BARKED KILLIFISH. 903 



104. FuNDDLus DIAPHANU8 (LeS.) Agassiz. 



Barred Killifish; Toothed JHinnow. 



Eydrargyra diaphana, LeSdeuk, Jonrn. Aoad. Nat. Soi. Phila., i, 1817, 130. 



Fundulua diaphanus, Agassiz.— Jordan, Man. Vert., 1876, — ; Man. Vert. 2d Ed., 1878, 



262. 

 Hydrargyra mulHJasciata, LeSueur, Journ. Aoad. Nat. 8ci. Phila., i, 1877, 131. 

 Fundulua mulUfaaciatus, Cuv. et Val., Hist. Nat. des Poiss., xviii, 200. — Copb, Proo. Acad. 



Nat Sci. Phila., 1865, 78. — Storbr, Hist. Fishes Mass., 1867, — . — Gunther, Cat. 



Fishes Brit. Mas., vi, 1866, 324. — Cope and Yarrow, Wheeler's^Eept , Surveys, etc , 



Fishes, 1877, — , and of most recent writers. 



Description. — Body elongated, somewhat compreEsed, the head flattened above and 

 moderately broad ; depth 4i to 5 in length ; head I?f ; eye large, 3-3f in head, a little 

 less than the width of the interorbital space ; month moderate, of the usual form 

 among Cyprinodonts ; yent about midway between middle of caudal and front of eye ; 

 flcales rather large, in 38 to 40 transverse rows; D. 12 or 13; A. 11 or 12; V. 6; branch- 

 iostegals 5 ; color olive-brown, more or less translucent ; sides silvery with 12 to 16 

 dark olive-brown cross bands, somewhat undulating or irregular, rather narrower than 

 the interspaces; dorsal region irregularly spotted with darker ; fins unspotted. Length, 

 3 inches. 



Habitat, this species occurs abundantly in the brackish waters along onr eastern 

 coast. It also ascends all streams to their sources, being especially fond of the cold 

 .spring water in which they take their rise. It has been taken in various streams of 

 Michigan, Wisconsin, Ohio, and even in Colorado, and in all waters in the State of New 

 York. LeSueut's original types were from Saratoga Lake. 



Diagnosis. — This species may be known at once among our small fishes 

 by the posterior dorsal, all of soft rays, in connection with the dark bars 

 on the side. 



Habits. — In Ohio, this species will be found chiefly in the small lakes 

 and ponds in the northern part of the State. Its size is too small for it 

 to attract special attention. Like all the members of its family, it is ex- 

 tremely tenacious of life. 



Genus 56. ZYGONECTES. Agassiz. 

 .Zygonectea, Agassiz, American Jonrn. Sci. Arts, 1854, 135. 

 Micriatiua, Gill, Canadian Naturalist, August, 1865, p. 24. (Type, Fandulua zonatua 



Cuv. and Val) 

 Fundulua, Haplochilua, and Pwdlia, sp. of authors. 

 Type, Pcecilia olivacea Storer, = Semolilus notaiua, Eaf. 



Etymology, zugoa, a yoke (in pairs) ; nectes, swimmer, from the supposed habit of 

 swimming at the surface of the water in pairs. 



This genus is closely related to Fandulua, difl'ering chiefly in the small size and 

 posterior position of the dorsal, which has usually less than ten rays and is commonly 

 inserted behind the front of the anal fin ; the species are smaller in size than those of 



