and its Tributaries. 339 
Dorsal fin quadrangular, elevated before, emarginate on 
its superior edge. 
Caudal fin acutely bilobed ; lobes equal. 
Anal fin of the male, rounded on the anterior angle, deeply 
emarginate in the middle; of the female, acute on the an- 
terior angle, with the edge falcated. 
Ventral fins with a squamous appendage above their bases. 
Pectoral fins arise beneath the operculum, falcate, and do 
. not reach to the ventrals. 
Color. The fins diaphanous and white; the body and 
back bluish, silvery and iridescent; head and operculum 
silvery and iridescent. i 
D. 14; C. 20; A. 31 or 32; V. T; P. 13 rays. 
Observations. This fish abounds both in Lake Erie and 
the Ohio River. Itis not very highly valued for eating. 
An inspection of the plate will convince any one that Le- 
Sueur made two species from a mere sexual variety. Fig. 1 
is his H. tergissus, and fig. 2, H. clodalus ; the former is the 
male, the latter the female ; but it is due to him to say that 
he suggested that such might be the fact. 
Rafinesque describes several other species, which I have not 
had an opportunity to obtain. 
Esox. Lesueur. 
E. estor. Lesueur. Muskallongé. 
Pus estor.. Pike, Pickerel, Maskallongé. Lesueur, Jour. Ac. Nat. Sc. i. p. 413. 
[11 
Griffith’ 390. " 
* ie Maskinongé. : Rich. Faun. Boreal. Amer. iii. p. iat. 
Fei o Muskallongé. Kirtland’s Report, pp. 169, 194. — 
y Muskellunge. Dekay's Report, p. 222. 
Plate XXVIII. Fig. 3. 
Head gradually sloping from the base to the tip of the 
upper jaw, longitudinally depressed between the eyes, and 
transversely before them. Nasal openings twain, anterior 
