THE NAUTILUS. 



IX 



Unionidae, observations on the byssus of 



Velletia 



Vertigo andrusiana Pils. 



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



Vitrea, a new British .... 



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



Vitrina depositing eggs 



Volvaria avena var. southwicki Davis, n. v, 



Wolcott, Mrs. Henrietta H. T. . 



76 



14 

 131 

 118 



12 

 117 



91 

 128 



83 



