224 PEBCID^. 



the former forming an obtuse angle. There are nine abdominal and 

 fifteen caudal vertebrae. According to the rule that the strongest 

 dennoneural or dorsal spines are supported by the strongest inter- 

 neurals, we find in this species the two anterior intemeural bones of 

 the dorsal fin and the two anterior of the anal very strong — the 

 former corresponding to the neural spines (processus spinosi) of the 

 second and tMrd abdominal vertebrae, the latter to those of the first 

 and second of the caudal portion. 



3. Ambassis urotsenia. 

 Bleek. Amb. 4- Cer. p. 267. 



The height of the body is 2| in the total length (without caudal 

 fin) ; the second spine of the first dorsal is 4| in the same length ; 

 the third anal spine longest, shorter than the second of the dorsal fin. 

 Yellowish, with a silvery lateral band; the first dorsal blackish 

 between the second and third spines; each lobe of the caudal fin 

 with a broad blackish longitudinal band. (Bl.) 



Seas of Amboyna and Wahai. 



4. Ambassis kopsii. 

 Bleek. Singapore, ii. p. 253. 



B.6. D.7|^. A.i^. L.lat. 27-28. 



The height of the body is nearly one-half of the total length 

 (without caudal fin). Orbit with a small spine, directed backwards, 

 at the posterior upper angle ; suboperculum entire, interoperculimi 

 sUghtly denticulated. Lateral line continuous; the second anal 

 spine rather longer than the third, but shorter than the second of 

 the dorsal fin. Yellowish, body and vertical fins minutely dotted 

 with brown ; the spinous dorsal with a rather broad black superior 

 edge. (BL) 



Sea of Singapore. 



5. Ambassis apogonoides. 



Sleeker, Borneo, iv. p. 200. 



B.6. D.7|^. A.^. L.lat.32. 



Head pointed, as in Apogon. The height of the body is 3^ in the 

 total length (caudal included), the length of the head 3^ in the same 

 length ; the diameter of the eye 3| in the length of the head ; the 

 upper profile of the head concave ; the upper maxillary bone reaching 

 to below the middle of the eye. Denticulations of the praeorbital and 

 prffioperculum very small, inconspicuous ; the second dorsal spine 

 longest, one-seventh of the total length, and half the height of the 

 body ; the first ray of the ventral fin rather elongate ; the second and 



