188 CTPRINID^:. 



6. LEUCISCUS. 

 Cuv. Regne Anim. ii. p. 194 (1817) ; Giinth. Cat. Fish. vii. p. 207 (1868). 

 Phoxinellus, Heckel, Russegger's Reise, ii. p. 1039 (1843) *. 



Body more or less elongate, more or less compressed, with rounded 

 or obtusely keeled belly ; scales large or small. Lateral line low down 

 on the body, median on at least the posterior part of the caudal peduncle. 

 Mouth moderate or rather large, without lips or barbels. Suborbitals 

 small, cheek naked. Dorsal fin without ossified ray, with 9 to 14 rays, 

 6 to 11 of which are branched, originating above the ventrals or a little 

 further back. Anal fin with 8 to 15 rays. Pharyngeal teeth conical, 

 more or less hooked, in one or two series (in a single series, 5 — 5, in the 

 African species). 



Europe, Northern and Temperate Asia, North-West Africa, and North 

 America. 



Two closely allied species in Algeria and Tunisia: — 



Anal III 9-10 ; Lat. 1. 43-48 1. L. callensis, Guich., p. 188. 



Anal III 7-8 ; Lat. 1. 37-43 2. L. chaignoni, Vaill., p. 189. 



1. LEUCISCUS CALLENSIS. 



Guichen. Explor. Sc. Alg., Poiss. p. 94, pi. vii. fig. 2 (1850) ; Playf. & Letourn. 



Ann. & Mag. N. H. (4) viii. 1871, p. 391. 

 Leuciscus {Phoxinellus) chaignoni, part., Chaignon, Bull. Soc. H. N. Autun, xvii. 



1904, pi. vi. figs. 5-6 ; Pellegr. in Gadeau de Kerv. Voy. Zool. Khroumir. 



p. 93 (1908). 

 Alburnus callensis, Bouleng. Ann. & Mag. N. H. (7) xvi. 1905, p. 46. 



Depth of body 3^ to 4 times in total length, length of head 3§ to 

 4 times. Snout rounded, as long as or shorter than eye, which is 3 to 

 3j times in length of head and equals interorbital width ; mouth oblique, 

 jaws equal in front. Gill-rakers few and short. Belly rounded. 

 Dorsal III 7, originating above the middle of the space between ventrals 

 and anal, and at equal distance from occiput or eye and from caudal, 

 border convex ; longest ray a little shorter than head. Anal III 9-10, 

 border slightly concave. Pectoral not quite reaching ventral. Caudal 

 forked. Caudal peduncle 1^ to 2 times as long as deep. Scales with 

 numerous radiating striae, 43-48 "^ " , 2-^—3 between lateral line and 



* The other very numerous generic names which should be included under Leuciscus 

 may well be left out here, as having no bearing on African Ichthyology. 



