( 43 ) 
on the top larger than those on the body. Sides of the scales on the body 
with longitudinal brown spots, forming very distinct, but rather narrow, 
brown, longitudinal lines. Along the center of each scale is a row of very 
fine brown dots, forming minute lines between the heavier ones along the 
borders of the scales. Beneath, in front of the anal fin, orange yellow. 
FAMILY UMBRIDAE. 
Genus Melanura , Linn . 
54. M. limi , ( Kirt .) Ag. Mud Minnow. Exceedingly numerous in 
prairie sloughs and sluggish streams in the northeastern part of the state. 
It is also of very rare occurrence in the streams through the state tributary 
to the Ohio, where it is occasionally taken. 
FAMILY ESOCIDAE. 
Genus Esox , Linn. 
55. E. nobilior, Thomp. Muskellunge. Bather common in Lake 
Michigan, and reported to occur in some of the small lakes in the northern 
part of the state. 
56. E. lucius, var. estor , ( LeS .) Lake Pike. Very abundant 
throughout the northern part of the state. 
57. f? E. boreus , Ag. Several specimens, about seven inches long, are 
in the collection of the writer, from the Fox river at Geneva. 
58. E. salmoneus , Raf. Little Pickerel. Abundant throughout the 
state. 
59. E. cypho , Cope. A single specimen, in good condition, from the 
Fox river at Geneva, agrees in every way with Prof. Cope’s description of 
this species (Proc. A. N. S., Phil., 1865, p. 78), with the exception that 
the bars and dots are obsolete in my specimen. Although Prof. Cope has 
referred this to a previously described species, yet so marked are its char- 
acteristics, that several who have examined my specimen have at once re- 
ferred it to this species. 
60. E. umbrosus , Kirt. Four specimens from the Fox river at Geneva, 
— Prof. Cope’s Var. A. of this species. (Trans. A., Ph. Soc., 1866.) This 
species approaches closely to salmoneus , and may eventually be reduced to 
a variety of that species. 
FAMILY PERCOPSIDAE. 
Genus Per cop sis, Ag. 
61. P. guttatus , Ag. Trout Perch. Numerous in Lake Michigan, 
and of rare occurrence in the larger rivers. 
FAMILY SALMONIDAE. 
Genus Salmo , Linn. 
62. S. salar * L. Great Sea Salmon. Fox river at Aurora and near 
Elgin. 
63. S. quinnat ,* Rich. California Salmon. Fox river at Aurora and 
near Elgin. 
* As this paper is passing through the press, 1 learn from Dr. W. A,. Pratt, of 
Elgin, that he has taken these two species this summer, at the localities given. I 
therefore take the liberty of inserting them in this list. — S. A. Forbes. 
