72 Part III—Twenty-fourth Annual Report 
Earstones. 
Figure on the Length of the 
Plate. Fish. | 
Length. Width. 
Pd (1215 abig 15) 164 inches. About 6'5mm. | 4°5mm. 
3 . 14 5 | » osmm. | 40mm. 
4 5 113 ue » o0mm. | 3‘5mm. 
5 11 Btn { One 3‘5mm., other 
; 2? | <2 | B2 * ‘| _ rather less. 
32) (Pl is) 165'Omm. 5 OOM 2°5mm. 
33 5 87:‘0mm. | » 20mm. | 15mm. 
It will be noticed that while in the case of the first four the earstones 
are only about one-sixtieth or sixty-fourth part of the length of the fishes 
they belonged to, the earstones of the smaller fishes are proportionally 
larger, as in some other examples previously mentioned. 
Genus Platophrys. 
Platophrys laterna (Walb.). The Scald-fish. Pl. i. B., fig. 30. 
The earstones of a single example of the scald-fish are represented here. 
They are from a fish measuring 138mm. (about 54 inches) in length, and 
are of an oblong form. The posterior end is truncated, and there is a 
small notch at the anterior extremity. They measure about 3mm. long 
by about 2mm. in width. 
Genus Pleuronectes. 
Pleuronectes platessa (Linn.). The Plaice. Pl. ui. a., figs. 15-21. 
The earstones of seven examples of plaice, the length of which ranges 
from 610mm. (about 24 inches) to 64mm., are shown on pl. iil. a. The 
large pair have a tolerably massive structure, and are of an oval shape ; 
the posterior end is moderately broad and somewhat obliquely truncated, 
while the anterior end is tolerably narrow and rounded; the lower margin 
is evenly, but not very boldly, rounded or much thickened. The upper 
edge, which is thicker than the other, is moderately straight but of a 
somewhat irregular outline, and exhibits a shallow notch near the middle. 
They measure about 12mm. long by about 75mm. broad. They are thus 
about one-fiftieth part of the entire length of the fish. The other ear- 
stones represented by the photographs are from comparatively small 
fishes, the lengths of which, and of their earstones, are given in the 
annexed Table. 
Earstones. 
Figure on the Length of the 
Plate. (iii. A.) Fish. | 
Tee | Width. 
eS PENSE OF 3 i) otk aes et Eee 
16 287mm. About 65mm. | Nearly 4°5mm. 
17 273mm. , 62mm. | About 4°5mm. 
18 273mm. ny Ov Dyernan, = | 5, 40mm. 
19 160mm. , 4:O0mm. Seavert 
20 91mm. oe OUII. Se OID aa 
21 64mm. », 2°Omm. pe. WeGSseohTa || | 
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