1875.] G. & H. Nevill— New species of Marine Mollusca. 183 



Gytliara Isseli. 



Thick, ovately conical, apex pointed ; white, orange banded in the 

 middle of the whorls ; whorls seven, reticulated ; columella nearly straight, 

 with a moderate callosity, closely rugose ; aperture narrow, sinus moderate, 

 outer lip thick, transversely striated. 



A decollated specimen of 4 whorls only — Long. 7f, diam. 4 mil. 

 Ceylon. 



Var. Cernica. 



A perfect specimen — Long. G^, diam. 2| mil. Mauritius. 



JVassa ooesa. 



Thick, globosely conical, spire pointed ; brown marbled indistinctly 

 with white, stained near the suture dark brown, coloured exactly like 

 Reeve's fig. of N. mutabilis, L. ; whorls 10, longitudinally obliquely, thickly 

 ribbed, ribs more or less obsolete on the back of the last whorl ; transverse- 

 ly distantly grooved, some of the grooves more deeply incised than -others, 

 the upper ones form two rows of more or less granulose ridges beneath the 

 suture. Allied to Reeve's N. algida. 



Long. 22, diam. 14 mil. Kutch. 



Var. Ceylanica. 



Smaller, more acuminate, less globose, with the suture more distinct ; 

 sculpture more obsolete. 



Long. 19, diam. 10 mil. Ceylon, Penang. 



Columbella (Mitrella) balteata. 



Small, elongate, fusiform ; spire about the same length as the last 

 whorl ; light reddish-brown, apex red, a single belt of dark red in the mid- 

 dle af the whorls between the ribs, these latter are indistinctly white spot- 

 ted in their centre ; whorls 7, longitudinally ribbed, transversely striated, 

 grooved below the suture ; columella simple and twisted, outer lip acute, 

 slightly emarginate above. 



Long. 5, diam. If mil. Mauritius. 



Zafra jpolita. 



Slenderly fusiform, smooth, attenuated at both ends ; spire contorted, 

 nearly as long as the last whorl ; white, with two bands of irregular opaque 

 white flakes on each whorls ; whorls six, striated at base of last whorl only ; 

 outer lip remarkably thick and bent in, making the aperture peculiarly 

 contracted. 



Long. 3£, diam. 1-| mil. Mauritius. 



Zafra semiscutyta, 

 Turretcd, narrowly lanceolate, apex pointed ; spire a little longer than 

 the last whorl ; horny-brown throughout, whorls seven, longitudinally 



