96 Gr. & H. Nevill — Descriptions of new Marine Mollusca. [No. 2, 



confirms our opinion that it appears to be new, the nearest he could find 

 being Eeeve's algida (Conch. Icon., fig. 145), from Moreton Bay, Australia ; 

 the present species hears a remarkable resemblance in many respects to N. 

 onutabilis, its thickness, different sculpture, rugose columella, &c. will, however, 

 distinguish it. At Ceylon and Penang we have found a variety which 

 approaches nearer to N. algida than the figured type form from Kutch. 



N. obesa, nobis, var. Ceylonica. 



More acuminate, less globose, suture more distinct ; longitudinal ribs 

 on the antepenultimate whorl more or less obsolete, transverse grooves on 

 the last two whorls almost obsolete; callosity on the columella a' shade 

 more defined and less rugose. 



Long, (perfect specimen) 19, diam. 10 mil. 



Ceylon and Penang. 



(Coll. Indian Museum and H. Nevill.) 



Nassa Peesica, v. Mart. 



Deshayesiana, Iss. 



A common shell both at Aden and the Andaman Islands. It is admirably 



described and figured in a most interesting and important paper by von 



Martens, published as a separate part of the ' Nov. Conchol.' under the title 



of ' Ueber vorderasiatische Conchylien. 5 



COLUMBELLA PAEDALHSTA, Lam. 



This most variable species abounds on the reefs at the Andamans, where 

 one of us collected many hundreds of specimens in all stages of growth. 

 Pure white specimens, exactly agreeing with Souverbie's figure, were abund- 

 ant, another very similar variety also occurs, white with a broad pale yellow 

 band round the last whorl (with or without a few yellow spots on the 

 spire) ; specimens marked like Eeeve's fig. 75 A. and C. are also common, 

 but considerably smaller and more compressed : this last variety may be 

 called Andamanica. 



Typical form, very common in Ceylon, long. 16f , cliam. 9 mil. 



Var. lactescens, Souv., J. de Conch. 1866, long. 13, cliam. 7 mil. 



Var. Andamanica, long. max. 12f, min. 10, diam. max. 6| min. 

 41 mil. 



Coltjmbella (Miteella) ealteata, n. sp., PI. VIII, Fig. 4. 

 Shell small, elongately fusiform, spire about the same length as the last 

 whorl, apex pointed, of a bright red colour ; light reddish brown, a single belt 

 of dark red in the middle of the whorls between the ribs, the ribs them- 

 selves in their centre are indistinctly white spotted ; whorls 7, the upper 

 ones smooth, the others longitudinally ribbed, ribs obsolete near the suture ; 



