378 
ACTINOPTERYGII. 
the maximum depth of the trunk. Pelvic fins arising slightly 
nearer to the pectorals than to the anal; dorsal fin about as long as 
deep, arising opposite the middle of the anal. 
Form. Loo. Upper Lias : Wiirtemberg. 
P. 2044. Imperfect specimen about 0-3 in length ; Ohmden. 
Egerton Coll. 
P. 881 a. Imperfect head and abdominal region ; Ohmden. 
Egerton Coll. 
Euthynotus intermedins (Agassiz). 
1844. Thrissops intermedins, L. Agassiz {ex Munster, MS.), Poiss. Foss, 
vol. ii. pt. ii. p. 127, pi. lxvi. 
1848. Sauropsis intermedins, C. G. Giebel, Fauna der Vorwelt, Fische, 
p. 200. 
1860. Euthynotus intermedins, A. Wagner, Gelelirte Anzeig. k. bay. 
Akad. Wiss. vol. 1. p. 217. 
1875. Heterothrissops intermedins, II. E. Sauvage, Bibl. Ecole Hautes 
Etudes, vol. xiii. no. 5, p. 46. 
Type. Hearly complete fish ; Woodwardian Museum, Cambridge. 
A species about as large as the type. Length of head with 
opercular apparatus equalling one-quarter of the total length to the 
base of the caudal fin, and about equal to the maximum depth of 
the trunk. Pelvic fins much nearer to the pectorals than to the 
anal; dorsal fin much deeper than long, arising opposite the origin 
of the anal. 
This is the type species of the so-called genus Heterothrissops. 
Form, df Log. Upper Lias: Werther, Westphalia. ' l 
Not represented in the Collection. 
Euthynotus speciosus, Wagner. 
1860. Euthynotus speciosus, A. Wagner, Gelelirte Anzeig-. k. bay. Akad. 
Wiss. vol. 1. p. 216. 
Type, nearly complete fish; Palaeontological Museum, Munich. 
A species about as large as the type, characterized by the com¬ 
paratively robust proportions of the trunk and the forward position 
of the dorsal fin, which arises opposite or immediately in advance 
of the origin of the anal fin. 
Form. Sf Log. Upper Lias: Werther, Westphalia. 
not represented in the Collection. 
