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.83.V.6;. PB. TIH1255 il 29) hires) Vertis old 
Shape similar to that of H. formosa. 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. 
