14 TIABID.E. 



spira eroso-decollata (specim. adult.) ; anfract. 5-6 incolumes sub- 

 plamilati, Inevigati, sutura subcanaliculata, angusta marginata 

 divisi, ultimo magno, basi obtuse angulato, circa columellam striato. 

 Apertura pirit'ormis, superne acute angulata, basi producta, late 

 effusa, columella torta, margine dextro recto, basali arcuato. 

 Opercul. subspiraturn, nucleo basali, marginal!. 



Testa jnvenilis spira subintegra, colore fusco-corneo ; aufr. 

 ultimus basi angulatus, parte mediana fusco tinctus. Anfr. 

 circa 11, supreini lougitudinaliter crebre striati, striis sensim 

 evanescentibus. 



Dim. specim. adult, decollate (anfr. 5-6). 



Alt. 54, diam. 13 mm. 



Aperture : alt. 18, diam. 10 mm. 



Dim. specim. juv. (ant'r. circa 11), 



Alt. 37, diam. 8 mm. 



Hab, Nicobars (Roepstorff). 



Var. nana, Nevill, torn. cit. 



" Strongly decollate, only 3 or 4 whorls remaining." 



Alt. 29-5', diam. 10-5 mm. 



Hab. Great Nicobar (Roepstorff). 



Var. solidiuscula, Nevill, torn. cit. 



"A very distinct variety, slightly decollate, 6 whorls ; 



constantly distinguished from the preceding by its greater 



solidity and by the less convex whorls, especially noticeable in the 

 last one." 



Alt. 37, diam. 11 '5 mm. 



Hab. Andamans (Roepstorff) . 



25. Tiara (Radina) charon (Preston}. 



Tiara (Radina) chat-on (Preston), Ilec. Ind. Mus. ii, p. 196, pi. 15, 

 tig. 22. 



Shell elongately subulate, dark brownish black ; remaining 

 whorls 12, convex, marked throughout with lines of growth and 

 spirally sculptured with faint, somewhat distant raised stride ; 

 sutures well impressed ; columella descending in a rounded curve 

 and extending into, a slight callus which reaches the lip above ; 

 peristome simple ; aperture oblong-ovate ; interior slate-colour. 



Alt. 56, diam. maj. 12 mm. 



Aperture, alt. 11*75, diam. 7 mm. 



Hab. Andaman Islands. 



26. Tiara (Radina) expatriata (Preston). 



Tiara (Radina) expatriata (Preston), Rec. Ind. Mus. ii, p 196 

 pi. 15, fig. 23. 



Shell subulately turreted, dark blackish brown; remaining 

 whorls 4|, spirally striated on the lower half of the upper whorls ; 



