98 coxTRir.rrr'vs IETB AMKIIICAX ICHTHYOLOGY iv. 



;ui(l below the caudal peduncle. Anal I'm comparatively short, and rap- 

 idl\ Jin-ravin- in height lor I lie lirsl liall'ol' its length : it lias IL'-L'D* rays. 

 Yeiilrals rounded, and each has 1 simple and S branched rays. Pec- 

 :l tins with a sharp spine, of dilleivnt forms in the different species. 

 Vent at >ome distance in advance of the anal. Lateral line c ..... plete. 

 In or aliove the a\il of the ]iec;oral tins is an orifice, \vhich is the open- 

 ing of the duct of a poison "land. u From it may frequently be drawn a 

 solid uelat iii'ius style ending in a tripod, each limb of \vhich is dichoto- 

 mon>ly divided into short branches of regular len^ih." (Cope.) Si/e 

 small. Fresh \vaters of the United States. (vwro?, back; of> ( , tail ; 

 "means tail over the back", 



' I'rcniaxillary hand of teeth without lateral l:i:'k\v:inl processes. 



Bleeker.) 

 1'. < -roral spin.- en! ire or grooved In-hind; adipose fin high and coutiiiuous with 



I In' caudal. 

 a. IVctoral spine aoout half the length of the head. 



81. N. ffyrinus(Mitchill)Kaf. 



Nearlyuniform yellowish brown, .sometimes blackish, without trans- 

 verse blotches: ;i narrow dark lateral streak and one or more dorsal 

 ones. liody com]aratively short and thick. Head lan;e, its width ^- 

 1 in length of body ; depth 4V,; head .'5.1 i. Spines stout and raiher 

 Ion- ; that of the pectoral lin straight, grooved behind, i'. 1 , in the distance 

 from snout to dorsal tin. Dorsal higher than lon.^. inserted nearer anal 

 than snout. Anal ]'.\. ,Iaws nearly equal. I lumeral jn-ocess short. L. 

 ." inch.-. \cw York, entire Mississippi Valley, and Upper Lake region; 

 rather common. 



rinw Mitchill, AMUT. Month. Mag. 1-1 -, :'.'JJ : .Ionian, Bull. U. S. Nat. 

 ^. .. L02: A'<i//ir*Ni',//;, .Jordan. I'.nll. 1'. S. Nat. Mns. \. |n.. 1-77.) 



P bora! .spiin- less than onr-lhird the length of the head. 



Color \ellowish, sitinewhat mottled. Uody slender. Head small and 

 n ii TO\\. lon-er than bi'oad. I^ye small. rp|>er jaw much ])r<)jectin^. 

 Spine- very short and slender; that of the dorsal not one-third the 

 height Of the fin J all less than one third the length of the head; that 

 of i he pectoral ret rorsely serrate on the outer ed-e, cut ire within. Head 

 I . in bod\ : ilsuidili 5J| depth :,\; distance to dorsal L",: pectoral spine 



! :!,, :iccunnt ol'iliis laini l\ I lie ni.linient ai \ ra\sa1 the front of I he 

 anal an- included in the enumeration. 



[chthyologiffl An-hipelagi Indici I'n.ilroaiiiN. i.'Silnri, 'JfvS : type Silitrits 

 <J!/rin Mitch, i.sr/u//", another gentU of Hilurirtiv; ciJof, like.) 



