168 BULLETIN 2 01, UNITED' STATES NATIONAL MUSEUM 



1 male, 3 females. Stockholm*, identified by S. I. Smith; Lake 

 Michigan* and Lake Superior*, identified by S. I. Smith. 



Distribution. — This species has been recorded from Green Lake, 

 Wis., by Marsh (1891) and from Green and Trout Lakes, Wis., by 

 Juday and Birge (1927). These are the only records I can trace for 

 the fresh waters of the United States except for those from the Great 

 Lakes. Its occurrence in the water supply of Duluth is interesting. 



Figure 62. — My sis relicta Loven: a, Antennal scale; b, third pleopod of male; c, fourth 

 pleopod of male; d, telson. (After G. O. Sars.) 



MYSIS MIXTA Lilljeborg 



Figure 63 



Mysis mixta Luxjeborg, 1852, p. 6. — S. I. Smith, 1879, p. 102. — R. Rathbun, 

 1880, p. 228; 18S3, p. 212.— Aurivillius, 1896, p. 198.— M. Rathbun, 1905, 

 p. 27 ; 1909, p. 484.— Tatterball, 1939b, p. 284. 



Michtheimysis mixta, Allee, 1923a, p. 180. — Pkoctor, 1933, p. 243. 



Occurrence. — East coast of North America: United States Fish 

 Commission locations 10, off Salem, Mass., 20 fathoms, August 6, 

 1877, 23 specimens; 24, off Salem, 33 fathoms, August 13, 1877, 1 dam- 



