and its Tributaries. 479 
of Natural Sciences," Vol. L, is essentially correct, 
except in the form of the head and nose, which he 
has but badly represented. 
Amia. Lin. 
C. calva. L. The Dog-Fish of Lake Erie. 
Amia calva. 'Turton's Linneus. Vol.I. p.838. 
*  *  Shaw's General Zoology. Vol. V. p.9. 
*  *  Cuy. Griffith’s Translation, Vol. X. p.447. 
Amia ocellicauda. Richardson. Fauna Boreali-Americana. p. 236. 
Plate XXIX. Fig. 1. 
Head cylindric-conical, rather abrupt anteriorly, 
solid, rugose ; sutures prominent ; upper jaw slightly 
projecting. Vostrils small, circular, a cirrus before 
each. Jaws margined with strong, prominent, flat- 
tish teeth, armed within with numerous erect smaller 
teeth, which also cover the palate. Hyes small, 
circular. 
Body cylindrical anteriorly, compressed towards 
the caudal fin. Scales subcircular, flat, depressed 
somewhat in their centres. Medial line slightly 
‘curved. — i 
. Color. Back of head bluish black ; sides obscure- 
ly maculated in some specimens with olive spots ; 
‘under surface white. 
. The base of the caudal fin oblique ; a black spot 
at its upper edge. 
Length from 18 inches to 2 feet. 
7D. 48; P. 17; V. 6; A. 9; C. 22. 
Hab. Lake Erie. 
