ACANTIIOPTEaYGTANS. 129 



Gasterosteus ductor, L. ; Scomber ductor, Bl. 338, (Tlie Pilol-Fisli), 

 is blue, with broad vertical bands of a much deeper blue. The name 

 of Pilot-Fish owes its origin to the fact, that it follows vessels to 

 seize upon what may fall from them; and, as a similar habit is ob- 

 served in the Shark, it has been said that the former acts as a guide 

 or pilot to the latter ; it is not above a foot long. 



A black species is found at Brazil, the Ceixupira, Marcgr. 158; 

 Scomber niger, Bl. 337, which is eight or nine feet in length. 



Elacates : 



Have the general form of the Naucrates, and their free dorsal spines ; 

 but the head is horizontally flattened, and both the caudal carina and the 

 free spines before the anal are wanting*. <^ t \ 



LicHiA, Cuv. f~. fjf 



The Lichia have the free spines on the back, and two others, also free, 

 before the anal ; body compressed, and the tail without the lateral carinae. 

 In front of the dorsal spines is a single one, laid flat, and pointing for- 

 wards. 



Three species inhabit the Mediterranean, all of whi,cli are eatable, 

 and already well characterized by Rondelet. 



L. amia; Scomber amia, L. ; the Lichia proper, or V§4i(J0, Ron- 

 delet, 254; Amia, Salv. 121. The lateral line strongly covered or 

 forming an S ; a large species more than four feet in length, and 

 weighing a hundred pounds. 



L. glauca; So. glaucus, L. ; the Derbio, Rondel. 252. The 

 lateral line nearly straight; the anal and second dorsal marked with 

 a black spot in front ; teeth small and crowded. 



L. sinuosa, Cuv.; Rond. 255. (The Sinuous Lichia). The 



blue on the back separated from the silvery hue on the belly by a 



zigzag line; the hooked teeth in a single range f. 



Lacepede separates from the Lichia, by the name of Scomberoides, 



which is not very appropriate, those species where the last rays of the 



second dorsal and of the anal are divided into spurious fins, as in the 



Mackerels ;}:. The 



Trachinotus, Lacep. 

 From which his Acanthinions and Coesiomores do not generically 

 differ, are Lichia with an elevated body, and a more vertical profile, and 

 the dorsal and anal tapered into longer points §. 



* El.mntla, Cuv., Pedda mottah, Russel, 153; El. americana, Cuv., Centronotus 

 spinoaus, Mitch. Ann. cit. Nov. I, iii, 9, which is probably tlie Gasterosteus canaden- 

 sis, L. ; and some new species. 



t Add, Sromb. calcar, Bl. 336, f. 2. 



X Scomb. Forsteri, Bl. Schn., or Scoviberdide Commersonien, Lacep. II, xx, 3, or 

 Akenparah, Russ. U\;—Tolparah, Iluss. 138;— 5c. aculeatus, Bl. 336, \;—Sc. lysan, 

 Forsk.; — Sc. saliens, Bl. 335: and Lacep. II, xix; — Gasterosteus occidentalis, L., 

 Brown. Jam. xlvi, 2; — Quiebra-acha, Parra, xii, 2. 



§ Chcetodon glaucus, Lacep. 210, or Acanthinion bleu, Lacep. IV, 500; — Chat, 

 rhomboides, Bl. 209, or ylc. rtiomboidc, Lacep.; — Gast. ovatus,h., or Mookalee parah, 

 Russ. l5i;~C(esiomore Block, Lacep. Ill, iii, 2;— Scomber falcatns, Forsk.; — Casi- 

 omore baillon, Lacep. Ill, iii, 1; — Bollah-parah, Russel, 142. 

 VOL. II. K 



