RISSOID2E. 109 



I Japan [typical] ; ex Mr. K. Damon [coll. A. Adams]. 

 Seems to be an immature specimen ; long. 2|, diam. 1J mil. 



20. Alvania badia [?]. 



Alvania badia, A. Adams, Ann. Mag. VIII, 1861, Ealahai and, Shan-tung. 



1 Japan; ex Mr. Damon [coll. A. Adams]. 



21. Alvania ferruginea. 



Alvania ferruginea, A. Adams, Ann. Mag. VIII, 1861, Tesso, 7 fths. 



2 Japan [typical] ; ex Mr. Damon [coll. A. Adams]. 



Long. 3, diam. If mil. A true Alvania, agreeing with the 

 original description. 



22. Alvania fenestrata. 



Rissoa fenestrata, Krauss, Sud-AfriJc. Moll. 1848, " on the byssus of Pinna 

 squamifera" Etnb. River Kysna1'5, 0'8 tin. [not of Gould]. 



2 Port Natal; coll. G, Nevill, Esq. 



23. Alvania n. sp. 



10 Mauritius ; coll. G. Nevill, Esq. 

 Long. 2, diam. 1 mil. Near the preceding. 



24. Alvania n. sp. 



3 Mauritius; coll. G. Nevill, Esq. 

 Closely allied to the next species. 



25. Alvania mauritiana. 



Alvania mauritiana, von Martens, Molius, Mauritius, 1880 long. 1\, diam. 

 %mil. 



2 Mauritius ; coll. G. Nevill, Esq. 



