(49) 
Genus Teretulus, Raf. (— Moxostoma , Raf.) 
117. T. duquesnii , ( LeS .) G Y ope. Red-horse. Common throughout 
the state. 
118. T. aureolum , {LeS.) Raf. Grolden Mullet. Abundant in Lake 
Michigan and the Calumet river. 
119. T. anisurus, { Raf ) Nelson. Carp Mullet. Specimens are in 
the state collection from the Illinois river. 
120. T. macrolepidotum , {LeS.) Nelson. Apparently not very com- 
mon. Specimens in the state collection, from the Illinois and Wabash 
rivers. (Jordan.) 
121. T. carpio, {Val.) Nelson. Silvery Mullet. Lake Michigan and 
the larger rivers. Not common. 
122. T. velatum, ( Cope) Nelson. Common in all the larger tribu- 
taries of the Illinois and Mississippi. 
Genus Placopharynx , Cope. 
123. P. carinatus, Cope. Cope’s Sucker. Common in the Wabash 
river (Jordan.) 
Genus Ichthyobus , Raf. 
There can be no doubt of the propriety of uniting the two genera 
Ichthyobus and Carpiodes , since a series of specimens will form so complete 
a junction between the characters assigned to each that it is impossible to 
distinguish the dividing line. They have already been united by Prof. Cope, 
but as Ichthyobus has priority over Carpiodes , it must stand instead of the* 
latter. The following is the relation in which they were first issued : 
Ictiobus, Raf. Ich. Oh., 1820, p. 55, n. subg., type Amblodon 
bubalus, Raf., 1818. Carpiodes , Raf. Ich. Oh., 1820, p. 56, n. subg. 
type Catost. cyprinus, LeS., 1818. 
124. I. velifer, { Raf '.) Nelson. Sail Fish. Not uncommon in the 
Ohio and Mississippi rivers. Specimens in the state collection. 
125. I. dijformis, {Cope.) Nelson. Found in Lake Michigan and the 
large rivers through the state. 
126. I. bison , {Ay.) Nelson. Buffalo Carp. Found in the large 
rivers. 
127. 1. thompsoni , {. Ag .) Nelson. Lake Carp. Common in Lake 
Michigan. 
128. 1. carpio , [Raf.) Nelson. Olive Carp Sucker. A single speci- 
men seen from the Ohio river at Cairo. 
129. I. bubalus , {Raf.) Ag. Brown Buffalo. Common in ail the 
large rivers through the state. 
130. 1. cyanellus, sp. nov. Blue Buffalo. A number of specimens of 
this species are in the state collection, from the Illinois river, and in Prof. 
Jordan’s collection, from the Mississippi at St. Louis. The following is the 
description, taken from several specimens, measuring from 8 to 9i inches in 
length : 
Head about 3£ in length. Depth 2£ to 2 5-6. Eye 4$ to 51 in head. 
Dorsal I, 30 and I, 8. Ventrals 10. Lat. 1. 38. Longitudinal rows 
7-5 to 7-6. Body compressed, high. Anteriorly broad, compressed be- 
