PEKCID.E. 487 



D. 7 j 1/10-11. P. 15. A. 3/9-10. C. 15. L. 1. 26-28. L. tr. 3/12. 

 Length of head 4, height of body 2| iu the total length. Eyes 

 diameter 2| iu length of head, nearly | from end of snout, and 1 

 apart. Lower jaw the longer. Preorbital rather strongly serrated ; 

 two short spines directed backwards at the posterior-superior angle 

 of the orbit. Vertical margin of preopercle entire, except a few 

 serrations just above the angle, its double horizontal edge strongly 

 serrated, also the posterior half of the lower border of the inter- 

 opercle. Teeth a narrow band along the middle of the tongue. 

 Fins dorsal spines strong, the second longest ; second and third 

 anal spines of the same length, and almost equal to the third of 

 the dorsal fin. Lateral line continuous. Colour silvery, with 

 a burnished lateral band ; interspinous membrane dark between 

 the second and third dorsal spines ; a dark longitudinal band along 

 either Caudal lobe. 



Uab. Calcutta in fresh and brackish water ; Malabar coast and 

 Andamaus to the Malay Archipelago. 



633. (6.) Ambassis interrupta. 



Ainbassis interrupta, Sleeker, Bataoia Nat. Tijdsch. iii, 1852, p. 696 ; 

 Day, Fish. India, p. 53, pi. xv, fig. 5 (see synon.). 



D. 7 | 1/9-10. P. 13. A. 3/9-11. C. 18. L. 1.28. L. tr. 6/8. 



Length of head 3^, height of body 2| in the total length. Eyes 

 diameter 2| in length of head, | from end of snout, and -^ apart. 

 Lower jaw the longer. Preorbital with both its upper and lower 

 edges serrated. Anterior edge of orbit serrated, and two spines at 

 its posterior-superior angle. Vertical margin of preopercle entire, 

 the double edge of its horizontal limb serrated ; interopercle with 

 four denticulations at its angle. Fins second dorsal spine longest ; 

 third anal spine slightly the longest. Lateral line interrupted. 

 Colour silvery, with a narrow lateral band ; second dorsal spine 

 bright orange, the membrane between it and the third black ; a 

 dark longitudinal band along either caudal lobe. 



As in other species of this genus, the comparative length of the 

 highest dorsal spine varies with age. 



Sob. Sea at the Andamans and Batavia. 



634. (7.) Ainbassis dayi. 



Ainbassis dayi, Bleeker, Nat. Verh. d. Holland. Maats. d. Weten. 3de 

 Verz. Deel ii. no. 2, 1874, p. 95; Day, Fiih. India, p-;.f)4, pi. xv, 

 fig. 7 (see synon.). 



D.7 | 1/10-11. P. 16. A. 3/10. C. 16, L. 1. 30. L. tr. 4/ . 



Length of head 4|, height of body 3 in the total length. Eyes 



diameter 4 to 4 in length of head, | to 1 from end of snout and 



also apart. Snout pointed, lower jaw the longer. Vertical margin of 



