688 Bulletin 47, United States Natiojial Museum. 



terminal, slightly oblique; lower jaw slightly projecting; jaws each 

 with a series of small, pointed, movable teeth; gill membranes united. 

 Dorsal lin short, on posterior part of body, its origin above, on a verti- 

 cal from middle of anal, and about midway between end of snout 

 and tip of caudal fin; anal in males considerably in advance of dorsal, 

 and trausformed into an iutromittent organ; caudal fin rather long, 

 about 5 in body, slightly dusky at its tip. Color in spirits, brownish 

 olive; a dark band about as wide as eye from mouth through eye and 

 along middle of the side, terminating in a black spot at base of caudal ; 

 baud crossed by 6 to 9 brownish-black vertical streaks which become 

 fainter with age, the anterior ones the less prominent; these nuirkings 

 made up of small dark dots; a black spot on base of dorsal and anal 

 fins. Length, female 1 inch, male I inch. South Carolina to Florida; 

 exceedingly abundant in the black water of swamps and in ditches, in 

 company with Gamhusia affinis; said to be the smallest known fish. 

 (fonuostis, comely.) 



Hetenmilriafoniiufa, AfJASSlz MS, 1853; Gikard, I'roc. Ac. Nat. Sci. Pliila., 1859,62, Charles- 

 ton, South Carolina; Palatka, Florida. 

 Girardimu formositf, Gunther, Cat., vi, 354, 186G; Jordan & Gilbert, Synopeis, 349, 1883; 

 Jordan & Gilbert, Proc. U. S. Nat. Mus., 1884, 236. 



1014. HETERAXDRIA PLEUROSPILIIS (Giinther). 



Head 4; depth 3|. D.8; A. 9; V.G; scales 28-8. Eye more than length 

 of snout, 3 in head, and IJ in interorbital sx^ace, which is slightly 

 concave. In the female the origin of dorsal is at middle of total length, 

 and conspicuously behind that of anal; caudal fin large, longer than 

 head, subtruucate behind ; free portion of tail somewhat elongate, length 

 of base of anal i of its distance from caudal; pectoral fin not quite as 

 long as head and not extending so far backward as the ventral fins, 

 which reach vent; in the male the origin of dorsal is somewhat nearer 

 tip of caudal than that of snout; the anal process quite straight, nearly 

 twice as long as head, and ending in a simple tapering point; caudal 

 very short. Reddish olive ; a series of 6 or 7 round blackish spots, each 

 about the size of the eye, along the middle of the side; a black lino 

 along the base of the anal fin and on lower and uj^per margins of the 

 tail ; caudal fin with 2 indistinct dark cross bands. Females 2 inches 

 long, males 1. Guatemala. (Gunther.) (nXevpov , side ; aTrZAor, spot.) 

 Girardinus pleurospilus, Gunther, Cat., vi, 353, 1866, Lake of Dueftas. (Coll. Siilviu.) 



1015. HETERANDKIA VERSICOLOR (Giinther). 



Head 3f ; depth 3?. D. 8; A. 8; V. 6; scales 27-8. Eye longer than 

 snout, 2i in head, and IJ in interorbital space, which is nearly flat. In 

 the female the origin of dorsal is nearer tip of snout than tip of caudal 

 and opposite second ray of anal ; caudal moderate, as long as head, rounded 

 behind; free portion of tail somewhat elongate; length of base of anal 

 fits distance from caudal; pectoral shorter than head, extending some- 

 what beyond root of ventrals, which reach vent. Reddish olive above, 

 sometimes with indistinct silvery crossbars on the side of the tail; an 



