RISSOID-^. 109 



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

 Seems to be an immature specimen ; long. 2^, diam. Ij mil. 



20. Alvania badia [?]. 



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



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



21. Alvania ferruginea. 



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



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



Long. 3, diam. 1| mil. A true Alvania, agreeing with tlie 

 original description. 



22. Alvania fenestrata. 



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

 squamifera" Emb. River Kysna — 15, 0'8 lin. [jiot of Gould}. 



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



23. Alvania n. sp. 



10 Mauritius ; coll. G. NeviU, 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, Mobius, Mauritius, 18S0 — long. 1^, diam, 

 f mil. 



2 Mauritius ; coll. G. Nevill, Esq. 



