NATICA. 25 



covered by a broad callosity ; whitish, with two broad chocolate 



bands and a row of spots between them. 



Australia. 

 X. DILLWYNI, Payr. PL 6, figs. 5, 8 ; PI. 5, fig. 78. 



Yellowish or fawn-white, with white bands bearing obscure 

 arrow-head markings of light chestnut ; umbilical region whitish, 



partly filled by a callus. 



Mediterranean Sea. 



The original figure (fig. 8) represents an obscurely colored 

 state of this species. N. avellana, Phil. (fig. 78) is a nut-brown 

 variety, the bands obsolete. The late Dr. J. Gwyn Jeffreys 

 considered N. proximo, C. B. Ad., a synonym. 



X. AREOLATA, Recluz. PI. 6, fig. 23. 



Shell rather thin, polished ; yellowish brown, with lighter 

 zigzag markings ; umbilicus with a large white entering callus. 



Length, 15 mill. 



Australia, Philippines, Moluccas, Viti Is. 



X. ABBBEVIATA, Sowb. PI. 6, figS. 6, 7. 



Livid, bifasciately maculated, white-banded and slightly 

 wrinkled at the suture ; umbilicus closed by the callus ; aperture 



chestnut Avithin. Length, 12 mill. 



? Mediterranean Sea. 



Possibly a form of one of the well-known European species ; 

 only known to me by Sowerby's figures. 



X. MARMORATA, H. Adams. PI. 6, fig. 9. 



Whitish, marbled with chestnut and somewhat fiammulate at 

 the suture, a lighter marbled band on the periphery ; umbilicus 

 partly reduced by the superior callus; columellar callus and 

 interior tinged with chestnut. Length, 16 mill. 



Canary Islands, Mediterranean. 



It is N. Pretoi, Hidalgo. 



X. VITTATA, Gmelin. PL 6, figs. 10-12. 



Yellowish brown, vittate with chestnut, or laciniated ; umbili- 

 cus with a central entering ridge. Length, 20 mill. 



Morocco, Algiers, So. Coast of Spain. 



N. textilis, Reeve (fig. 12), and N. intricatoides, Hidalgo, are 

 synonyms. 



