9. NAUCLEKUS. 469 



maxillary reaches to the vertical from the anterior margin of the 

 eye. Body with two blue longitudinal bands. 



Sea of Batavia ; Amboyna ; Keeling Islands ; New Guinea. 



a. Half-grown. Amboyna. Purchased of Mr. Frank. 



9. NAUCLERUS. 



Nauclerus, Cuv. 8f Val. ix. p. 247. 



Body oblong, compressed, covered with very small scales ; cleft of 

 the mouth narrow. The tirst dorsal continuous, with three to five 

 short spines ; the second dorsal and the anal are much more developed, 

 without separate finlets ; two spines before the anal, rather remote 

 from the remainder of the fin. The lateral line is not armed. The 

 teeth in the jaws form vilJiform bands, with some stronger ones an- 

 teriorly ; teeth on the vomer and the palatine bones. A more or less 

 distinct spine at the angle of the jyroiojyerculum. Branchiostegals 

 seven ; air-bladder present. Pyloric appendages numerous. 



Small fishes, inhabiting the high seas between the tropics in both 

 hemispheres. The species are httle known. 



1. Nauclerus compressus. 



Cuv. Sf Val. ix. p. 249. pi. 263. 



B.7. D.5|^. A.2|± 



The height of the body equals the length of the head, and is one- 

 fourth of the total ; the width of the interocular space equals that of 

 the eye. Prffioperculum with a strong spine at the angle, and with 

 a smaller one above and below. The height of the spinous dorsal is 

 one-ninth of that of the body ; the ventrals do not extend to the 

 vent. Body with seven blackish cross-bands, disappearing on the 

 belly ; the fourth, fifth and sixth extend on the soft dorsal, and the 

 two latter on the anal, forming spots ; each caudal lobe with a 

 blackish spot ; ventrals black. (C/wv.) 



Molucca Sea. 



2. Nauclerus abbreviatus. 



Cm-. Sf Val. ix. p. 251 ; Lowe, Proc. Zool. Sac. 1840, p. 36, and Tram. 

 Zool. Sac. iii. p. 3. 



I>-4U- A.2|^. 

 Praeoperculiun with four spines ; suprascapula with a strong spine. 

 The height of the spinous dorsal is one-ninth of that of the body. 

 Body with seven blackish cross-bands, disappearing on the belly; 

 the fourth, fifth and sixth extend on the soft dorsal, and the two 

 latter on the anal, forming spots ; ventrals black. 



Atlantic. 

 a-d. North Atlantic. Presented by J. B. Godfrey, Esq. 



