BY W. MACLEAY, F.L.S. 559 



D. 16. 2/15 ix-x. A. 2/15 ix-x. 



Teeth triangular, strongly compressed, close together. The 

 height of the body is five and a-half times to seven in the total 

 length, the length of the head four to five times. Lateral line 

 curved under the first finlet. Above bluish, beneath silvery ; back 

 and sides with numerous oblong, vertical, brownish spots. 



Port Jackson (Macl. Mus.) 



401. Cybium guttatum, Cuv. & Val. 



Cantor, Oat. p. 111.— Grunth., Oat. Fishes II., p. 371. 



D. 16/19-20 viii-x. A. 21-22 vii-viii. 



Teeth triangular and compressed. Height of body five times 

 in the total length, and about equal to the head. Above blue, 

 beneath silvery, back and sides with numerous brown spots and 

 longitudinal bands ; the greater part of the first dorsal fin black, 

 the remainder white. 



Port Jackson (Macl. Mus.) 



Genus Nauceates, Ouv. 



Body oblong, subcylindrical, covered with small scales ; cleft 

 of mouth moderate ; a keel on each side of the tail ; spinous 

 dorsal reduced to a few free spines ; finlets none ; ventrals thoracic. 

 Villiform teeth in the jaws, on the vomer and palatines. Seven 

 branchiostegals ; air-bladder small ; pyloric appendages in 

 moderate number. 



All Seas. 



402. Natjcrates ductor, L. 



Gunth., Cat. Fishes IL, p. 374. 



Naucrates Indicus, Less., Voy. Coq., Poiss., p. 157, pi. 14. 



''The Pilot Fish:' 



D. 3-6. 1/26-28. A. 2/16-17. Ciee. pylor. 12-15. Vert. 10/16. 



