2o6 H. B. Preston: New species of Shells. [Vol. II, 



Scintilla elongata, sp. nov. 



Shell oblong-elongate, nearly equilateral, rather convex, gaping 

 in the middle, concentrically striate, polished, semi-transparent 

 white, minuteh' freckled throughout with opaque milk-white spots ; 

 anterior side rounded ; posterior side somewhat angularh^ rounded ; 

 dorsal margin straight ; ventral margin contracted in the middle. 



mm. 



Long. 



6 



Lat. . . 



13 



Habitat — Andaman Islands. 





Scintilla perplexa, sp. nov. 



Shell oblong, nearly closed, semi-transparent, cream colour,, 

 finely, concentrically striate and bearing traces of very fine 

 oblique, transverse striae; anterior side obtuseh' angled ; posterior 

 side rather larger than anterior side, somewhat squarely rounded,, 

 expanded above and more inflated. 



Long. 



. . 



7 mm. 



Lat. 

 Habita 



t — Andaman Islands. 



II-5 „ 



• ' Scintilla translucida, sp. nov. 



Shell roundly ovate, moderately compressed, very thin^ 

 transparent, marked with very minute transverse striae and con- 

 centric lines of growth, some of which are milkj' white ; slightly 

 gaping at both ends ; umboes small, nearly central. 



Long. 



* . 



II mm 



Lat. . . 





15 „ 



Habitat- 



-Andaman Islands. 





Allied to S. jukesi, Desh., from Australia; the present species 

 is, however, much thinner, more transparent and more roundh^ 

 ovate; it is also polished,, whereas S. jukesi is quite dull and 

 opaque. 



Hemic ardium hystrix, Reeve, var. brevispinosa , var. nov. 



Distinguished from the t3^pical form by its much shorter and 

 more closely set spines, and by the absence of the scarlet lines in 

 the interstices between the ribs ; the pink colouring is also confined 

 to the extreme umbonal region and lateral margins. 



Habitat — Andaman Islands. 



All the specimens examined from the Andamans are identical' 

 in these respects, and it appears to be a well-marked local variety. 



