(49) 



Genus Terettdus, Raf. (p^Moxostoma, Raf.') 



117. T. diiquesnii, (LeS.) Coj>e. Red-horse. Common throughout 

 the state. 



118. T. aureolum, (^LeS.) Raf. Golden Mullet. Abundant in Lake 

 Michigan and the Calumet river. 



119. T. anigura!<, (^R(i/.) N^chon. Carp Mullet. Specimens are in 

 the state collection from the Illinois river. 



120. T. macrulepidutum, {LelS.) Sdson. 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. vrlatinn, [Copr] Nelson. Common in all the larger tribu- 

 taries of the Illinois and Mississippi. 



Genus Placopharynx, Cope. 



123. P. raruiatus, Cope. Cope's Sucker. Common in the Wabash 

 river (Jordan.) 



Genus Ichthyohus^ Raf. 



There can be no doubt of the propriety of uniting the tveo genera 

 Ichthy^bus 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 Jcht/iyohas has priority over Carpiodes, it must stand instead of the 

 latter. The following is the relation in which they were first issued : 



Ictiobas, Raf. Ich. Oh., 182(», p. 55, n. subg., type Amblodon 

 huhahis, Raf., 1818. Carpiode^^, Raf. Ich. Oh., 1820, p. 56, n. subg., 

 type Catost. cyprums, LeS., 1818. 



124. /. celi/cr, i^R<i/.) NeWm. Sail Fish. Not uncommon in the 

 Ohio and Mississippi rivers. Specimens in the state collection. 



125. I. dijf'onnis, yCope.) Nelson. Found in Lake Michigan and the 

 large rivers through the state. 



126. 1. bison, {A(/.) Nelson. Buffalo Carp. Found in the large 

 rivers. 



127. I. 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. /, bubalus, [Raf.) Ag. Brown Buff"alo. Common in all the 

 large rivers through the state. 



130. 1. cyanellus, s-p. noY. Blue Buff'alo. 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 5^ 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- 



