13G COM'KII'.I IIONS TO NOUTII AMERICAN ICHTHYOLOGY IV. 



(Eaf.) Jordan. 5/M>d Mnii,t; ,v//-<>></ 

 IJnily obl.mg, liulc comprei-d. tin- young nearly terete, the adults 

 deeper bodied; the dorsal region not elevat<-il. Depth about -i in 

 len-tli, varying iVoin about ." in adults to 1] in the young. Head not 

 very lar-e. l\ in length of body (t',-1.1)? i">t specially depressed. .Mu- 

 cous poivs rather strong. Kye small, ."">-'> in head. Mouth quite interior, 

 horizontal, rather small. Scales large, firm, regularly and smoothly 

 unl.rieated. in -Hi (tl-47) longitudinal series and 13 (lU-l-l) transverse 

 series, the scales uot crowded forwards. Fin -rays usually: D. 1_: A. 

 7; V. '.. Coloration dusky above, with usually a black blotch be- 

 hind the dorsal iin. Each scale along the sides with a small, more or 

 less di.siinct blackish spot at its base, these spots forming interrupted 

 longitudinal lines, along the rows of scales. These lines are usually 

 very distinct, especially in the adult, but young specimens often shmv 

 them faintly. Sides and belly silvery, with a coppery lustre. Sexual 

 peculiarities moderately marked; very old males with the head covered 

 with small tubercles in spring. No great changes with age, either in 

 form or coloration. Size large 4 ; maximum length about 18 inches. 

 Great Lake region to South Carolina and Texas. 



(Catostoiiuix melanops Kat'. IHitli. <>h. HJO, 57: Calnxlnntux fnxt'iittux (.Jiintla-r, vii, 19; 

 Jordun, Man. V.TI. :'-H; .Ionian, Dull. LI. S. Nat. Mus. xii, i:i>.) 



68. MOXOSTO.TIA Kafn 



L'cd Horse. 

 (ritjchostomus Ay. ; Tcrclulux ll-.ii'.) 



(H:itini'si|iii', Iclilh. Ob. lfe'^0, .'>!: lyiif f'nloxtomiia iuti*iirn>< Kaf.) 



lioily more or less elongate, sometimes nearly terete, usually more or 

 le>s compivssed. Head variously long or short, its length ranging from 

 ;;.\ to ~>\ in that of the body. Kye usually rather large, van ing from :; 

 to <; times in tin- Ini-ili of the side of the head, its position high up 

 and median or ralher posterior. Suborbital bones \ er\ narrow, always 

 much lon-er than broad, theii width less than one-fourth that of the 

 Jli->h\ pni ol' the cliiM-k. Fontanelle on tup of head always well open, 

 the parietal bones not coalescing. Mouth varying much in si/.e, always 

 inferior in po>il ion, l he mandible being horizontal or nearly so. Lips 

 usually well developed, ihe tonn of the lower varying in different sec- 

 lions of the ueims, ii-nally \\ilh a sliglit median fissure, luit never 

 deeply incised; the lips with transverse plica-, the folds rarely so 

 broken up as to form papilla-, .laws without conspicuous cartilaginous 



