538 



whorls gently sloped, thick, white, with strong black, longitudinal, 

 undulating, and interrupted lines and bands; columella thick, 

 with an orange brown tint near the outer edge, tlie inner edge 

 toothed, with a short sinus in the centre ; operculum black. Of the 

 two specimens figured, one is more and the other less conical than 

 the average. 



Banks of the Ganges, Calcutta. 



103. Nekitina communis (pi. cix. f. 14-25), Q,imy et Gaim. 

 Voy. Astrol. N. elegantina, Vhilippi, Abbildungen, p. 25. 1. 1. f. 3. 



N. testa ovali, subconica, N. SmUhii simili, sed anfractibus 

 miniis rotundatis, labio externo prope suturam elevato ; columella 

 miniis tumida, vix arcuata; epidermide tenuissima; testa varic picta. 



Of a more oval form than N. Smithii, with the slope of the 

 spire more gradual ; the columella is not nearly so gibbous, and 

 scarcely arched ; the outer Hp has a slight elevation near the 

 suture, is thinner and rather more expanded ; the external surface 

 is variously painted. 



Island of Siquijor, Philippines; on stones in a small stream. 

 Cuming. 



104. Neritina plumbea (pi. cxii. f. 119, 120), Uecluz, ]\IS. 

 N. Nux, Brod. ? 



N. testa N. communi simili, sed magis globosa; apertuia 

 ma j ore. 



A more ventricose shell than N. commtmis, and with a larger 

 aperture. The tyjncal variety is of a leaden colour ; anotlier is 

 of a lemon tint, and the other is olive, with dark broad bands. 



Island of Bohal, Philippines. Cimiing. 



105. ISTeritina Zebra (pi. cxii. f. 96, 97), Lam., Anim. s. 

 vert. ISTerita, no. 4. 



N. testa globosa, subconica, glabra, epidermide crassa induta, 

 fasciis peroblifiuis picta ; a])ertura magna, labio externo intiis in- 

 crassato ; coliunella subgibbosa, in medio paululum arcuata, den- 

 ticulata. 



Of a subglobose form, with tlie spii'e inclining to conical, not 

 very tliick, covered with a rather thick e])i dermis, through which 

 very oblique black bands are seen. The aperture is large ; the 

 outer Kp thin near the edge, but thickened within ; the columella 

 of a dull smoky-brown colour, not much thickened, slightly 

 arched in the centre of the edge, and denticulated. 



Tahiti. 



