Described Species of firesh Water Crustacea. 349 



2. C. GLOBOSUS Baird. Ann. and Mag. Nat. Hist, ii, 90^ 

 t. 3, figs. 1-4 (1843); British Entomostraca, 127, t. xvi, fig. 7,' 

 (185Q). Birge. Trans. Wis. Acad. iv, 100 (1811). Herrick. 

 Final Report, 116 (1884). 



Hob. Wisconsin (Birge), Minnesota (llerrick). 



3. C. SPH^ERICUS Baird. Ann. and Mag. Nat. Hist, ii, 89, 

 t. 2, figs. 11-13 (1843); British Entomostraca, 126, t. xvi, fig. 

 8 (1850). Birge. Trans. Wis. Acad. iv, 99 (1877). Cham- 

 bers. Bull. U.S. Geol. Survey (Hayden), iii, 155 (1877). 

 Herrlck. 7th Rep. Geol. Minn. 108 (1879); Final Report, 116 

 (1884). 



Hob. Massachusetts. Lake Michigan, and Wisconsin (Birge), Min- 

 nesota (Iferrick), Kentucky and Colorado (Chambers). 



XII. MONOSPILUS SARS. 



1. M. DISPAE, Sars. Crust. Cladoc. i Omgn. af Christiana, 

 165 (1862). Herrick. Final Report, 119 (1884); Bull. Scien- 

 tific Lab. Denison Univ. i, 38 (1885). 

 Hob. Minnesota (Herrick). 



FAMILY POLYPHEMID^3. 

 I. POLYPHEMUS MOLL. 



1. P. PEDICULUS De Geer. Mem. pour serv. a Thistoire 

 Ins. yii, 467, t. 28, figs. 9-13 (1778). Birge. Trans. Wis. 

 Acad. iv, 109 (1877). Herrick. 10th Rep. Geol. Minn. 251 

 (1882); Final Report, 121 (1884). 



Monoculus pediculus Linnaeus. Syst. Nat. (12th Ed.) i, 

 1058 (1767). 



Polyphemus oculus Miiller. Entomostraca, 119, t, 20, figs. 

 1-5 (1785). 



P. occidentalis Herrick. 7th Rep. Geol. Minn. 122 (1879). 

 Halj. Massachusetts (Birge), Minnesota (Iferrick). 



2. P. STAGNALIS Herrick. Final Report, 122 (1884). 

 . Minnesota ? (Herrick ) . 



