256 TRACHINlDiE. 



to the origin of the anal. The vcntrals are jugular, pointed, and 

 composed of one spine and five rays. 



The scales are exceedingly small, and nearly entirely hidden in 

 the pouches of the cutis. The lateral line is straight, very near the 

 dorsal line, and lost below the posterior half of the dorsal fin. 



The teeth in both the jaws are widely set, of moderate size, and 

 form a smgle series. 



The ground-colour is now yellowish-white, dotted and sprinkled 

 ■with bro^^^l. There is an ovate black spot between the seventh and 

 tenth dorsal rays. The interior surfiice of the maxillary is marked 

 with two black bands, which, at the posterior extremity of the bone, 

 pass on to the membrane in a strong curvature. There is a third 

 band at the outside of the membrane, running from the opening to 

 the middle of the mandibula. 



inches, lines. 



Total length 6 6 



Height of the body 1 3 



Length of the head 2 1 



Diameter of the eye 7 



Distance between the eyes 1| 



Greatest height of the dorsal and anal .... 9| 



Length of the caudal 11 



of the pectoral 10 



3. Opisthognathus cuvieri. 



Cuv. ^- Val. xi. p. 504. pi. 343. 



D. 28. A. 18. L. lat. 70. 



The upper maxUlary reaches beyond the vertical from the pos- 

 terior margin of the orbit. Scales small. The diameter of the eye 

 is 3| in the length of the head. A black ovate spot between the 

 fourth and eighth dorsal spines. 



Coast of Bahia. 



4. Opisthognathus solorensis. 

 Bleeker, Solor, p. 81 



D. 25. A. 16. L. lat. 65. 



The upper maxillary reaches to the angle of the praeoperculum. 

 Scales small. The height of the body is 6| in the total length, the 

 length of the head 4i. The dorsal fin with two black spots an- 

 teriorly. {Bl.) 



Sea of Lawajong (Island of Solor). 



5. Opisthognathus rosenbergii. 



Bleeker, Nias, p. 220. 



D. 24. A. 15. 



The upper maxillary does not reach to the angle of the prnooper- 

 cuhim. Scales .small. No black spot on the dor.sal. {BJ.) 

 Sea of Nias. 





