392 Messrs. Playfair and Letourneux on the 



17. Barhus callensis. 



Barbus callensis, Cuv. & Val. xvi. p. 147 ; Guicli. Expl. Sc. Alg. Poiss. 

 p. 93 ; Giinth. Fish. vii. p. 92. 



D. g| ; A. I ; L. lat. 42-48 ; L. transv. 



lo-u* 



Four barbels ; no pores or tubercles on snout. Third dorsal 

 ray very strong and deeply serrated^ much shorter than length 

 of head. &ix longitudinal series of scales between the lateral 

 line and root of ventral. Height of body nearly equal to 

 length of head, and rather more than a quarter of the total 

 length without caudal. Eye considerably in advance of mid- 

 dle of head ; cleft of mouth subterminal ; upper jaw slightly 

 the longer ; lips thin ; anal twice as high as broad. 



Hal). Throughout Algeria. River Tajo, Spain. 



18. Barhus setifensis. 



Barhus setivimetms, Cuv. & Val. xvi. p. 149; Guicla. Expl. Sc. Alg. Poiss. 

 p. 93 ; Giinth. Fish. vii. p. 99. 



D. g ; A. g ; L. lat. 42 ; L. transv. J35i2' 



Four barbels ; no pores or tubercles on snout. Third spinous 

 ray feehle and much less strongly serrated than in B. callensis. 

 Five longitudinal series of scales between lateral line and 

 ventral. Height of body equals length of head, and is con- 

 tained 3f times in the total length, without caudal. Eye 

 much in advance of the middle of the head. Lips thick ; 

 upper jaw prominent. Caudal forked, lobes rounded ; anal 

 twice as high as broad. Entire body and tins generally co- 

 vered with a thick mucus. 



Hal). Setif ; artesian wells near the salt lake of Miserguin ; 

 Oued Tafna ; Bou Farik, near Algiers. 



M. Guicli enot* has noted a third barbel {B. longiceps) as 

 existing in Algeria. This species was named by M. Valen- 

 ciennes from a specimen brought frotn the Jordan ; and se- 

 veral examples from the Lake of Galilee exist in the British 

 Museum. 



M. Guichenot asserts that it is found in the thermal spring 

 of Hamam Meskoutin, where it lives with the Barhus cal- 

 lensis. We have examined a large series of specimens from 

 that locality, but we have found none which can be identified 

 with the species from Palestine. We have noticed consider- 

 able variations in both the Algerian species, especially in the 

 strength and serrature of the third dorsal ray, but we have 

 found one character invariable in each. In B. callensis there 

 iire always six longitudinal series of scales between the lateral 



* Explor. Scieu, de I'Alg. Poiss. p. 94. 



