1. BELONE. 253 



caudal. Caudal fin forked. Scales very thin and deciduous, irre- 

 gular and small. 



Black Sea. 

 a. Fifteen inches long. From Mr. Millingen's Collection. 



This species is very similar to B. acus, but may be readily dis- 

 tinguished by its much larger teeth. 



40. Belone cancila. 



Esox cancila, Bxch. Ham. pp. 214, .380, pi. 27. fig. 70. 

 Belone graii, Sykes, Trans. Zool. Soc. ii. p. 367, pi. 0-3. fig. 4. 



cancila, Ciw. <$■ Val. x\\\i. p. 455 ; Bleek. Verh. Bat. Genootsch. 



xxT. p. 145 ; Day, Fish. Malabar, p. 166. 



D. 16-17. A. 17. Vert. 36/22. 



The free portion of the tail is compressed, deeper than broad. 

 The length of the head is two-fifths of the total (^dthout caudal) ; a 

 deep groove of moderate width runs along the middle of its upper 

 surface ; supercihary region smooth ; base of the intermaxillaries 

 depressed, maxillary two-thirds hidden by the praeorbital. Teeth 

 strong, widely set : vomerine teeth none. The diameter of the eye 

 is nearly equal to the width of the interorbital space, and two-fifths 

 of the length of the postorbital portion of the head. Body broad, 

 subcyhndrical, its depth being considerably less than the length of 

 the pectoral fin, which, again, is less than the distance of the oper- 

 cular margin from the orbit. Ventral fin midway between eye and 

 caudal : origin of dorsal fin opposite to that of anal. The middle and 

 hinder dorsal and anal rays subequal in length, short, the last ter- 

 minating at some distance from the root of the caudal. Caudal fin 

 subtruncate. Scales very thin and small. 



Indian Ocean. 



a, b, c, (l-f. Fine specimens. Ceylon. 



g. Adult : skeleton. Ceylon. Purchased of Mr. Cutter. 



41. Belone canciloides. 



Belone canciloides, Bheker, Nat. Tydschr. Ned. Ind. v. p. 454. 

 Mastacembelus canciloides, Bleek. Ned. Tydschr. Dterk. iii. 



D. 17. A. 17-18. 



The free portion of the tail is strongly compressed, deeper than 

 broad. The length of the head is two-fifths of the total (without 

 caudal). Base of the intermaxillaries depressed. The diameter of 

 the eye is one-third of the length of the postorbital portion of the 

 head, which is more than that of the pectoral fin. The first dorsal 

 ray is opposite the third or foiu-th of the anal fin. The middle and 

 hinder dorsal and anal rays short. Caudal fin subtruncate. Scales 

 small. 



Rivers of Borneo. 



a. One of the typical specimens, 11 inches long. From Dr. Bleeker's 



Collection. 



