376 
ACTIXOPTERYGII. 
Sauropsis latus, Agassiz. 
1832. Sauropsis latus, L. Agassiz, Neues Jalirb. p. 142. 
1833-34. Saurop)sis latus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 11; 
pt. ii. p. 122. 
1860. Sauropsis lata — Pachycormus elongatus (?), A. Wagner, Gelehrte 
Anzeig. k. bay. Akad. Wiss. vol. 1. p. 224. 
Type. Nearly complete fish; unknown. 
A large species, attaining a length of about 0*7. Length of head 
with opercular apparatus equalling about one-quarter of the total 
length to the base of the caudal fin, and not exceeding the maximum 
depth of the trunk. Pelvic fins arising slightly nearer to the anal 
than to the pectorals ; origin of dorsal fin opposite to, or even 
somewhat behind that of the anal. Scales exhibiting a few vertical 
wrinkles contiguous and parallel with the anterior margin. 
Form. <$f Loc. Upper Lias: Wiirtemberg and Baden. 
20658 a. Imperfect large specimen, wanting the caudal fin ; Boll, 
Wiirtemberg. Purchased, 1846. 
P. 3715. Imperfect trunk of a large fish, displaying part of the 
squamation ; Ohmden, Wiirtemberg. Enniskillen Coll. 
P. 2043. Imperfect specimen, about 04 in length; Boll. The 
marginal teeth are shown, while the form and proportions 
of the mandible, operculum, and suboperculum are indi¬ 
cated. Eyerton Coll. 
Genus PROSAUROPSIS, Sauvage. 
[Bull. Soc. Sci. Yonne, vol. xlviii. 1894, p. 4.] 
An elongated fish, differing from Sauropsis , according to the 
original description, merely in the non-extension of the anal fin, 
which has as short a base-line as the dorsal, and perhaps in the 
development of slight vertebral elements. 
Prosauropsis elongatus, Sauvage. 
1875. Pachycormus? elongatus, II. E. Sauvage, Bibl. Ecole Hautes 
Etudes, vol. xiv. no. 1, p. 23, pi. ii. fig. 1. 
1891. Aspidorhynclms colombi, II. E. Sauvage, Bull. Soc. Sci. Yonne, 
vol. xlv. pt. ii. p. 32 (name only). 
1894. Prosauropsis elongatus, H. E. Sauvage, ibid. vol. xlviii. p. 4, 
pi. i. (misprinted Protosauropsis ). 
Type. Imperfect fish, ventral aspect. 
The type species, attaining a length of about 0 5. Maximum 
depth of trunk about three times the width of the caudal pedicle, 
