Part ITI.—Twenty-fourth Annual Report 
NT 
“NI 
Fam, Esocip&. 
Genus sow. 
Esox lucius, Linn, The Fresh-water Pike. PI. iii. B., fig. 60; pl. v., 
fig. 20. 
The fresh-water pike from which the earstones represented on pl. iii. B. 
were obtained was of moderate size, but its length has not been recorded. 
“There were three otoliths of moderate size in each ear-chamber, and one 
or two smaller ones. The largest stones measured about 9mm. in length 
by 5mm. in greatest width. They are very irregular in outline, especially 
along the upper margin and round the (?) anterior end. The lower 
margin is tolerably even and slightly arcuate ; the anterior end is broad 
and deeply notched, aud the anterior portion of the upper margin, which 
is nearly straight, is separated from the posterior portion by an abrupt 
break in its continuity—this latter portion being narrow, and tapering 
gradually to the pointed distal extremity. One of the other two stones is 
narrow and elongated, and fully 45mm. in length; the third stone is 
small and subtriangular in outline, as shown in the photograph. 
Fam, CyPRINID&. 
Genus Lewciscus. 
Leuciscus rutilus (Linn.). The Roach or Braise. Pl, iii. B, fig. 59; 
pl. v., fig. 5. 
The earstones represented by fig. 59, pl. iii. B., are from a roach about 
54 to 6 inches in length. They are somewhat reniform in general outline, 
and the surface is ornamented with radiating grooves which terminate in 
the irregularly crenulated or jagged margins. They are about mm. 
across the widest part by about 3mm. in depth. The peculiar form and 
structure of these earstones are more obvious in the enlarged photographs 
on pl. v., fig. 5. They do not resemble any of the others described in 
this paper. 
Fam. CLUPEID. 
Genus Clupea. 
Clupea harengus, Linn. The Herring. Pl. iii. B., figs. 15-24; pl. v., 
figs. 3 and 4. : 
The earstones of a series of ten herrings of different sizes are repre- 
sented on pl. iii. B. The largest of the series (fig. 15) measured 123 
inches (about 314mm.) in length, and the smallest (fig. 24) about 125mm. 
In these earstones the lower margin, which is only slightly arcuate, is 
obscurely crenulated along the edge, but is otherwise unbroken; the 
upper margin is nearly straight and parallel with the lower, but its con- 
tinuity is interrupted by a distinct break near the middle, and in conse- 
quence of this break the anterior half of the earstone is very narrow, and 
only about half the width of the posterior portion. The posterior end is 
