348 Illinois State Laboratory/ of Natural Histonj. 



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

 iii, fig. 7 (lS14:).—Herrick. Final Report, 105 (1884). 

 //«/>.— Minnesota? (Iferrick). 



X. Pleuroxus Baird. 



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

 {lS11).—HerricJ:. Final Report, 109 (1884). 



IFah. — Massachusetts {Birge). 



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

 Hah. — Alabama {Ilerricl). 



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

 ( 1S11).— Her rick. Final Report, 1 10 ( 1884 ). 



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

 nesota and Alabama {Ilerrich). 



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

 —Her rich. Final Report, 110 (1884). 



Hah. — Massachusetts {Birge), Alabama {Herrick). 



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

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



113 (1884). 



Hah. — Massachusetts and Wisconsin [Birge), Minnesota {Herricl). 



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). 



Hah. — Wisconsin {Birge), Minnesota and Alabama {Herrick). 



XL Ohydorus Leach. 



1. C. c.^LATUS Schiidler. Neue Beitrage znr Naturge- 

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

 Final Report, 117 (1884). 

 Hah. — Minnesota {Herrick). 



