556 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1886. 



dal. Tbe anal has its first ray situated midway between tlie posterior 

 border of tbe orbit and tbe base of the caudal. Pectorals and ventrals 

 small. The former have a length about equal to one and a half times 

 tbe diameter of the eye. The tips of the ventrals reach the first anal 

 ray. The caudal fin is ovate and equal to the length of tbe bead. The 

 caudal peduncle is broad and compressed. As in other members of the 

 family there is no lateral line. 



Tbe ground color is pale straw. The upper surface, for a distance of 

 about three scales length on each side of the middle line, is dusky, 

 rendered so by numerous microscopic punctulations. There is also a 

 narrow dark vertebral line anterior to tbe dorsal fin. On the side, just 

 in front of the origin of tbe anal fin and nearer the ventral than the 

 dorsal line, there is a jet black spot about as large as the pupil ; and 

 just in front of the base of the caudal there is a similar, but somewhat 

 larger, spot. Beginning at the anterior spot there is a dark band, 

 formed of minute punctulations, that runs backward nearly to the cau- 

 dal spot. Just before reaching the spot the band widens and at length 

 divides, sending one branch upward and another downward. The lat- 

 ter passes below the spot, unites with a dark streak along the lower 

 edge of the caudal peduncle, and is thus carried upward at the base of 

 the caudal until it unites with the dusky band on the dorsal surface of 

 the caudal iieduncle. The caudal spot is therefore surrounded by a 

 ring of the ground color, which ringat its upper edge joins with a band 

 of the same color lying between the dark lateral and the dusky dorsal 

 bands. A dark streak starts at the bases of the ventrals and passes 

 backward on each side of the anal, where it is most conspicuous, to tbe 

 base of the caudal. Top of the head dark. A narrow dark streak runs 

 forward from tbe eye and spreads over the whole lower jaw. There is 

 no dark streak below tbe eye. Beginning at the binder border of the 

 orbit there is an indistinct dusky band, produced by scattered punctu- 

 lations, that runs backward nearly to tbe lateral black spot. Just be- 

 fore reaching the spot it widens and divides into two short branches, 

 an upper and a lower. Thus the latter spot is less completely ocellated 

 than is the caudal. 



Male unknown. That the species does not belong to the genus Oi- 

 rardinus is indicated by the fact that tbe intestine is not longer than 

 the bod}-. It is jjossible that it is a Gamhusia; but I do not think this 

 probable. 



6. Zygonectes auroguttatus,* n. up. 



Depth in length 4J ; head 3^ ; Fins: D. SorO; A. 10; scales 32-12. 

 Body rather elongate and compressed. Depth contained in the length 

 to the caudal irom 4^ to 4^ times. Caudal peduncle short and deep ; 

 its length in that of the body 4 to 4^ times ; its depth nearly two-thirds 



*Thi8 siiecies is almost certainly ideutical ■with Z. ruirifrons, Jor., which, more- 

 over, is apparently the same as Z. Jtenshalli, Jor. — T. H. Bean. 



