182 GINGLYMODI. — PLEUROTREMATA. 



Lepidosteus tristoechus, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 189G, p. lll'j Meek, Publ. 

 Columbian Mus., Zool. v. 1904, p. 6'. 



Length of head 3 to 3^ in the length of the fish. Snout 1 j to If as long as the rest of the head. Dorsal 7-8. 

 Anal 7-8. 58 to 60 scales in a longitudinal series. 



Hah. Southern United States 2 3 4. North-eastern Mexico 234. Cuba i - ^. 



In Mexico recorded from Tampico in Tamaulipas. 



Here described from three specimens, 300 to 500 mm. in total length, from Mexico 

 and Cuba. The species is said to attain a length of 3600 mm. 



3. Lepidosteus tropicus. 



Atractosteus tropicus, Gill, Proc. Ac. Pliilad. 1863^ p. 172 ' ; Dumeril, Hist. Nat. Poiss. ii. p. 367 



(1870) ^ 

 Atractosteus bocourti, Dumeril, t. c. t. 22. fig. 1'. 

 Lepidosteus tropicus, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. Ill'; Everm. & 



Goldsborough, Bull. U.S. Eish. Comm. xxi. 1902, p. 139"; Meek, Publ. Columbian Mus., 



Zool. vii. 1907, p. 104°. 



Length of head 3* to 3i in the length of the fish. Snout 11- to 1| as long as the rest of the head. Dorsal 

 6-7. Anal 6-7. 51 to 54 scales in a longitudinal series. 



Hah. Mexico, Montecristo and Teapa in Tabasco-''; Guatemala, Huamuchal [Salvin) 

 and Eio Nagualate ^ 3 ; Nicaragua, Takes Managua and Nicaragua ^ ; Panama ^ 



Here described from two specimens, 450 and 500 mm. in total length. 



Sub-class II. SELACIill. 



Order I. EUSELACHII. 



Sub-order I. PLEUROTREMATA. 



Sharks, with the gill-openings lateral, 5 to 7 in number on each side, the last in 

 front of or above the pectoral fin. 



Fam. 1. CARCHAEIID^. 



1. CARCHARIAS, Rafin., 1810. 



Carcharias, Giinth. Cat. Fish. viii. p. 357 (1870). 



Curcharinus (Blainv., 1816), Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 33. 



Numerous species from tropical and sub-tropical seas. 



