EUGN'ATHIDJE. 
333 
1863. Caturus microchirus, A. Wagner, Abh. k. bay. Akad. Wiss. 
math.-phys. 01. vol. ix. p. 703. 
1863. Caturus macrurus, A. Wagner, ibid. p. 706. 
1863. Caturus obovatus, A. Wagner, ibid. p. 707. 
1863. Caturus gracilis, A. Wagner, ibid. p. 707. [Variety in Palaeon¬ 
tological Museum, Munich.] 
1871. Caturus ferox, T. C. Winkler, Archiv. Mus. Teyler, vol. iii. p. 176 
pi. y. figs.’ 2, 3. 
Type. Nearly complete fish ; Royal Bohemian Museum, Prague. 
The type species, attaining a length of about 1 metre. Length 
of head with opercular apparatus about equal to the maximum 
depth of the trunk, and usually less than one-quarter of the total 
length of the fish. Caudal region tapering to a comparatively 
slender pedicle, its depth little, if at all, exceeding one-third the 
maximum depth of the abdominal region. Teeth large, with very 
slender apex, and about 40 in total number in the dentary; depth 
of operculum somewhat exceeding its maximum breadth ; branchio- 
stegal rays about 24. Dorsal fin with about 20 rays, deeper than 
long, its depth equalling about one-half that of the trunk at its 
origin ; this fin arising in advance of the middle of the back, the 
distance from the occiput to its origin being equal to that from its 
hinder border to the base of the caudal fin. Pelvic fins arising 
opposite the front half of the dorsal fin; anal fin smaller than the 
dorsal, with from 12 to 14 rays. Scales smooth, or in part marked 
with a few feeble, short, transverse striae. 
Form, Loc. Lower Kimmeridgian (Lithographic Stone) : Bavaria, 
and (?) Ain, France. 
37024, 37026. Two fine specimens nearly 0-5 in length, in counter¬ 
part ; Solenhofen. The vertebral pleurocentra and hypo- 
centra are well developed, and the first specimen exhibits 
the large gular plate with about 21 branchiostegal rays. 
Haberlein Coll . 
P. 3726. Similar specimen; Solenhofen. Enniskillen Coll. 
49141. Plaster cast of large specimen (Palaeontological Museum, 
Munich) apparently elongated by crushing; Iielheim. 
Purchased, 1878. 
37028, 37034, 37038. Three specimens from 0*36 to 0*42in length; 
Solenhofen. The last specimen shows the atrophied 
upper caudal lobe. Haberlein Coll. 
37027. Imperfect fish 0*32 in length, in counterpart, with indica¬ 
tions of ossified pleurocentra and hypocentra ; Solenhofen. 
