XXIII. —DESCRIPTIONS OF NEW SPECIES 

 OF IvAND, MARINE AND FRESHWATER 

 SHELLS FROM THE ANDAMAN 

 ISLANDS. 



By H. B. Preston, F.Z.S. 



The species described in the present paper formed part of the 

 collection of the late Rev. J. Warneford who was, for many years, 

 Chaplain to His Majesty's Forces in the Andaman Islands, and 

 an ardent and indefatigable collector ; the collection took twelve 

 years to amass, and is perhaps the largest ever got together on 

 those Islands. The ''types" have recently been acquired by the 

 Trustees of the Indian Museum, in whose collection they now are. 



Sitala denselirata, sp. no v. 



Shell perforate, conical, carinate at the periphery, opaque, 

 pale yellowish horn colour ; whorls 6^, rather convex, sculptured 

 with fine spiral lirse ; base of shell somewhat convex, spirally 

 striate ; columella straight, refiexed over the very narrow 

 umbilicus, peristome acute; aperture sub-quadrate. 



Altitude 



Diam., major . . . 



Aperture, alt. . . 



,, diam. 

 Habitat— Andaman Islands 



6 mm. 

 6-25 ,, 

 2-25 ,, 

 3 



Approaching 5. attegia, Benson' {= cadelli,'^Q:v. MS.). The 

 spire is, however, less acuminate and in general shape the shell is 

 much narrower in proportion to its height ; the carination is also 

 not so marked and the spiral sculpture is coarser than in 5, attegia. 



Tornatina conspicua, sp. nov. 



Shell imperforate, regularly cylindrical, white, shining, covered 

 with a rich reddish brown periostracum ; spire somewhat exserted ; 

 whorls 6, the last sculptured with fine, wavy spiral striae ; sutures 

 deeply and broadly channelled ; aperture narrow, scarcely dilated 

 below, a thickening of the shell appearing about half a millimetre 

 from the edge of the peristome ; peristome slightly inflated in the 

 middle, acute ; columella arched, terminating in a basal fold, a 

 callus extending from it to the suture. 



i dim. Mag. Nat. Hist. (3), iii, p. 184, 1859. 



