72 TWELFTH REPORT. 



Michigan (Forbes, "97), Antrim Co. (Marsh, '97). Taken at Ann Arbor, 

 Dec. 21, 1908. 



49. Ci/clops h'licl-arfi Sars 



Lake Erie; Lake Michigan; Lake St. Ckiir; Antrim, Cheboygan, Charle- 

 voix, Ionia connties (Marsh, '97). 



50. Cyclops pltalcratus Koch 



Lake St. Clair; Antrim and Cheboygan counties (Marsh, '97). 



51. Cyclops prashtus Fischer 



Antrim, Charlevoix, Cheboygan, Emmet, Ionia counties; Lake Erie, 

 Lake St. Clair, Lake Michigan (Marsh, '97). 



52. Cyclops serndaius Fischer 



Marquette (Forbes, '91) ; Antrim, Cheboj'gan, Charlevoix, Emmet 

 counties; Lake St. Clair, Detroit River (Marsh, '97). Taken at Ann 

 Arbor, Dec. 21, 1908, Nov. 20, 1909. 



53. Cyclops vcmalis Fischer 

 Taken at Ann Arbor. Dec. 21, 1908. 



54. Cyclops riiidis hrciisponosus Herrick 



Antrim, Charlevoix, Emmet, connties ; Lake Erie, Lake St. Clair, De- 

 troit River (Marsh, '97). Taken at Ann Arbor, Nov. 20, 1909. 



55. DiapHonuis aslihrndi Marsh 



Lake Michigan, Lake St. Clair, Detroit River, Charlevoix Co. ( Marsh, 



'97); Michigan (Schacht, '97). 



50. Diaplomus minutus Lilljeborg 

 Lake Michigan. Lake St. Clair, Detroit River; Charlevoix, Cheboygan, 



Emmet connties (Marsh, '97); Michigan (Schacht, '97). 



57. Diaptonius oregoncnsis Lilljeborg 



Lake Erie, Lake Michigan, Lake St. Clair; ' Antrim, Charlevoix, Che- 

 boygan, Emmet, Genesee, Ionia counties (Marsh, '97), ^Michigan 

 (Schacht, '97). 



58. JJiaptoiiuis rcighardi Marsh 



Antrim, Charlevoix, Emmet counties (Marsh, '97). 



59. Diaptonius sicilis Forbes 



Grand Traverse Bay (Forbes, '82), Marquette (Forbes, '91), Lake :Mi('hi- 

 gan. Lake St. Clair, Detroit River, Charlevoix county (Marsh, '97), 

 Michigan (Schacht, '97). 



60. Epischura lacustris Forbes 



Grand Traverse Bay (Forbes, '82) ; Lake Michigamme (Forbes, '91) ; 

 Lake Michigan (Forbes, '97) ; Lake Michigan, Lake Erie, Lake vSt. 

 Clair; Antrim, Charlevoix, Cheboygan, Emmet, Genesee, Ionia coun- 

 ties (Marsh, '97). 

 01. Lcrnaeocera cruciata Le Seiu'^ 



Michigan (Underwood, '80). 

 .62. Lernaeocera pcdloralis Kellicot^ 



Michigan (Underwood, '86). 



63. Limnocalanus macrurus Sars 

 Marquette (Forbes, '91), Michigan (Forbes, '97). 



Sub-order Branchuira 



64. Argulus americanus Wilson 

 Ann Arbor (Wilson, :04). 



iParasitic on fish. 



