Plate V. 



(M. C. Z., ^Museum of Comparative Zoology. The illustrations are reduced.) 



Page. 



Figs. I. Fusus dupetit-thouarsii vav. nodosus (M. C. Z. 913 type) 46 



2 and 3. Fusus dupetit-thouarsii (M. C. Z. 910, 913) 47. 



4. Fusus dupetit-thouarsii, transitional variety (M. C. Z. 913) 47 



5. Fusus dupetit-thouarsii var. aplicatus (M. C. Z. 913, 912 type) 47 



(i66) 



