NATICA. 89 



81. KAViDA, f. 53, Souleyet. — Globosa lutea; sjDira brevi, 

 subpyramidata ; apertura semilunari, labio interne latissime 

 expanse et calloso dimidiatim umbilicura tegenti. — A round, 

 onion-shaped shell, with small though pyramidal spire. The 

 wide callus is almost truncated diagonally across the upper 

 part of the umbilicus. 



82. poRCELLANA, f. 126, D'Orhigny. — Ovato-pyramidata, 

 pallide grisea, ad suturam et infra albo fasciata ; columella 

 conspicue et late callosa, lobo umbilicum angustum partim 

 tegenti, — The main part of this shell is pellucid grey, but at 

 the suture and on the lowest part of the last whorl there are 

 opaque white bands. 



83. CAEiBB^A, f. 165, Philippi. — Ovato-oblonga grisea, 

 ad suturam albifasciata ; spira conica, producta ; apertura 

 pyriformi, columella callosa simplici, umbilico angusto. — 

 Smaller in size, but of similar form to N. Gallaparjosa ; of a 

 violet-grey colour, with sutural white band ; columellar callus 

 spread narrowly over body-whorl, and covering very little of 

 the narrow umbilicus. 



84. GALLAPAGOSA, f. 95, Recluz. — Ovato-oblonga grisea 

 castaneo tincta ; spira brevi conica, anfractibus ad suturam 

 unifasciatis, valde declivibus ; umbilico elongato ; apertura 

 castanea elongata, columella alba, callo umbilicali albo an- 

 gusto. — Of the same texture and colour as in tlie didyma and 

 olla groups, but narrow and pointed, with a nearly upright, 

 narrow umbilical callus. 



85. FUSCA, f. 104, Carpenter. — A larger shell than the 

 preceding, with a less defined band at the suture. 



86. vioLACEA, f. 11, Soiverhy. — Grloboso-subpyramidata, 

 Bolida, pallida, maculis subquadratis castaneis quinquefariam 

 tessellata ; ultimo anfractu supra aperturam subangustato ele- 

 vato ; columella ad umbilicum late callosa purpurea, umbilico 

 angusto, fere clause. — The five rows of spots are more or less 

 square, so as to have a tessellated appearance. The colu- 

 mellar callus is long and thick, and coloured with purple. 



87. SEMisuLCATA, f. 59, Oray. — Parva alba oblique sub- 

 quadrata ; spira brevi, anfractibus ad suturam tumidis, turn 

 spiraliter tenuisulcatis ; apertura subtrigona, columella sub- 

 tortua, medio lobata, umbilico latiusculo. — An open-mouthed 



