148 



ON NEW SPECIES OF HEMIPLEGTA AND XESTA FROM THE 

 XULLA {= SULLA OR SULA) ISLANDS, WITH NOTES ON 

 OTHER SPECIES FROM THE SAME LOCALITY. 



By Hugh C. Fulton. 



Bead 14:th January, 1921. 



Hemiplf.cta ambitiosa, n.sp. 

 Shell conoid, solid, of a dark brown colour, with a narrow yellow 

 spiral band situated just below the periphery of the last whorl; 

 whorls 6|, slowly increasing, the suture of the last two sharply 

 defined by a thread-like line, first three almost smooth, lower whorls 

 finely rugose and somewhat malleated ; aperture ovate, interior 

 whitish ; peristome simple, broadening suddenly at columellar 

 insertion and almost covering the very narrow umbilicus. Diam. 

 mai. 29. alt. 28 mm. 



Habitat Manguli, Xulla Ids. (W. F. C. Frost). 



Type in British Museum. 



This somewhat remarkable new species has a striking superficial 

 resemblance in form and colouration to the Ceylon shell Etiplecta 

 gardneri, but lacks the characteristic sculpture of Euplecta. It is 

 probably the shell referred to by Mr. M. M. Schepmann in his paper 

 " On a collection of land and freshwater mollusks from Taliabu 

 (Xulla Ids) " (Notes from the Leiden Museum, vol. xxviii, p. 120, 

 July, 1906) with doubt as Xesta trochus, Miiller. 



Xesta rufostrigata, n.sp. 



Shell depressed globose, very narrowly umbilicated, rather thin, 



surface somewhat dull, almost smooth, the lines of growth only 



visible by aid of the lens, nuclear whorls flesh coloured, the remainder 



of a cream ground covered with oblique, narrow reddish-brown 



