig. 1 : Bull. Soc. Sci. Yonne, [3] vol. vii. 
1883, p. 45; and Bull. Soc. Hist. Hat. Autun, vol. iv. 1891, 
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