74 RISSOID^l. 



subvar. cincta. 



Rissoina cincta, Dunlcer, Cat. Mus. Oodef. IV, 1869, Upolu ; op. cit. V, as var. 

 of R. pusilla. 



13. Mauritius, Ceylon, Arakan and Andamans; coll. W. T. Blnnford, 

 J. B. Baxter, J. Wood-Mason, and G. Nevill, Esqrs. 



var. perpusilla, nov. 

 Long 3 T V, diam. 1J mil. 



26 Mauritius [type var.] ; coll. O. Nevill, Esq. 

 3 Bombay and Henjain [Persia] ; coll. W. T. Blanford, Esq. 



var. myosoroides. 



R. myosoroides, Recluz,Jide Schwartz, pi. IV, fig. 30, Mauritius. 



30 Arakan, Mauritius, Ceylon, Natal, Andamans, and Singapore; coll. 

 F. Stoliczka, J. Wood-Mason, and G. Nevill, Esqrs. 



2. Bissoina pusilla. 



Turbo pusillus, Brocchi, Conch. foss. II, 1814. 



3 Steinabrun [fossil] ; coll. Herr G. Schwartz von Mohrenstern. 



The callosity of the outer lip and the twist of the colmnella 

 are much more developed than in the preceding species ; it is, 

 however, most closely allied and perhaps scarcely specifically 

 separable ! 



3. Bissoina woodmasoniana, n. sp. 

 1 Andamans [type] ; coll. J. Wood-Mason, Esq. 



A single living specimen of this remarkable new form was 

 dredged by Mr. Wood-Mason, if I remember rightly, in deep 

 water. Nine whorls, cylindrical and "needle-like," the apical 

 three smooth and colourless, the others longitudinally closely 

 ribbed, ribs thick, flexuous and irregular ; of a uniform brown 

 colour throughout ; columella straight, aperture contracted, 

 subangulate at base, not notched, resembling that of species 

 of Zippora. 



Long. 3, diam. f mil. 



