RISSOIDH. 109 
1 Japan’ [typical] ; ex Mr. R. Damon [coll. A. Adams]. 
Seems to be an immature specimen ; long. 24, diam. 1} mil. 
20. Alvania badia [?]. 
Alvania badia, 4. Adams, Ann. Mag. VIII, 1861, Kalahai and Shan-tung. 
1 Japan; ex Mr. Damon [coll, A. Adams]. 
21. Alvania ferruginea. 
Alvania ferruginea, 4. Adams, Aim. Mag. VIII, 1861, Yesso, 7 fths. 
2 Japan [typical] ; ex Mr. Damon [coll, A. Adams]. 
Long. 3, diam. 1} mil. A true ‘Alvania, agreeing with the 
original description. 
22. Alvania fenestrata. 
Rissoa fenestrata, Krauss, Sud-Afrik. Moll. 1848, “ on the byssus of Pinna 
squamifera,” Emb. River Kysna—1‘5, 0'8 lin, [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 u. sp- 
3 Mauritius; coll. G. Nevill, Esq. 
Closely allied to the next species. 
25. Alvania mauritiana. 
Alvania mauritiana, von Martens, Mébius, Mauritius, 1880—long. 13, diam, 
& mil. 
2 Mauritius; coll. G. Nevill, Esq. 
