2456 Bulletm 47, United States National Musejim. 



LyCODIN^ : 



a. Ventral fins present. 



6. Vomer -without teeth ; body scaly. 

 c. Palatines without teeth. 



d. Body very slender, the depth 12 to 16 times in length; lateral line 



short and faint, ventral in position. Embeyx, 932. 



dd. Body rather robust, 1 he depth 8 to in length; lateral line rather 



faint, lateral in position. Lycodopsis, 933. 



ec. Palatines with teeth; lateral line distinct, running along middle of side. 



Aprodon, 934. 

 66. Vomer and palatines with teeth. 

 e. Lower jaw without barbels. 



/. Dorsal fin without sculptured scutes at base. 



g. Body rather deep, the depth 6 to 8 times in the length. 



h. Body more or less scaly. Lycodes, 935. 



hh. Body entirely naked, or with a few scales on tail only; 

 none on body or fins. Lycodalepis, 936. 



gg. Body more slender, the depth 12 to 30 in the length; lateral 

 line lateral in position. 

 i. Pectoral fin with rounded outlines, the lower rays not 

 greatly produced. Lycenchelts, 937. 



a. Pectoral tin deeply notched, the lower rays much pro- 

 duced; lateral line ventral in position. 



FURCIMANLS, 938. 



//. Dorsal fin with the rays each provided with a sculptured scute or 

 appendage at base; no lateral line; body elongate. 



Lycodonus, 939. 

 ee. Lower jaw with many barbels: body slender, scaly. Lyconema, 940. 



aa. Ventral fins entirely wanting. 



GyMNELIN.'E: 



j. Teeth moderate, nearly uniform, on jaws, vomer, and palatines. 



A\ Body scaly; vomer and palatines with teeth; body compres.sed, not very 

 slender; skull cavernous. Bothrocara, 941. 



kk. Body scaleless. 



I. Lower jaw not very prominent; body very slender; gill openings 



very narrow. Gymnelis, 942. 



II. Lower jaw very prominent ; body slender, tapering behind ; scales 



undescribed. Lycocaba, 943. 



MELANOSTIQMATINiE : 



jj. Teeth long, unequal, on jaws, vomer, and palatines ; skin lax; gill openings 

 reduced to a small foramen ; body very slender ; scales obsolete. 



Melanostigma, 944. 



931. ZOARCES, Gill. 

 (Ekl-Pouts.) 



Enehelyopus, Klein, Ichthyologia Missus, iv, 52, 1747 ; not as restricted by Block & 



Schneider. 

 Zoarces, CuyiKR, Kfegne Animal, Ed. 2, ll, 240, 1829 {vivipa rus) . 

 Zoarchus, Swainson, Nat. Hist. Class'n Fishes, iI, 283, 1839 (vivipants). 

 Enehelyopus, Gill, Proc. Ac. Nat. Sci. Phila. 1863, 258 (viviparus) ; not of Bloch & 



Schneider. 

 Macrozoarcet, Gill, Proc. Ac. Nat. Sci. Phila. 1863, 258 (anguillaris) . 



Body elongate, compressed, tapering j)osteriorly ; head oblong, heayy, 

 narrowed above, the profile decurved; mouth large; teeth strong, conic, 

 bluntish, in 2 series in the front of each jaw and 1 series on the sides; 



