MELVILL: new species op fURRIDie. 171 



incrassate, without 5-ecliinate, within obscurely denticulate, sinus 

 fairly broad and conspicuous, columell-ar margin straight, multiplicate, 

 canal abbreviate, slightly recurved. 



Long. 21, lat. 7 mm. sp. max. ; long. 14, lat. 5 mm. sp. min. 



Hah. — Mauritius. 



I have for many years possessed this attractive little shell, 

 unnamed, also received further individuals in 1899 from Mr. J. H. 

 Ponsonby Fane, and later from Mr. Hugh Fulton ; this last con- 

 taining the largest example, the dimensions of which are mentioned. 

 The var. albescens is pure white, as just given above. {fievexupMi, 

 ready for battle, in fanciful allusion to the " militant " echi nations.) 



Pleurotomella borbonica, n.sp. (PI. V, Fig. 21.) 



Shell delicate, small, elegantly fusiform, rather narrow, and 

 gradually attenuate upwards, white, . semidiaphanous ; whorls 

 7-8, the nepionic or nuclear being smooth, white, and globose, 

 the third whorl elegantly but microscopically decussate, the 

 remainder angled a little below the sutures, delicately semi- 

 transparent, regularly cancellate, interstices quadrate, longitudinal 

 ribs of the body-whorl slightly oblique, mouth oblong, outer lip 

 incrassate, sinus well defined, broad but very shallow, columellar 

 margin fairly straight, canal short and a little recurved. 



Long. 8, lat. 3 mm. 



Hah. — I. Reunion (or Bourbon). 



A very beautiful and elegant species, perfect in form and 

 symmetry, allied to some Persian Gulf and Arabian Sea forms, 

 e.g. PI. enlimmes,^ Melv. 



EXPLANATION OF PLATES IV-V. 



^ Journ. Malac, xi, 1904, p. 84, pi. viii, fig. 15. 



