848 Illinois State Lahomtorij of Natural History. 



3. A. PYGM^A Kurz. Dodekas iieuer Cladoceren, 61, t. 

 iii, fig. 7 {18U).— Her rick. Final Report, 105 (1884). 

 //«?'.— Minnesota? (Herrick) . 



X. Pleuroxus Baird. 



1. P. ACUTiROSTRis Birge. Trans. Wis. Acad, iv, 99 

 {lSTt).^Herricl: Final B-eport, 109 (1884). 



Ilab. — Massachusetts (Birge). 



2. P. AFFmis Herrick. Final Report, 111 (1884). 

 JIah. — Alabama {IlerridS). 



3. P. DENTicuLATUS Birge. Trans. Wis. Acad, iv, 98, 

 (ISll).— Herrick. Final Report, 110 (1884). 



Ilah. — ■Massachusetts, Lake Michigan, and Wisconsin (Birge), Min- 

 nesota and Alabama {Uerrick). 



4. P. HAMATUS Birge. Trans. Wis. Acad, iv, 98 (1877). 

 —Herrick. Final Report, 110(1884). 



Ilab. — Massachusetts (5w-gie), Alabama (Rerrick). 



5. P. PROCURVUS Birge. Trans. Wis. Acad, iv, 92 (1877). 

 —Herrick. 10th Rep. Geol. Minn. 250 (1882); Final Report, 

 113 (1884). 



//rt/^.— Massachusetts and Wisconsin (Birge), Minnesota [Ilerriek). 



6. P. STRAMiNEUS Birge. Trans. Wis. Acad, iv, 94 (1877). 

 —Herrick. Final Report, 108 (1884). 



Hah. — Massachusetts (Birge). 



7. P. UNiDENS Birge. Trans. Wis. Acad, iv, 97 (1877). 

 —Herrick. 10th Rep. Geol. Minn. 250 (1882); Final Report, 

 111 (1884). 



//«A.— Wisconsin (Birge), Minnesota and Alabama (Herrick). 



XL Ohydorus Leach. 



1. C. c.^.LATUS Sch()dler. None Beitriige znr Natiirge- 

 schichte der Cladoceren, 15. t. ii, lig. 44 (1863). — Urrrick. 

 Final Rpi)()rt, 117 (1884). 



J lull. — Minnesota (Herrick). 



