PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 143 



twelve blackish spots at regular intervals on dorsal fin, six or seven 

 similar ones on anal. The ventral on the eyed side is marked like 

 the anal. The colors and spots extend over on the blind side on the 

 nasal bones, j)remaxillary, chin, and interopercle. The skinny flap in 

 the month between the teeth and vomer is also spotted. 



One specimen (2G838), 16 inches in length. 



This species, well described and figured by Broussonet in 1782, seems 

 not to have been seen by any succeeding author. The specific name 

 ^hnancus^^ has been wrongly transferred by Dr. Giinther to the very 

 different Platophrys hetcropJithalmus of the Mediterranean. 



Indiana University, April 4, 1882. 



DESCRIPTIOIV OF A IVE^V CYPRINODOIVT (ZYGOIVECTES IXUKUS), 

 FROM SOUTIIEKIV ILIilNOIS. 



By DAVID S. JORDAN ami CHARLES H. GILBERT. 



Zygonectes inunis sp. nov. (29666.) 



Zygonectes melanops Jordan, Bull. Ills. Lab. Nat. Hist. No. 2, 52 : uot Haplo- 



chilas melanops Co])e,= Gamhmia holhroohi (Agassiz). 

 Zygonectes melanops- J ord, & Gilb. Syu. Fish. N. A. 340. 



Closely allied to Zygonectes dispar Agassiz. 



Body rather short and high, compressed, the back considerably 

 arched; caudal peduncle deep and compressed; head small, much nar- 

 rowed forwards; interorbital space twice as wide as diameter of orbit; 

 eye rather large, 3i times in head — as long as snout, which equals man- 

 dible; teeth small, in villiform bands, the outer series not at all en- 

 larged; height of caudal peduncle at vertical behind anal fin 1^ in head ; 

 at base of caudal li in head. 



Dorsal small, posteriorly inserted ; distance from its origin to snout 

 twice that to base of caudal; length of base of tin 2f in head; the 

 vertical from origin of dorsal passes through middle of anal base. 

 Distance from origin of anal to base of caudal 1^ times in that to tip 

 of snout ; length of anal base equalling one-half that of head ; its longest 

 ray two-thirds head ; pectoral broad, reaching beyond base of ventrals, 

 1;^ in head. 



Scales in regular series, the humeral scale not enlarged; 29 oblique 

 series fof scales from scapula to base of caudal fin ; 9 in an oblique series 

 from vent to middle of back. 



Head 3f in length ; depth 3f. D. 0; A. 9; scales 29.9. 



Color: Brownish, light on belly and sides of head; sides and back 

 with a few scattered dark brown specks, these forming inconspicuous 

 series behind pectorals ; caudal peduncle punctate with brown specks 

 below ; opercles silvery ; a very decided, well-defined, brownish-black 



