LF.PXOLEPID^E. 
529 
caudal region. The length of the head with opercular 
apparatus is probably about equal to the maximum depth 
of the trunk, and is contained five times in the total length 
of the fish. The eye is remarkably large, as shown by the 
well-preserved sclerotic. The upturned mouth is bordered 
above by the very small premaxilla, and the long arched 
maxilla which bears minute teeth. The vertebral centra 
are about as long as deep, except towards the base of the 
tail, where they are somewhat longer. One of the haemal 
spines is seen to be considerably expanded. The origin of 
the anal fin is distant 0*145 from the pectorals and 0*09 
from the caudal fin. Fox Coll. 
46319. Trunk about 0*51 in length, wanting head and caudal fin; 
Purbeck Beds, Swanage. The specimen is very imperfect, 
but the dorsal fin is shown to arise opposite the origin of 
the anal, which has at least 23 rays. There seem to be 
remains of intermuscular bones below the vertebral column 
in the caudal region. Cunnington Coll. 
P. 4535-36. Two imperfect examples of a small species with 
remarkably short and deep abdominal vertebrae ; Purbeck 
FftrCf- Beds, Swanage. Enniskillen Coll. 
S^/,.u?3. /?'?,//- / 3 <?, / 3 ^. 
44845. Imperfect head and trunk of the same species : probably 
from Swanage. The preoperculum exhibits a few radiating 
ridges, and the quadrate shows a long hinder process to 
grasp the symplectic. The pelvic bones and fins are well- 
preserved ; while the dorsal fin, with fan-like foremost 
support, arises opposite the origin of the anal. As in the 
three preceding specimens, there seem to be remains of 
intermuscular bones below the vertebral column in the 
caudal region. 
Presented by Benjamin Bright, Esq., 1873. 
Fragment of trunk showing characteristic ribs; Purbeck 
Beds, Swanage. Egerton Coll. 
The so-called Tlirissops propterus (A. "Wagner, Abh. k. bay. 
Akad., math.-phys. Cl. vol. ix. 1863, p. 735) from the Lower 
Kimmeridgian (Lithographic Stone) of Eichstadt, Bavaria, seems to 
be a species of Leptolepis. The type specimen is in the Palaeonto¬ 
logical Museum, Munich. 
According to the original description, the genus Eurystethus 
(H. E. Sauvage, Bull. Soc. Geol. France, [3] vol. vi. 1878, p. 629) 
kRx.e PA r\ 
P. 1121. 
