MICHIGAN ACADEMY OF SCIENCE. 73 



Sub-class Malacostraca 

 Order Arthrostraca 

 Sub-order Amphipoda 



Go. DUxCtogammarus fasciatus (Say) 

 Michigan (Uuderwood, '8G), Lake Superior, Ann Arbor (Weckel, :07). 



Taken in St. Josepli county, April 13, 1009. 



06. Eticraf/oiii/x gracilis (Smith) 

 Ann Arbor, Isle Eoyal, Lake Huron, Lake Superior (Weckel, :0T), 



Walnut Lake (Hankinson, :08). 



GT. Gaminanis liinnacus Smith 

 Ann Arbor, Isle Roval, Marquette (Weckel, :07), Michigan (Uuderwood, 



•8G). 



68. Hi/aUcla faxoni (Stebbing). 



Specimens in the L^niversity Museum were taken at Isle Royal. 



69. Hyalella Jc)rickerl)ockcri (Bate) 



Charlevoix Co. (Ward, '97), Ann Arbor, Isle Koyal (Weckel, :07), Oak- 

 land Co. (Hankinsou, :08). 



70. Poittopereia lioyi Smith 



Lake Michigan (Underwood, "86; Ward. '97; Weckel, :07). 



Sub-order Isopoda 



71. Ascllus conniiiiiiis Say 

 Michigan (Richardson, :05). 



72. CyUsticHS conveccus (DeGeer) 



Sag:inaw (Richardson, :05). There are specimens in the T'niversity 

 Museum from Isle Royale and Ann Arbor. 



73. LigidiiDii longicaudatum Stoller 



Taken near "the overflow," at Ann Arbor, Xov. 20, 1909. 



74. AlancaseUus tenax (Smith) 



Lake Huron, Lake Superior, Michigan (Richardson, :05). 



75. MancascUus tciuix dilaHa Smith 

 Detroit River (Richardson, :05). 



76. PorceJIio rathJcei Brandt 



Sagijiaw (Richardson, :05). Taken at Ann Arbor frequently. 



Order Mysidacea 



77. Mysig relicta Loven 



Lake Michigan (Smith, '74; Underwood, '86; Ward, '97), Grand Trav- 

 erse Bay (Forbes, '82). 



Order Decapod a 



78. CainljaiKS argillicolu Faxon 



Detroit, East Saginaw (Faxon, '85). Gratiot, Saginaw, St. Joseph, 

 Washtenaw counties (Pearse, :10). 



79. Camharus hartoui rol)UStus (Girard) 



Lake Michigan (Faxon, '85), Michigan (Adams. :07), Oakland Co. 

 (Hankinsou, :08). Alcona, Crawford, Oscoda, Wayne, Washtenaw 

 counties (Pearse, :10). 

 10 



