10 FAUNA OF NEW ENGLAND, 



HYDRACHNTDAE. 



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

 " Dexmark." 



INIass. — Wood's Hole. 



41. Arrenurus parallellatus jNIarshall. 



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. Arrentjrus securiformis Piersig. 



Piersig, Zool. anz., 1S94, vol. 17, p. 378. "Germani." Marshall, 

 Trans. Wis. acad., 1903, vol. 14, p. 152, pi. 18, %. 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- 

 bertox, Power's, and Dean's Lakes, near Grand Rapids. 



MiCHIGAX." 



INLvss. — Cranberry Lake, Wood's Hole. 



44. Piona debilis (Wolcott). 



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

 23, p. 234, pi. 32, fig. 44-46. "Cranberry Lake, Wood's Hole, 

 ]\Lvss." 



Mass. — Cranberry Lake, Wood's Hole. 



