ABRAMIDINES. 
797 
THE SPERLIN-BLEAK (sw. braxenlojan). 
SPIRLINUS BIPUNCTATUS. 
Fig. 197. 
Scales in the lateral line about 50 (44 — 52). Branched rays in the anal fin about 15 (14 — 16). Lateral line 
included between two black streaks; sides also marked with scattered black spots. Pharyngeal teeth compressed , 
hooked at the tip, with smooth masticatory surface, and set in two rows; 2, 5(4) — 4(5), 2. 
a 
Fig. 197. Spirlinus bipunctatus, Datural size. From the Lake of Zurich, a, left inferior pharyngeal seen from above, b, same bone seen 
from without, both figures twice the natural size; c , the middle tooth in the inner row, three times the natural size. 
9 6 
C. x + 1 + 17 + 1 + x ; L. lat ■ 44 — 5 2 ; L. tr. — 1 ; Vert. 38 — 40 c . 
4 
Syn. Cyprinus bipunctatus, Bl., Fisch. Deutschl., pt. I, p. 50, tab. 
VIII, fig. 1 ; Agass. {Aspius), Mem. Soc. Sc. Nat. Neuch., 
tom. I, p. 38; Cuv., Val. ( Leuciscus ), Hist. Nat. Poiss., 
tom. XVII, p. 259 ( + Leuc . Balclneri, p. 262); Bonap. 
( ALburnus ), Cat. Met. Peso. Ear., p. 33 ; G-thr ( Abramis ), 
Jahresb. Ver. vaterl. Naturk. Wurtemb., Jahrg. IX, p. 307 ; 
Hckl, Kn. ( Albumins ), Siisswasserf. Oestr. Mon., p. 135; 
Dyb., Cypr. Livl., p. 161; Sieb., Siisswasserf. Mitteleur., p. 
163; Blanch., Poiss. d. eaux douces Fr., p. 371; Feddersen 
{Aspius), Naturh. Tidskr. Kbhvn, ser. 3, vol. XII, p. 91; 
Bncke {Alburnus), Fisch., Fischer., Fischz. 0., TV. Preuss., 
p. 128; Fatjo {Spirlinus), Fne Vert. Suisse, vol. IV, p. 392; 
Lillj. {Abramis), Sv., Norg. Fn., Fislc., vol. Ill, p. 322. 
The Sperlin-Bleak never exceeds the average size 
of the common Bleak. According to Fatio it may 
attain in Switzerland a length of 15 cm.; but the 
ordinary length of adult specimens, including the whole 
caudal fin, lies between 10 and 13 cm. 
In form this species is deeper than the preceding 
one, and consequently shows greater lateral compres- 
sion, the greatest depth being at least about 1 / i d , the 
least depth about 1 / 11 % of the length of the body to 
the end of the middle caudal rays, and the greatest 
thickness (across the opercula) at most about 2 /s, on 
an average 36 %, of the greatest depth. 
In most other respects it resembles the Bleak; 
but the mouth does not ascend so sharply, and the 
“ Sometimes 17, according to Fatio; sometimes 18, according to Gunther. 
. 8 — 10 
0 — according to Fatio. 
3 — 5 
c According to Gunther and Fatio. 
d 24'7 % — 26‘7 % according to our measurements. 
e 8’8 / — 9’4 % according to our measurements. 
