BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 24, AFD. IV. N:0 8. 17 
clude each other, for which reason this character, in the man- 
ner in which GÖNTHER states it, is of little value. I will, 
later on, return to this subject. (See below my remarks with 
regard to the different distance of the anal fin from the tip 
of the snout!) 
The latest discussion of the distinctions between these 
species is that of Professor Smitt, to be found in the second 
edition of the »Scandinavian Fishess. In his specific dia- 
gnoses he introduces, beside two of the above-mentioned 
characters, those relating to the preopercular spine and the 
different length of the innermost ventral ray, the two follow- 
ing important distinctions between the species: In CO. gobio 
the distance between the anal fin and the tip of the snout, in 
adult specimens at least, is never less than 48 « of the length 
of the body, in C. poecilopus at most 47!/2 «, and in C. gobio 
the length of the base of the anal fin is less than 48 « of the 
distance from the tip of the snout and in C. poecilopus more 
than 50 »« of the same distance. 
| C. poecilopus. i; —C. gobio. 
| 45,21 57,5| 76,1 42,5) 5 
Q | 43,4] 62,7] 76,11 42,4/ 5 
Distance of the anal fin from the tip of | SEEK 43,3 45.71 45.4] 4 
the snout in & of the length of the body | 
19 | 48,4] 44,5! 45,4| 46,7) 47, 
Length of the body in mm. (average) . A 
It appears from the above table, which shows the aver- 
ages of the distance between the anal fin and the tip of the 
snout in proportion to the length of the body, that this dis- 
tance is greater in C. gobio than in C. poecilopus. The rea- 
son why Professor SMITT's maximum- and minimum-measure- 
ments do not agree with those I have obtained, may probably 
be that I have taken my measurements somewhat differently 
from what he has done. — But, on carefully comparing all the 
measurements, there appears to be great variations amongst 
them, and though the measurements in question are usually 
greater in C. gobio, we may, however, occasionally find some 
specimens of all ages in which the measurements are equal 
to or less than in specimens of similar age of C. poecilopus. 
JJ 
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