348 Illinois State Laboratory of Natural Histonj. 



3. A. PYGM^EA Kurz. Dodekas neuer Cladoceren, 61, t. 

 iii, fig. 7 (18U). Herrick. Final Report, 105 (1884). 

 Hal) Minnesota? (Herrick). 



X. PLBUBOXUS BAIRD. 



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

 (1811). Herrick. Final Report, 109 (1884). 



Ilab. Massachusetts (Birge). 



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

 Hob. Alabama (Herrick). 



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

 (1877). Herrick. Final Report, 110 (1884). 



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

 nesota and Alabama (Ilerrick). 



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

 Herrick. Final Report, 110 (1884). 



Hob. Massachusetts (Birge), Alabama (Ilerrick). 



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

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



113 (1884). 



Ilab. Massachusetts and Wisconsin (Birge), Minnesota (Ilerrick). 



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

 -Herrick. Final Report, 108 (1884). 



Ilab. Massachusetts (Birge). 



7. P. TOIDE^S Birge. Trans. Wis. Acad. iv, 97 (1877). 

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

 111 (1884). 



Hob. Wisconsin (Birge), Minnesota and Alabama (Herrick). 



XL CHYDORUS LEACH. 



1. C. (L^LATITS Schodler. Neue Beitrlige znr Naturge- 

 schichte der Cladoceren, 15, t. ii, fig. 44 (1863). Herrick. 

 Final Report, 117 (1884). 

 Hob. Minnesota (Herrick). 



