(48 ) 
laying a well defined plumbeous band, along the lower border of which is the 
lateral line. Body considerably compressed ; color usually dark ; a dark 
dorsal stripe ; five or six rows of scales above lateral line ; traces of a black- 
ish spot at base of caudal ; eye moderate. M. megalops, ( Grd.) Jord. is 
the nearest relative, from which amabilis differs by its smaller eye and more 
pointed head, besides minor characters. Megalops is abundant in the rivers 
of Georgia, Prof. Jordan informs me. 
108. M. rubellus, (Ag.) Jord. Rosy Minnow. Exceedingly abund- 
ant in Lake Michigan and all the larger streams through the state. 
109. M. dinemus , Raf. Emerald Minnow. Very common in the Fox 
river at Geneva, and occurs in most of the larger streams through the state. 
Genus Notemigonus, Raf. 
110. N. americanus, (L.) Jord. Shiner. Abundant everywhere. 
Genus Carassius, Nil. 
111. C. auratus, (A.) Bleeker. Gold Fish. This species has become 
naturalized in several of our rivers. 
FAMILY CATOSTOMIDAE. 
Genus Cat,osto7nus, LeS. 
112. C /. teres, ( Mit .) LeS. Common Sucker. Common everywhere 
throughout the state. A form with a shorter head, and presenting other 
slight peculiarities occurs in Lake Michigan. This will probably form a 
variety, but a lack of a sufficient series of specimens has prevented any 
satisfactory conclusion being reached. 
113. C. hudsonius, LeS. Northern Sucker. A single specimen of 
this species is in the state collection from Rock river, at Oregon. In this 
specimen the head is 4 in length ; the lat. 1. 100 : D. 11 ; A. 7 : thus 
answering closely to Agassiz’s C. aurora .* 
Genus Hypentelium, Raf. 
114. H. nigricans, ( LeS .) Jord. Hammer-head. Abundant every- 
where throughout the state. 
Genus Erimyzon, Jord. 
115. E. oblongus, (Mit.) Jord. Chub Sucker. Common in Lake Mich- 
igan and most of the rivers throughout the state. The young of this 
species have the fins tinged with red, and possess a jet-black lateral band. 
116. E. melanops, {Raf.) Jord. Striped Sucker. Common throughout 
the state. One of the main characters upon which this genus is based 
proves to be very uncertain, /. e., the absence of the lateral line. In the 
state collection are specimens of this species which are entirely without a 
trace of the lateral line ; others possess it upon one side only, and others 
have it upon both sides — generally more or less interrupted, however. 
Other characters are present which will sustain the separation of this group 
from related genera, unless new points of connection should be observed. 
Lake Superior, p. 360, pi. 11. 
