GYMXOTID.K. 



125 



HI then order, and the G,,mmfuhc aud LeptocephalidcB in their 

 under orders, be considered as faniilies of the bwei o iS.i atio 

 The Gymnoudu: form an interesting family in the o?rW fp? 

 *;^o»,0, of which the '^''/^«./uW^ form the hi es f.,n.n ^ IT 



xaiencienues, and bj the voyage of the Bonite. The voyage of 



stpin "fnv l^ '■'*"™ °^f"y thanks to Professors Dumeril and Lichten- 

 stem, for the use of the materials existing in the Paris .nrl rI,! 

 Museums, .ithout which I could not have^i^omph^'e^c^^^^^^^^^^ 



lue eejs, but to the Sahnonoid abdommals, of which it constifntP^ 

 the east-organized family, and is an analogue of the eel^ The rays 

 of the pectora and anal hns, and when th'e caudal fin i^ present of 

 It also, are jomted or divided. pieseut ot 



It is composed of the following five genera :— 

 1. Sterxarchus (Schn.), having a small caudal fin 



^e^TT^f^tifii^IiJr"^ ' ''^■''' ™^"^'^ --^ 'y "- 



'■aSdr::i^^f -^^ '^^^ '-'-- -^'^ ^ -^ °^ P«"^ted teeth, 

 5. GvMNOTus, Linn. Destitute entirely of scales. 



Genus I. STEm AUGHVS, Schneider. 

 Diaffn.RnYing a small, normally-formed caudal fin 

 ^ili;'"i ^^^} ""'' ^^'^ premaxniaries and fore border of the man- 

 dible, winch form two clusters above, and two rows pointin^r Uck 

 wards below. No teeth on the symphysis. Head ancf borlvhueml ; 

 compressed. Head naked. Body scaly. On the midd e of the 

 dorsal aspect of the tail there exists a* thong, which, in he iiv no 

 fish, rechnes in a furrow wherein it is fixed by mucus * Anul 



eh^g^i ii^: ;S;,':nl:'"^' '- ''' -''''"' «- -^ ""^ ^""""'^'^ ->-. that . 



