rACHYCORMIDJE. 
389 
cranium has not hitherto been observed. One of the finest known 
specimens, in the Moore Collection, Hath Museum, was obtained 
from the Upper Lias of Ilminster, Somersetshire. 
Form. Loc. Upper Lias: Baden and Wiirtemberg; Yonne, 
France; Yorkshire and Somersetshire. 
P. 7572. Imperfect fish, lateral aspect and partly in counterpart, 
about 076 in length, and wanting the greater part of the 
caudal fin; Ohmden, Wiirtemberg. The characteristic 
operculum of the right side is shown in position, while 
that of the left side is displaced to the ventral border of 
the abdominal region. The dorsal and anal fins are 
displayed in their natural position, and the tolerably 
well-preserved squamation is remarkable for the number 
of series in which the exposed portion of the scale is much 
broader than deep. Egerton Coll . 
P. 3731. Imperfect head and abdominal region of a larger speci¬ 
men, ventral aspect, noticed by Agassiz, loc. cit., under the 
name of Eugnathus giganteus or Pachycormus giganteus ; 
Boll, Wiirtemberg. Enniskillen Coll. 
P. 2040. Imperfect head and pectoral fins ; Wiirtemberg. 
Egerton Coll. 
P. 2042. Head and displaced pectoral fin ; Ohmden. Egerton Coll. 
P. 3709. Imperfect small head and pectoral fins, with remains of 
abdominal region, labelled Pachycormus latirostris by 
Agassiz ; Whitby, Yorkshire. Enniskillen Coll. 
P. 3708. Crushed and imperfect head, labelled Pachycormus lati¬ 
rostris by Agassiz ; Whitby. The solid rostrum is shown 
with its marginal teeth ; and the left operculum is well 
displayed. Enniskillen Coll. 
P. 2039, P. 4280. Fragmentary remains of large head and pectoral 
fin, in counterpart; Whitby. Egerton Sf Enniskillen Colls. 
P. 3709 a. Pectoral fin; Whitby. Enniskillen Coll. 
P. 5954. Imperfect mandible; Ohmenhausen. Purchased , 1889. 
P. 3719 b. Small trunk apparently of this species, displaying the 
dorsal and anal fins ; Ohmden, Wiirtemberg. The spiral 
intestine is beautifully exhibited by its coprolitic contents, 
Enniskillen Coll. 
