486 
ACTINO PTERYGII. 
of the fish ; caudal pedicle slender, its width equalling two-thirds 
the depth of the flank-scales in the middle of the abdominal region. 
Pelvic fins arising midway between the pectorals and the anal; the 
latter fin arising slightly behind the middle point between the pec¬ 
torals and the caudal. Scales smooth, not serrated. 
Form. Sf Log. Lower Kimmeridgian (Lithographic Stone) : Ain, 
Prance. 
P. 4691 h, C. Two fragments ; Girin, Ain. Purchased , 1884. 
Pleuropholis obtusirostris ? Sauvage. 
1883. Pleuropholis obtusirostris, H. E. Sauvage, Bull. Soc. Gdol. 
France, [3] vol. xi. p. 501, pi. x. fig. 2. 
Type. Hearly complete fish ; Lyons Museum. 
A small fish about 0*065 in length, possibly young of the pre¬ 
ceding species. Length of head with opercular apparatus about 
equalling the maximum depth of the trunk and contained five times 
in the total length of the fish ; width of caudal pedicle, scales, and 
arrangement of pectoral, pelvic, and anal fins as in P. thiollieri ; 
dorsal fin arising slightly behind origin of anal. 
Form, Log. Lower Kimmeridgian (Lithographic Stone) : Ain, 
France. 
P. 4691. Imperfect fish, wanting fins, but displaying the course 
of the lateral line along the inferior scales; Girin, Ain. 
Purchased , 1884. 
Pleuropholis Iieuardi ? Sauvage. 
1883. Pleuropholis lienardi , H. E. Sauvage, Bull. Soc. G6ol. France, 
[3] vol. xi. p. 501, pi. x. fig. 3. 
Type. Nearly complete fish; Verdun Museum. 
A species attaining a length of about 0*065. Length of head 
with opercular apparatus slightly exceeding the maximum depth of 
the trunk, and contained nearly five times in the total length 
of the fish; width of caudal pedicle equalling two-thirds the 
depth of the flank-scales in the middle of the abdominal region. 
Distance between origin of anal fin and that of the caudal scarcely 
exceeding half that between the former and the pectorals; dorsal 
fin arising slightly in advance of the anal. Scales smooth, not 
serrated. 
Form. Sf Loc. Portlandian : Dept. Meuse, France. 
Not represented in the Collection. 
