PLKURONECTID.E. 
609 
palatine. Eyes generally on the right side. Both pairs of fins 
present, symmetrically developed ; dorsal fin arising above the eye ; 
caudal fin separate, rounded behind. Scales very small or 
absent. 
Range at present throughout the temperate and arctic seas of 
the northern hemisphere. 
The following specimen appears to be identical with the corre¬ 
sponding bonf* of the existing Fleuronectes platessa, Linn.:— 
P. 8739. Left maxilla, described as referable to Platessa sp. by 
E. T. Xewton, Yert. Eorest Bed (Alem. Geol. Snrv. 1882), 
p. 128; Eorest Bed, Overstrand, Yorfolk. Savin Coll. 
An otolith described as follows, probably belongs to this genus, 
but is not represented in the Collection :— 
OtoJithus {Platessa) sector., E. Koken, Zeitschr. deutsch. geol. Ges. 
vol. xl. (1888), p. 292, pi. xvii. figs. 14-16, and ibid. 
vol. xliii. (1891), p. 105, pi. i. fig. 4.—Lower Oligocene; 
Westeregeln and Osterweddingen, Germany, Also Lower 
Tertiary, Alabama. 
Genus SOLEA, Cuvier S’, 
[Eegue Animal, vol. ii. 1817, p. 223.]^^-^- 'iS. 'Of-I 
Mouth small and unsymmetrical, twisted round to the left (blind) 
side : teeth minute and villiform, confined to the left margin of the 
jaws. Eyes on the right side, the upper being more or less in 
advance of the lower. Abdominal vertebrae with very small trans¬ 
verse processes and rudimentar}^ ribs, but most of them with long 
and robust haemapophyses. Both pairs of fins usually represented, 
but often unsymmetrical and one sometimes Mbsent; dorsal fin 
arising on the snout; caudal fin separate, roundi'd behind. Scales 
very small, antero-posteriorly elongated, deeply overlapping, and 
ctenoid. 
Existing species occur in all temperate and tropcal seas, and a 
few inhabit freshwaters. 
Solea kirchbergana, Meyer. 
1848. Rhombus kirchberganus, H. von Meyer, Neues Jahrb. p. 782. 
1851. Solea kirchbergana, H. von Meyer, Palseontogr. vol. ii. p. 102, 
pi. xvii. figs. 2, 3. 
1856. Solea kirchbergana, H. von Meyer, ibid. vol. vi. p. 25, pi. i. fig. 3. 
1883. Rhombus kirchberganus, F. A. Quenstedt, Ilandb. Petrefakt, 
ed. 3, p. 370, pi. xxix. figs. 2, 3. 
p.vRT IV. 2 a 
