49 CYPEINODONTJD^ ZYGONECTES. 
341 
553. Z. dispar * Agassiz. 
Body short and deep, much eompressed. Head short and very broad, 
the flat interorbital space being two-thirds of its length, and barely twice 
the diameter of the eye ; the distance between the eyes above greater 
than the distance between them below. Snout broadly rounded. Fins 
moderate 5 dorsal much smaller than anal. Outer series of teeth some- 
what enlarged. Coloration pale olive, bluish in life; a very distinct 
brownish line along the edges of each row of scales, ai)i)eariug wavy or 
serrated as it follows the scales; about 10 of these longitudinal stripes 
are present; males with the lines interrupted, appearing as series of 
dots and further marked by about 9 dark cross-bars; adults with a dark 
blotch below the eye, sometimes confluent with it. Oviduct free from 
anal. Head 3| ; depth 31. D. 7 ; A. 9; scales 35-10. L. 2^ inches. 
Lakes and sluggish streams from Ohio to Iowa. 
(Agassiz, Araer. Jour. Sci. Arts, 1854, 353; Jordan, Proc. Acad. Nat. Sci. Phila. 
1877, G7.) 
554. Z. brachypteras Cope. 
“ Base of the first dorsal ray behind the vertical line equally dividing 
the base of the anal ; ventrals not reaching base of anal. Scales large. 
Head wide, with overhanging supercilia ; interorbital width twice the 
diameter of the orbit, which enters the length of the head 21 times. 
Color uniform olivaceous, the scales with brown edges; cheeks silvery; 
no spots on the head. Body stout. Head 4J. D. 7 ; A. 8. Scales 
30-9. Length 2.” (Cope, MSS.) Trinity Eiver and other streams in 
Texas. 
* Professor Agassiz, Amer. Journ. Sci. Arts, 1854, 353, mentions three more speeies of 
this genus, which have not since been recognized, besides two (Z. lateralis and Z. zona- 
tns) which are evidently identical with Z. notaius, and another, Z. lineolatus, which 
Professor Putnam informs us is identical with Z. nottii. 
Z. nottii Agass. 
‘‘The darker continuous longitudinal lines alternate with fainter interrupted ones. 
Males with distinct transverse bands ; dark olive above, fading upon the sides ; sil- 
very below. Operculum, throat, and space in advance of the eye orange color.” Mo- 
bile, Ala. 
Z. guttatus Agass, 
“A large dark spot Tipon the centre of each scale on the back and sides, forming 
longitudinal rows of disconnected dots. The transverse bars of the male are much 
narrower and nearer together than in Z. lineolatus (nottii).- Dark olive above, fading 
upon the side. Abdomen silvery.” Mobile, Ala. 
Z. hieroglyphicus Agass. 
“Anterior and upper iiarts of the body sprinkled with dark dots, passing into longi- 
tudinal rows backwards. Light olive above ; silvery on the sides and below.” Mo- 
bile, Ala. 
