I909-] THE CAYUGA LAKE BASIN, N. Y. 399 



40. Salvelinus fontinalis (Mitchill). Brook trout. 



Common in suitable streams throughout the lake basin. Dur- 

 ing the summer of 1908 many of the younger individuals perished 

 because of the long draught which dried many of the smaller streams. 



IX. Order HAPLOMI. 

 II. Family Umbrid^. The Mud Minnows. 



41. Umbra limi (Kirtland). Mud minnow. 



This species has never been taken at the south end of the lake. 

 Meek took it in small numbers at Montezuma and Cayuga. 



12. Family Esocid^. The Pikes. 



42. Esox reticulatus (Le Sueur). Eastern pickerel. 



Common throughout the basin. Many individuals from this 

 region approach very closely the characteristics of Esox vermicula- 

 fus. 



43. Esox lucius Linnaeus. Northern pike. 



Common throughout the basin. • 



13. Family Pceciliid.e. The Killifishes. 



44. Fundulus diaphanus (Le Sueur). Gray-back. 



Abundant in the lake, marshes, flood lands and the lower courses 

 of the streams. 



X. Order HEMIBRANCHIL 



14. Family Gasterosteid^. The Sticklebacks. 



45. Eucalia inconstans (Kirtland). Brook stickleback. 

 Common in standing water and pools both on the flats and up- 

 lands above falls. 



XL Order ACANTHOPTERL 



15. Family Percopsid^. The Trout Perches. 



46. Percopsis guttatus Agassiz. Trout Perch. 



Common. Found in the south end of the lake and the lower 

 courses of the streams. At the breeding season, which occurs dur- 

 ing the first two weeks in May, they are abundant in the shallow 

 sloughs of the marshes. 



