^34 
BUIvIvETIN OF THE BUREAU OF FISHERIES. 
Ckondrostoma Agassiz. (PI. xxxii, fig. 5.) Proc. Biol. Soc. Wash., xxii, p. 210; Zool. Anzeiger, xxxvi, 
P. 477 - 
Cirrhina Cuvier. Proc. Biol. Soc. Wash., xxin, pi. in, fig. 8 (C. jullieni). The scales of four species 
of Cirrhina, obtained from the British Museum, are so distinct as to suggest that they can not all 
be truly congeneric. 
Scale much longer than broad (length 9, breadth 7 mm.) with broadly rounded apex and squared 
base; circuli fine, wanting in the apical field, where they are replaced by coarse tubercles; 
basal radii about a dozen, delicate, many incomplete; apical radii few and irregular; nucleus 
a short distance basad of middle (Cutch, F. Day) C. mrigala Hamilton Buchanan 
Scale slightly longer than broad, or about as broad as long. 
Scale 9 mm. long, broad; laterobasal comers distinct; nucleus considerably basad of middle; 
no basal radii; apical radii over 20, mostly well formed; circuli replaced by transversely 
elongate tubercles in the apical region covered by skin, but in the central region below this 
by vermiform markings C. chinensis Gunther (Haslar collection). 
Scale 5)4 mm. long, 4|4 broad; laterobasal comers distinct; nucleus very far basad; a few weak 
submedian basal radii; apical radii about eight, distinct, wide apart; apical circuli very 
distinct, wide apart, sloping toward the middle (Stimg-Strang, Paris Museum). 
C. jullieni (from type lot) 
Scale conspicuously broader than long (length 2^, width 3^ mm.); nucleus far basad; basal radii 
about 20, very short, submarginal; apical radii over 20, not or hardly converging; circuli 
absent in apical region, but a small amount of tuberculation; broad nuclear area with fine 
very irregular reticulation; probably latinucleate scales (Kushk, Afghan Boundary Commission. 
C. afghana Gunther 
The scales of Cirrhina are in general (excepting C. afghana) much like those of Osteochilus or Labeo. 
Thus, as regards the sculpture of the apical field, C. jullieni may be compared with Labeo 
chrysophekadion, while C. mrigala and C. chinensis may be compared with Labeo sindensis, etc. 
May we not suppose that the groups of Osteochilus and Cirrhina have arisen from different groups 
of Labeo? 
Cosmochilus. I have a lateral line scale of C. fakifer, a very large fish from Sarawak, Borneo (C. Hose; 
B. M.). The scale is of the quadrate type, strongly orange tinted, about 20 mm. long and broad; 
lateral line canal bifid at the apical end; nuclear field extremely large, granular; basal radii very 
numerous, but wholly marginal and submarginal; apical radii very numerous, irregular, wavy; no 
circuli in apical field. C. harmandi from the Menam River, Siam (Royal Siamese Museum; B. M.) 
is represented by much smaller, pallid scales, about 7 mm. long and 6 broad, but of the same sub- 
quadrate form. Both basal and apical radii are fewer and more irregular, the basal longer, the 
apical wavy. Except for the size and minor details, the scales of the two species are wholly of the 
same type. 
Crossocheilos Bleeker. (Crossochilus auctt.) I follow the British Museum labels, but Day refers C. 
latia and C. reba to Cirrhina. The scales before me are separable as follows: 
Scales large and elongate (length about ii^ mm., breadth about 6 } 4 ), parallel-sided; circuli dense, 
those of the apical field transformed into tubercles in part, but toward the nucleus into vermi- 
form lines, and in the extreme apical region wholly wanting; nucleus only about 3 mm. from 
base; three or four distinct basal folds; apical radii numerous, more or less wavy, converging 
toward the middle; lateral radii delicate, variable, usually distinct (Madras, F. Day; B. M.). 
C. reba (Hamilton Buchanan) 
Scales smaller and much less elongate i 
1. Scales evidently longer than broad 2 
Scales not or little longer than broad 3 
2. Basal margin gently convex, not wavy; laterobasal corners more rounded; basal radii very few 
and feeble; apical radii numerous, parallel; scale (not adult) about 5)4 mm. long and 4 broad 
(Simla, F. Day; B. M.) C. faifa (Hamilton Buchanan) 
Basal margin wavy or broadly crenate; laterobasal comers sharper; basal radii very irregular, 
but distinct; apical radii numerous, many imperfect; nucleus about ijf mm. from base; 
scale about 7 mm. long and 6 broad. (Java; B. M.) C. oblongus 
3. Nucleus less basad mm. from base in seale 5 mm. long and fpf broad); middle interradial 
(apical) region strongly tuberculate (Ningpo, F. W. Styan; B. M.) S. styani Boulenger 
Nucleus more basad; middle interradial region not tuberculate (Cashmere, T. C. Jordon; B. M.) 
C. barbatulus 
