APRIL, 1910. FISHES OF CHICAGO MEEK AND HILDEBRAND. 283 



FIG. 48. GERMAN CARP; LEATHER CARP. 



Cyprinus carpio L. (After Goode.) 



An introduced species which has become established in many 

 streams of the northern half of the United States. 



Fox River, McHenry, Illinois; Lagoon, Jackson Park, Chicago, 

 Illinois; Thorn Creek, Thornton, Illinois; Lake Michigan, Millers, 

 Indiana; Lake Michigan, Pine; Indiana. 



Genus Carassius Nilsson. 



GOLD FISHES. 



Body oblong, more or less compressed, varying greatly; phar- 

 yngeal teeth 4-4 ; the dorsal region elevated ; dorsal fin long, its first 

 rays spine-like; the second or third long and serrated behind; anal 

 short with similar spine; lateral line complete. 



a. Soft anal rays 5 to 6 ; scales in lateral series 28 to 32. 



carassius, 283 

 aa. Soft anal rays 7 to 8; scales in lateral series 25 to 27. 



auratus, 284 



Carassius carassius (Linnaeus). CRUCIAN CARP; GOLD FISH. 



Head 3; depth 2%"; D. in, 18; A. m, 5; scales 28 to 32. 



Body robust, covered with large scales; dorsal and anal fins with 

 strong spines, serrated behind; lateral line complete. 



Color dark brown, becoming golden-yellow to silvery under do- 

 mestication. 



Length about 12 inches. 



