Botany and Zoology. 135 
shall call prone ere itp similar in general appearance to = blind 
fish of the Mammoth Cave, though provided with eyes; it has like Am- 
blyopsis the mith aperture ae advanced under the throat, but is eos 
deprived of ee a very strange and unexpected combination 
of characte I know but one species, Ch. cornutus, Ag. It is a 
small fish icnodn thie inches long, living in the ditches of the rice 
fields in South Carolina. I derive its specific’ name from the singular 
form of the snout, which has two hornlike projections a 
The family of Cyprinodonts has received the most numerous addi- 
tions, and among them there are again new combinations of characters. 
sexual differences, and differs also in its habits ese fishes are con- 
—— seen swimming on the top of the water in pairs, whence their 
nha I have found half a dozen new species of this g 
the Acad. of Nat. Sci., vol. 2, to appreciate the facts here mentioned. 
From its structure and from the sexual differences observed among 
other Cyprinodonts, I have long entertained the opinion that this genus 
had been established upon the males of Peecilia mutilineata also de- 
scribed by Lesueur (same Journal), and both admitted as distinct in the 
great natural history of fishes by Cuvier and Valenciennes. aving 
found both together in all the Gulf States, I have watched them care- 
fully, and i in Mobile as well as in New Orleans, I have seen them day 
are viviparous. I have been able to trace their whole embryonic de- 
velopment in the 7 of the mother, in selecting specimens in differ- 
ent yi of gest 
I do cs oeteaue oilaatin I have already mentioned to you the ex- 
istencil in rhe United States of two families of fishes not before observed 
in our waters, one the aon, s with one species from Eastport in 
| ma 
tail. But I would tire you were I to on with my ee eee. 
remarks, even if I should i pelll to enumerating new gen 
for I have many more o 
