Freshwater Fish of xUgeria. 301 



of the eye equals the leni^th ot" tlie snout, and is considerably 

 more than half the intrrorhital snaee ; it is contained from 3 

 to 3§ tinu's in the leni^th of the liead. (.)rigin of dorsal mid- 

 way hi'tween base of caudal and jiosterior margin of ])ra'o|)(M-- 

 culum ; it corresjtond?- to tlu- ideventh scale on the lateral line. 



Fcintde. Body grcenisli olive, with from nine to twelve 

 darker cross bands more irregular than in males. 



M<ih\ Greenish olive, with about eleven distinct lighter 

 cross bars. A black oetdlated sjxtt posterinrly on l)()th (h>rsal 

 and anal fins. Caudal with several indistinct interrupted 

 transverse bands, and a l)road whitish nuirgin. 



Length 3 to (5 centimetres. 



Hal). High Plateaux of Algeria. 



15. Carassius auratus. 



The common goldfisli, originally a native of China and 

 Japan, has been everywhere domesticated, and is found in 

 great numbers in the ()ued ]Malouia, near the confines of Mo- 

 rocco. Wi' have observed nearly every known variety of it : 

 in some the fins are normal ; in others the caudal is three- or 

 four-lobed ; sometimes the dorsal is reduced to a few rays, 

 and sometimes it is entirely wanting ; while every colour, from 

 bright golden to uniform blackish, and every combination of 

 those colours, has been observed. This fish was, no doubt, intro- 

 duced by the Moors long before the French occupation of Algeria. 



16. Leuciscus callensi's. 



Leuciscus calleiuiis, Guich. Expl. Sc. Alg. Poiss. p. 94, pi. 7. f. 2. 

 D. 10; A. 12; V. 8; L. lat. 45; L. transv. 10/4^. 



Body elongated, compressed, its greatest height being con- 

 tained 3^ times in the total length, without caudal. The 

 head is 4 times in the same. Cleft of mouth oblique, lower 

 jaw slightly prominent, intermaxillary reaching to anterior 

 margin of orbit. The attachment of the branchial membrane 

 takes place behind the posterior margin of orbit. Pharyngeal 

 teeth in a single series on each side, slightly hooked, 5 . 5. 

 Belly behind ventrals compressed, covered ivith scales. Three 

 series of scales between the lateral line and the root of the 

 venti\als. Dorsal above the space between ventrals and anal. 

 Lateral line complete, considerably below the middle of tail 

 during the greater part of its course, but rising to the middle 

 at the root of the caudal. Colour : blackish above, minutely 

 punctulated with black ; a broad blackish band along the sides 

 above the lateral line. 



Length 3 inches. 



Hah. All the streams in the east of Algeria. 



30* 



