110 IOWA ACADEMY OF SCIENCES. 



ORDER VIII, ISOPONDYLI. 

 FAMILY 9, HIODONTID.E (tHE MOON EYES). 



49. i Hiodon tergisus (Le Sueur). Moon-eye. Silver bass. Cedar Rapids. 

 Scarce. 



FAMILY 10, CLUPEID^ (tHE HERRINGS). 



50. t Clupea chrijsochloris (Rafinesque). Skip-jack. Cedar Rapids. Scarce. 



51. \ Dorosoma cepedianum (Le Sueur). Gizzard shad. Hickory shad. Not 

 common. 



FAMILY 11, SALMONIDjE (THE SALMOn). 



52. *Salvelinus fontinaUs (Mitchell). A few specimens are occasionally taken 

 from McLeod's run, near Cedar Rapids. This species was originally placed here by 

 Mr. Shaw, formerly State Fish Commissioner of Iowa. Mr. Minott, a trapper and 

 fisherman, Mt. Vernon, Iowa, informs me that he has seen this species in small 

 tributaries of the Cedar river near Mt. Vernon. 



FAMILY 12, CYPRINODONTIDvE (tHE KILLIFISHES). 



53. f Ftindithis zebrinus (Jordan and Gilbert). Not common in the Cedar 

 basin. More abundant in the lakes. 



54. f Zygonectes notatus (KsL^nesqne). Top minnow. Usually found in small 

 numbers. 



55. Zi/gonectes dispar (Agassiz). West Liberty. Taken from a large bayou. 



FAMILY 13, UMBHID.E ( THE MUD MINNOWS). 



56. Umbra llmi (Kirtland). Mud minnow. Rather scarce; taken only in 

 small grassy ponds. 



FAMILY 14, LUCIID^ (THEPIKES). 



57. — Lucius rermkidaius [ha ^ViQnx). Little pickerel. Common in the grassy 

 bayous. 



58. * Lucius lucius (Linnseus). Pike. Northern pickerel. Common. It 

 loiters in grassy and weedy places. This species is known as pickerel in Iowa. It 

 is the true pike. The name pike is erroneously given to the wall-eyed pike. 



ORDER IX, APODES (THE EELS). 

 FAMILY 15, ANGUILLID^E 



59. *Angu)lla crysypha (Rafinesque). The common eel. Cedar Rapids and 

 Waterloo. Not common. 



ORDER X, HEMIBRANCHII. 

 FAMILY 16, GASTEROSTEID^. 



60. EucaUa inconstans (Kirtland). Brook stickleback. Scarce. Found only 

 n small brooks. 



+ modo?ia?osoides (Rafinesque). Missouri river. Scarce. 



FAMILY PERCOPSIDiE (THE TBOCT PERCHES). 



iPercopsis giittatus (Agassiz). Trout perch. This species is very abundant in the 

 tributaries of the Missouri river. , ,. , 



^Fandulm diaphanus (Le Sueur). Not recorded from Iowa. Evidently belongs to 

 her fauna. 



*Zygon6ctcssciadlcus {Cope). Le Mars. Scarce. 



*Luciu8 masquinonmj (Mitchell). Maskallunge. Scarce. Known from Mississippi 

 river, also the Skunk river near Ames. The largest and most voracious fish m Iowa 

 waters. 



