HELICINA.— Plate XXI. 



Species 186. (Fig. a, b, Mus. Brit.) 



Heucina variabilis. Hel. testa angulatd, ventricosd, 

 spiraliter striata ; purpurea oel ruhrd late fasciata, 

 vel albd ; spird elevatd, conica ; ultimo anfractu 

 medio carinato, ad carinam et infra alho fasciato ; 

 aperturd rhomboided ; labio externa expanse, supra 

 medium angidato. 



The variable Helicina. Shell angular, ventricose, 

 spirally striated ; broadly banded with purple or 

 red, or white ; spire raised, conical ; last whorl 

 keeled in the middle, banded white on the keel 

 and below ; aperture rhomboidal ; outer lip ex- 

 panded, angular above the centre. 



Wagner. Spix, Brazil, p, 25. 



Helicina zonata, Sowerby. 



Helicina fasciata, Spix. 



Helicina flava, Spix. 



Uab. Brazil. 



Species 187. (Fig. a, b, Mus. Brit.) 



Helicin.\ Nicobarica. Hel. testa parvd, compressd, 

 anijulatd, pallida fused, fasciis ruhris, angustis, 

 sjnralibus, supra angulum anfractuum duabvs, 

 infra un&, taniatd ; ultimo anfractu depresso, 

 carinato ; aperturd parvd ; columelld minutd, albd ; 

 labio externa angusto, alho, medio i-otundatim 

 angulato. 



The nicobar Helicina. Shell small, compressed, an- 

 gular, pale brown, ribanded with narrow red 

 spiral bands, two above one beneath the angle 

 of the whorls ; last whorl depressed, keeled ; 

 aperture small ; columella minute, white ; outer lip 

 narrow, white, roundly angular in the middle. 



Philippi. Zeitschrift fur Blalakologie. 



Helicina Merguiensis, PfeifFer. 



Helicina Andamanica, Benson. 



Hah. Andaman Islands. Siam. 



