48 GARRETT: ON POLYNESIAN MITRID^E. 



longitudinally ribbed ; ribs small, rather distant, somewhat 

 angular, indistinctly constructed beneath the suture; inter- 

 stices with rather crowded, transverse impressed lines ; 

 aperture nearly half the length of the shell ; columella with 

 four plaits. 



Length 14 mill. (Mus. Godeffroy). 



Hab. Viti Islands. 



A single specimen found on the sands at Kioa Island. 



112. Turricula instricta sp. nov. 



Shell small, oblong, fusiform, slightly shining, cinereous, 

 with a dark line just beneath the suture, and the aperture 

 with a brown band ; spire moderate with slightly convex 

 outlines ; whorls 7 (?) ; (apex fractured), convex, last one 

 very slender towards the base, which is produced into 

 a recurved canal ; surface longitudinally ribbed, ribs 

 rather small, angular, about 14 in the penultimate whorl, 

 constricted just beneath the suture, forming a row of nodules; 

 interstices transversely impressly striated ; base granulated ; 

 aperture nan-ow, nearly half the length of the shell ; peris- 

 tome rather sharp, with a distinct sinus above; columella 

 with 4 plaits. 



Length 8 mill. (Mus. Godeffroy). 



Hab. Viti Islands. 



A single specimen found on the shore reef at Kioa Island. 



113. Turricula lyrata Lamarck. Reeve, Conch. Icon., pi. vii., 

 fig. 46. 



This beautiful species which only occurred to our 

 notice at the Samoa and A^iti Islands, is not by any means 

 common. All our living examples were found buried in 

 muddy-sand in the upper region of the laminarian zone. 



Our examples are more of an olive-gray tint than "ashy- 

 blue" as stated by Reeve, and the narrow brown bands are 

 constant. The aperture is bluish-white, the outer lip and 



