THE NAUTILUS. IX 



Unionidae, observations on the byssus of . . . .76 



Yelletia . . . .14 



Vertigo andrusiana Pils. . . . . . . .131 



Vertigo japonica Pils. & Hir., n. sp. ..... 118 



Vitrea, a new British ........ 12 



Vitrea radiatula var. radiata Pils. & Hir., n. v. . . .117 



Vitrina depositing eggs ....... 91 



Volvaria avena var. southwicki Davis, n. v. . . . 128 



Wolcott, Mrs. Henrietta H. T 83 



