71 
Sub-class PHYSOSTOMI. 
Order III. APODES. 
THe EELs. 
Family X. Aneumuipm. (THe True EKEzs.) 
Genus 25. Aneumua, Thunberg. ° 
48. Anguilla rostrata, Le Sueur.—Common Het. 
Not very abundant, but occurring everywhere in streams of large 
and moderate size, throughout Illinois. 
Order [V. HAPLOMI. 
Family XI. ESOCIDA. (THe Prxes.) 
Genus 26. Esox, L. 
49. Hsox nobilior, Thompson.—MUvsKALLUNGE. 
Found by us only in Lake Michigan. 
50. Hsox luctus, L.——Pixs. 
Throughout the State, but most abundant northward. Occurs also 
in Lake Michigan. | 
Dl. Hsox vermiculatus, Le Sueur.—L:ttLe PickEREL. 
(Bul. II, 58; Hsox salmoneus, EHsox cypho.) 
An abundant species north and south, occurring most commonly, 
perhaps, in weedy lakes, but scarcely less frequent along weedy 
‘Margins of rivers and smaller streams. 
Family XIJ. UMBRIDAi. (THe Mup Mrinnows.) 
Genus 27. Umsra, Muller. 
52. Umbra lim, Kirt.—Mup Minnow. 
(Bul. II, 52; Melanura limi.) 
Lakes and muddy ponds in northern and southern Illinois; not 
taken by us in the central part of the State. Occurs occasionally 
in running streams, as in Fox River, at McHenry. 
Family XIII. CYPRINODONTIDA. (THe Tootnep Minnows.) 
Genus 28. Gampusia, Poey. 
58. Gambusia patruelis, B. & G. 
(Bul. II, 52; Zygonectes melanops: Synop., 340 and 892; Zygonectes 
melanops, Zygonectes murus.) 
A southern species, not collected by us north of White county. 
‘Abundant in ponds and streams in the hill region of Southern [lli- 
‘ois. 
