10 FAUNA OF NEW ENGLAND. 



HYDRACHNIDAE. 



Hydrachna globator Miiller, Zool. Danicae prodr. 1776, p. 188. 

 " DENMARK." 



MASS. Wood's Hole. 



41. ARRENURUS PARALLELLATUS Marshall. 



Marshall, Trans. Wis. acad., 1903, vol. 14, p. 154, pi. 16, fig. 18, 

 pi. 18, fig. 6. "WOOD'S HOLE, MASS." 



MASS. Wood's Hole. 



42. ARRENURUS SECURIFORMIS Piersig. 



o 



Piersig, Zool. anz., 1894, vol. 17, p. 378. "GERMANY." Marshall, 

 Trans. Wis. acad., 1903, vol. 14, p. 152, pi. 18, fig. 4. 



MASS. Wood's Hole. 



43. KOENIKEA CONCAVA Wolcott. 



Wolcott, Trans. Amer. micros, soc., 1900, vol. 21, p. 190, pi. 11, 

 fig. 15-22. "LAKE SAINT CLAIR, MICHIGAN * * * SUSAN AND 

 '26' LAKES, NORTHERN MICHIGAN * * * REED'S, FISK'S, LAM- 



BERTON, POWER'S, AND DEAN'S LAKES, NEAR GRAND RAPIDS, 



MICHIGAN." 



MASS. Cranberry Lake, Wood's Hole. 



44. PlONA DEBILIS (Wolcott). 



Curvipes debilis Wolcott, Trans. Amer. Micros, soc., 1902, vol. 

 23, p. 234, pi. 32, fig. 44-46. "CRANBERRY LAKE, WOOD'S HOLE, 



MASS." 



MASS. Cranberry Lake, Wood's Hole. 



