92 THE CYPRINODONTS. 



the females have a black spot on the anal similar to that on the dorsal. Some 

 specimens are almost black. A specimen of one and one eighth inches is 

 large. The Carolinas to Florida. 



Heterandria minor sp. n. 



Plate IV. Fig, 8, teeth. 



B. 5 ; D. 7 ; A. 8 ; V. 6 ; P. 11-12 ; LI. 29 ; Ltr. 7 ; Vert. 13 + 17. 



Shape similar to that of H. fonnosa. Depth of body or length of head 

 one fourth of the length from snout to base of caudal. Head depressed, 

 crown flattened. Snout short, blunt, rounded, little more than half as long 

 as eye. Chin steep. Mouth small, narrow ; lower jaws firmly united, longer ; 

 upper short, very protractile. Eye large, three eighths of head, three fourths 

 of interorbital space. Teeth in bands; outer teeth firmly set, larger, slightly 

 compressed near the apex, or spear-shaped ; inner smaller and less hooked. 

 Intestine elongate, convolute. On females the fins are small, dorsal and anal 

 are opposed, the former smaller and originating midway from head to base 

 of caudal, a trifle backward of the origin of the anal ; ventrals small, reach- 

 ing the vent ; pectorals elongate, reaching above the forward half of the 

 ventrals ; caudal as long as the head, median rays longest. On males the 

 bases of anal and ventrals are much advanced, being below the pectorals, 

 and greatly modified ; the anal is about one third of the length of the body 

 to the base of the caudal, its distance from the snout about equals its length, 

 and its anterior rays form a long slender pointed organ ; a couple of the outer 

 rays of each ventral form an elongate spear-pointed process which extends 

 along nearly half the length of the anal, resting at its side as if forming part 

 of the intromittent organ, while the inner rays of the ventral are only about 

 half as long as the outer, and near their ends form a projection which in 

 cases turns downward, as if to grasp the anal and better to hold the fins 

 together. The ventral modification appears greater in this species than in 

 H. formosa, where it amounts to a simple elongation of an anterior ray in 

 a flexible process. Females of three fourths of an inch in total length con- 

 tain fully developed embryos. 



Light olivaceous, probably yellowish in life, belly and lower parts of head 

 silvery. Top of head and base of dorsal darker. Edges of scales darker. A 

 white edged black spot on the basal half of the dorsal fin. The length of 

 the males is about seven tenths of an inch and that of the females about 

 eight. Villa Bella, Brazil. 



