1 1 4 RISSOID^. 



1. Penella rufoeincta. 



Dunkeria rufoeincta, A. Adams, Ann. May. VIII, 1S61, Mososeki, Tahane 

 and Takano-Sima; Suez, fide WAndreiv. 



2 Japan ; ex Mr. R, Damon [" coll, A. Adams "]. 

 Long. 3|, diam. \\ mil. 



2. Penella rissoiformis. 



Chryssalida rissoiformis, Issel, Malae. Mar Rosso, 1869, Suez; long. 2k, 

 diam. 1 mil. 



2 Massaua ; coll. Prof. A. Issel. 



2 Andaiuiins ; coll. G. Nevill, Esq. 



1 Roweiah, Red Sea; coll. J. B. Baxter, Esq. 



This last is a rather narrower form. 



3. Fenella cerithina. 



Rissoa cerithina, Philippi, Zeiis. Mai., 1849, p. 34, Aden— long, if ; ? var. 

 =F. scabra, A. Ad. 



50 Mauritius; coll. G. Nevill, Esq. [3J, 1]. 



5 Suez ; coll. Prof. A. Issel and J. B. Baxter, Esq. 



8 Aden ; coll. Dr. F. Stoliczka and G. Nevill, Esq. 



2 Natal ; coll. G. Nevill, Esq. 



Herr Schwartz identified these Natal specimens as F. exour- 

 vatii [nbi ?] ; Gould speaks of an Alvania excurvata, Cpr. 



10 Oman and Tawila [Persian Gulf] ; coll. W. T. Blanford, Esq. 



var. [ ? dist. sp.]. 

 26 Singapore; coll. Dr. P. Stoliczka. 



var. scabra. 



Dunkeria scabra, A. Adams, Ann. Mag. VI, 1860, p. 421, Tsu-sima, Anfr. 



8\, [" liris elevatis tribus"'} ; Suez, fide McAndretv, 



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

 Long. 2|, diam. 1 mil., the other rather larger. 



