109 



Genus 66. Lepidosteus, Lacepede. 



126. Lepidosteus platystomiis, Raf. — Short-nosed Gar. 



One of the most abundant of the larger Illinois fishes, rarely oc- 

 curring, however, in the smaller streams, and confined chiefly to 

 the larger rivers and the lakes and ponds connected with their 

 waters. It is also taken in Lake Michigan. 



127. Lepidosteus osseus, L. — Long-nosed Gar; Bill-fjsh; Common 



Gar Pike. 



Generally abundant in the larger streams throughout the State, 

 and taken by us in the Illinois, Mississippi, and Ohio. Occurs also 

 in the smaller lakes in Northern Illinois. 



Sub-class CHONDEOSTEI. 



Order X. GLANIOSTOMI. 



(The Sturgeons.) 



Family XXV. ACIPENSERID^. 



Genus 67. Scaphirhynchops, Gill. 



128. Scapliirhynchops platyrhynclms, Raf. — Shovel-nosed Sturgeon; 



White Sturgeon. 



Taken by us somewhat rarely in the Ohio and Mississippi Rivers 

 at Cairo, and in the Illinois at Peoria. 



Genus 68. Acipenser, L. 



129. Acipenser ruhicundus, Le Sueur. — Lake Sturgeon; Ohio Stur- 



geon ; Black Sturgeon ; Stone Sturgeon ; Rock Sturgeon. 



(Bui. II, 69 ; Acipenser macalosus, Acipenser ruhicundus.) 



Ohio, Mississippi, and Illinois Rivers and Lake Michigan. 

 Reaches, in the last, a weight of a hundred and fifty pounds, or 

 more. The characters vary greatly with age and size. 



Order XL SELACHOSTOMI. 



Family XXVI. POLYODONTID^. 



Genus 69. Polyodon, Lacepede. 



130. Polyodon spathula, Wall. — Shovel- fish ; Paddle-fish; Spoon- 



bill Cat ; Duck-bill Cat. 



(Bui. II, 69 ; Polyodon folium.) 



Abundant in the Mississippi and Illinois Rivers, and especially in 

 the ponds and lakes in the bottoms of these streams. Rarely, if 

 ever, ascending smaller streams, and not collected by us in any of 

 the interior lakes. Not known from Lake Michigan. Hausman 



