THE CYPRINODONTS, 97 
subquadrate in transsection, caudal and pedicel deep. Young are more 
rounded and have not so much of massiveness in the snout. On large ones 
the head is one third or more of the length to the caudal base. Snout broad, 
blunt, rounded, one half longer than the eye. In a five inch specimen the 
eye is two thirds of the snout, one half of the interorbital space, and one 
fifth of the head. Mouth wide, lower jaw longer, upper protractile. Teeth 
conical, in bands, outer series larger; pharyngeal as in F. heteroclitus, Chin 
steep. Dorsal origin little behind the middle of the total length, little in 
front of that of anal. Pectorals reaching a vertical from base of ventrals. 
Caudal deep, two thirds as long as head, rounded to subtruncate, sometimes 
oblique, by reason of the lower half being longer. Oviduct apparently not 
adherent to anal so long a distance as in F’. heteroclilus. 
Most large individuals from the salt water are brownish with faint spots 
of brown, thickly freckled with small spots of white or silver. The fins vary 
from dark to light, more or less spotted with brown and with light color. 
The ocellate spot of dorsal or of anal becomes indistinct or obsolete. Top 
of head and back dark; cheeks dark, sometimes bronzed. In cases that 
retain the ocellus the dorsal may have several transverse series of light spots. 
Anal uniform or spotted. Caudal marked with irregular transverse series of 
small spots to uniform. A whitish margin to dorsal, caudal and anal is not 
rare. Medium sizes from the sea have more of the silver color on the flank, 
in cases arranged in narrow vertical bands. 
Young individuals from fresh water are rusty brownish, with little of the 
silver, with numerous scattered small spots of brown, in cases forming longi- 
tudinal series, in others vertical bands. Lower surfaces lighter, whitish under 
the head. A black spot on the hinder rays of the dorsal is commonly pres- 
ent; occasionally a similar one is found on the anal. Generally these spots 
are edged by white. The spots along the middle of the side are usually 
larger. The tail is spotted but rarely ; generally the fins are nearly uniform 
light colored. Reaches six inches or more in length. 
Florida to Texas. 
Fundulus heteroclitus. 
Plate 11, Fig. 2, teeth; Plate VIII. Fig. 1, female. 
Cobitis heteroelita Linn., 1766, Syst., 1, 500; Mall, 1774, Nat. Syst., TV, 285 ; Neuer Schauplatz der 
Natur, 1775, I, 284; Bor., 1784, Nat. Abb. Fische, 125; Schoepff, 1788, Schr. Ges. N. Fr, VIL, 171, 
172 (Killfish, and Yellowtellied Cobler); Gmel., 1789, Syst., I, 1352; Walb, 1792, Art. Gen. Pisce, 11; 
Donnd., 1798, Beytr,, ITI, 581; Tuart., 1806, Syst. Nat, I, $37. 
Cobitis macrolepidota Walb., 1792, Art. Gen. Pise., 11; Donnd., 1798, Beytr., ITT, 582. 
Lis 
