GILDED DARTER. 975 



not protractile ; vomerine teeth very feeble or wanting; scales large; gill- membranes 

 broadly connected, no enlarged ventral plates ; lateral line complete ; dorsals well sep- 

 arated, the second mnoh larger than anal, higher and shorter than spinoas dorsal ; dor- 

 sal spines altont ten ; anal spines two. 



This genus is mainly distinguished from Nothonotus by the broad union 

 of the gill- membranes. 



.145. Nanostoma zonale (Cope) Jordan. 



Poeoilichthys zonalis, Cope, Joum. Acad. Nat Sol. Phila., 1868, 212, tab. 24, f. 1. (male). 

 NanosUma zonalis, Jordan, Bull; U. S. Nat. Mus., x, 1877, 15, and elsewhere. 

 Nanostoma vinetipes, Jordan, Proc. U. S, Nat. Mns , 1879 (female). 



Description. — Body slender, somewhat compressed ; head small, rather short ; the 

 month small, snbinferior ; snont decurved, rather obtnse, maxillary not reaching front 

 of eye ; cheeks, opercles, necfe, and throat closely scaled ; eye rather large ; teeth very 

 feeble, those on the vomer not evident, probably none on the palatines ; first dorsal 

 well developed, separated from the second, which is higher and shorter than the spinous 

 dorsal, arid considerably larger than the anal ; candal emarginate ; bright olivaceous 

 above, golden below ; six dark brown quadrate dorsal spots, which connect by alter- 

 nating spots with a broad, brown lateral band, from which eight narrower dark-blnish 

 bands more or less completely encircle the belly ; paired, anal, and candal fins golden, 

 brown-spotted; middle half of the first dorsal crimson; a series of round, crimson spots 

 near the base of the second dorsal ; occiput, a band on muzzle and one below eye black ; 

 a black spot on opercnlnm and one at base of pectorals ; females duller and speckled ; 

 the ventrals barred ; the lateral bars feebler ; head 4^ ; depth 5 ; D. XI, 12 ; A. II, 7 ; 

 scales 11-50-12. Length 2^ inches. 



Habitat, Ohio and Upper Mississippi Valleys, widely diffused but not generally 

 abundant. 



HaMts. — Nothing distinctive known. 



146. Nanostoma tessellatum Jordan. 



Sadropterus tessellatus, Jordan, Bull. U. S. Nat. Mus , x, 1877, 7. 



Description. — Color olivaceous, the markings obliterated in the type ; body fusiform; 

 head broad and heavy, entirely naked ; neck soaiy ; mouth moderate, horizontal, the 

 lower jaw included, the maxillary extending to opposite front of eye ; anal higher than 

 second dorsal, but not so long, its spines strong; gill- membranes broadly united ; D. X, 

 12 ; A.. II, 8 ; Lat. 1. 48. Length 2i inches. 



This species is known only from one specimen, in poor condition, 

 taken in the Alleghany River, at Foxburg, Pennsylvania. 



Gbntjs 79. NOTHONOTUS. Agassiz. 



HFothonotus, Agassiz, Bull. Mus. Comp. Zool., i, 1863, 3. 

 Type, Etheostoma maculata, Eirtland. 

 £tymology, nothos, prominent ; notos, back, from the high dorsal fins. 



