7,^ 



95. Hyhognathus nuchalis, Agassiz.— Silvery Minnow. 



Almost strictly a river species, being most abundantly represented in our 

 collections from the Illinois, and next from the Wabash, Ohio, and the Missis- 

 sippi. We have not taken it in any lake or pond outside the great river bot- 

 toms, and it has occurred but rarely in creeks. 



Genus 51. Chrosomds, Raf. 



^6. Ohrosomus eri/tJirogaster, Agassiz. — Red-bellied Dace. 



This species has occurred sparingly in our collections but from all parts of 

 the State, both in rivers and small streams. We have not taken it, however, 

 from lakes or ponds. 



Genus 52. Oxygeneum, Forbes. 



97. Oxygeneum pulverulentttm, Forbes. 



Only a single specimen of this genus and species is thus far known, and 

 this was taken from the Illinois river, at Peoria. 



Genus 53. Campostoma, Agassiz. 



98. Campostoma anomalmn, Raf. Stone-roller; Stone-lugger. 



This species is very common in small streams throughout the State, from 

 Galena to Cairo, and occurs occasionally in rivers, but rarely or never in 

 lakes or ponds. 



Family XXI. CATOSTOMID.^. (The Suckers.) 



Genus 54. Placopharynx, Cope. 



Big Jawed Suckers. 



99. Placopharynx carinatus, Cope. 



This species has not actually occurred in our personal collections from Illi- 

 nois, but has been received by Dr. Jordan from the Illinois river, and is 

 said by fishermen to be rather common in the Wabash. Its resemblances to 

 Moxostoma are so strong that it would very probably be passed by collectors 

 as belonging to that genus. 



Genus 55. Moxostoma, Raf. 

 Red Horse. 



100. Moxostoma aureoliim, Le. S. 



Distribution like that of the. following species, from which it is, in my 

 opinion, but doubtfully distinct. Less common in Illinois than macrolepido- 

 tum. 



101. Moxostoma macrolepidotum, Le Sueur. — Common Red Horse; Mullet; 



White Sucker; Large-scaled Sucker. 



CBul. II, 03 and 04; Myxostoma niacrolepidotum , Myxostoma velatinn.) 

 Very abundant everywhere in lakes, rivers and smaller streams. It in- 

 habits Lake Michigan and the smaller lakes in northern Illinois, and is not 

 less common to the southward. Where the common sucker is not known its 

 name is appropriated to this species, the name of "red horse" being rarely 

 heard in Southern Illinois. 



102. Moxostoma carpio. Val.— Carp Mullet. 



Said by Dr. Jordan to occur in the Great Lakes. Not positively identified by 

 me in Illinois, the common lake mullet of South Chicago not being clearly 

 different, to my mind, from Moxostoma macrolepidotum. 



