320 
JLCTINOPTERTGII. 
P. 860-1, P. 2023. A fine portion of the abdominal squamation, 
from Boll; and two imperfect heads with remains of the 
trunk and fins, from Ohmden, near Boll. Egerton Coll. 
22534. Imperfect head, pectoral fin, and anterior abdominal scales ; 
Boll. Purchased, 1848. 
19655-56. Greater portion of trunk in impression, and imperfect 
remains of another specimen preserved from the origin of 
the dorsal fin backwards ; Boll. There are no distinct 
traces of vertebral rings in the caudal region, although 
circumstances are favourable to the exposure of these if 
they were present in the second specimen. 
Purchased , 1845. 
P. 3690. Very imperfect but typical large specimen; locality 
doubtful, but labelled “ Lower Lias, Lyme Regis.” 
Ennislcillen Coll. 
Ptycholepis gracilis, Davis. 
1884. Ptycholepis gracilis, J. W. Davis, Ann. Mag. Nat. Hist. [5] 
vol. xiii. p. 335, pi. x. 
Type. Nearly complete fish ; J. W. Davis Collection, Halifax. 
A comparatively slender species of moderate size, the length of 
the head equalling the maximum depth of the trunk and contained 
nearly five times in the total length of the fish. Scales differing 
from those of the type species in the presence of a few feeble but 
conspicuous vertical folds of ganoine at the anterior overlapped 
border. 
Form. Sf Loc. Lower Lias : Dorsetshire. 
39864. Remains of a much abraded small head and trunk with 
pectoral fins ; Lyme Regis. Purchased , 1866. 
P. 4242. Much crushed remains of a large trunk with paired fins: 
Lyme Regis. Two of the enlarged pelvic scales are shown. 
Ennislcillen Coll. 
P. 859. Imperfect remains of a large specimen doubtfully of this 
species, probably referred to by Egerton, Pigs. & Descript. 
Brit. Organic Remains, dec. viii. (Mem. Geol. Surv.), no. 8, 
p. 3; Lyme Regis. The detached left suboperculum, 
exposed from the inner aspect, exhibits no ascending 
anterior process. Egerton Coll. 
