. * .TKir.rrii'XS TO XOKTII AMERICAN ICHTHYOLOGY IV. 



$$ Maxillary nut slipping under pici.il.ital po-d -i iorly SI:I;I:AMH.I:, 80. 



7.7.7.7.. Anal spine- 1 to 10. 



< i \ i KAiinm.j. ,-1. 



\Y\V. Eyes superior: month nearly verti- 

 cal UlSAXOSCOI'lD^E, 10o. 



SS. Yomer without tceih. 



<:. 'I'ail with a strong spine on each side-; teeth inci.-or-like TEUTHYt>ID., 99. 



tin. Tail without spine. 



A. Anal preceded l.y '.' free spiii'-s ; gill meml-iancs five from istlimns. 



( AKANGIDJD, 75. 

 Hi. Anal without I'm- spim -. 



I., ill .-eiiiorni ; soft parts of vertical fins completely scaly ; liody eumprc . d 



mid elevated; anal s|iincs:{ or 4. 



</. I>or-al I'm continuous C'n.i. I DIM >\ i in.i;, '.i~. 



(/(/. lor>al I'm ilccjply notched EPIIIPPID^i, 97. 



i ii'i'i m. 

 ' . Lateral line ol.Milete. 



./'. (iill nicmlirancs joined to the isthmus GOBIIP.E, 104. 



.'/. < .ill memhranes free from the isthmus CENTIIAKCHID^;, 84. 



<> . Lateral line present. 



g. 1 'nrsal I'm without distinct spines; no anal spines ICOSTEID^E, 101. 



yr/. l)oi>al I'm with di.slinci .-pines. 

 It. Anal spines 1 or 2. 



i. Lateral line interrupted; no slit behind 'fourth gill. 



l'c\IA( I'.XTRID/E, 96. 

 ii. Lateral line comidete. extending to the tip of the caudal fin ; head 



scaly S( 1.1 XII..K, 91. 



til. Lateral line complete, extending to the base of the caudal. 

 j. I'pperjaw with posterior canines ; dorsal I'm continuous. 



TKACIIIMH.K. I"-.-. 



.//. rpjKT.jaw without canines ; dorsal fins 2 l'i:i:ri !>.!:. 65. 



7i/i. Anal s]iincs I!. 



i. Anal with more than 1.". .-of| rays. 



/. rrc(.perele en i ire T.Mr.ioKicii'.r.. !>::. 



//. 1'leojiei-cle senate STHOMATK1UJE, 77. 



ii. Anal with less i hau !."> soft rays. 

 /,. 1 tor.-al s]iines '. or 10. 



/. ( 'hecks and opercli -s scaly Ori:i:n> r. 'J-J. 



//. ( 'hei'ks and opercles chielly naked LAIHM i>.r, '.'.">. 



/./,. 1 >orsal spines 1 1 to 1.".. 



>n. I'pper jaw with posterior canines LAIUMIM:. 95. 



mm. I'pprr jaw without ].o-tnior canines. 



" .Taw.s with incisors or molars, or hot h Pr AI:II>.K. fS. 



' ,la\\s \\ ii h i loin ted teeth only l'i:ivi in .MATH >.!;, -?. 



/.'./.-. 1 >'.i-:il .-pin. , 17 or more ; anterior teeth cnnini'-like. 



I. \i'.i:ii..T. 95. 



llli. Anal spines i! Cirm.ii >.!:, 94. 



\ < ntial lavs more than 1. .".. 



ii. Caudal I'm wanting: scales spinoiis. . MACnUHiD^E, 1'Jl. 

 ////. Caudal I'm well developed. 



"- Tail i-- real: \ cut rals jugular O.\i>n>r, 1'JO. 



UK. Tail diphyccrcal. 



ji. Ventral rajsiiliont 1."; dorsal nn single, levatol. 



, 80. 



