107 
NAUCEATES. 
This is an aberrant genus from the family of true Maekarels. The 
general form is round, but less slender than m the l^t-named fishes; 
and the head more blunt. A keel on the side near the tail, as in the 
Tunny. Separate spines in front of the single dorsal fin, and also m 
front of the anal fin. The ventral fins are thoracic. 
PILOT PISH. 
Gasterostms Ductor, 
Nauorates Ductor, 
Centronoie Pilote, 
Lwnteus. 
Cuvier. Willoughby; Appendix, 
pi. viii, f. 2. 
Jenyss; Manual, p. 365. 
Yarrell; Br. Pishes, vol. ii, p- 170. 
Gunther; Catalogue Br. Museum, 
vol. ii, p. 374. 
Lacepede. Eis.so. 
In remote times a usual method of classifying animals, and 
especially fishes, was by arranging together such as resembled 
each other in habits, or that were found to frequent similar 
situations; hut from such a system it often happens that we are 
involved in confusion and doubt, when we endeavour to ascertain 
the species to which had been applied a particular and perhaps 
obscurely discriminating name, or manners which it share wit 
several others. This remark is especially applicable to the Pilot 
Pish, which at a remote date attracted notice under the name 
of Pompilus; but which became confounded with another fish, 
of a different shape, and that in modern classification stands 
under the generic name of Centrolophus, or Black Fish, and 
assumes to itself the specific denomination formerly applied to 
the Pilot Fish. There is still another species which bore a 
name of similar meaning, and of which a greater degree of 
uncertainty exists; to which we shall find further occasion to 
refer at the conclusion of our history ol the present species. 
