PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1886. 



EXPLANATION OF PLATE m. 



Fig. 1. Aquilonaria turneri Dall, dentition. 



Fig. 2. Aquilonaria turneri Dall, animal, 6-1, page 204. 



a, line of margin of shell (removed), page 204. 



b, anal papilla, page 204. 



Fig. ^. Aquilonaria turneri Dall, shell 4-1. 

 Fig. 4. Bela solida DalK page 301. 

 Fig. 5. Alvania castanella Dall, page 307. 

 Fig. 6. Mangilia aleutica Dall, page 299. 

 Fig. 7. Bela Itevigata Dall, page 300. 

 Fig. 8. Ouoba saxatilis MoUer, page 306. 

 Fig. 9. Ciugula var. martyni Dall, page 306. 

 Fig. 10. Velutina conica Dall, page 305. 

 Fig. 11. Onoba aleutica Dall, pago 307. 



