NEllITA. 115 



alba, intus dentibus plicisque magnis coutracta. — This might 

 be taken for a miuature of N. jplicata, but is much smoother, 

 in well-developed specimens it is equally contracted in the 

 inner part of the aperture by salient teeth. Hence its name 

 'grinuing.' 



57. VEESicoLOR, f. 20, 21, 114, Lamarck. — Subglobosa, 

 subplanulatim costata, griseo nigro vel purpureo tessellata 

 aut aliter variegata ; spira frequenter subelevata, acumioata, 

 anfractibus ad suturam elevatis, tum excavato-depressis ; 

 apertura angusta, columella arcuatim producta, rudissime 

 dentata; labio externo intus fortiter dentato et plicato. — ■ 

 The ribs are much more depressed and undefined than in 

 N. plicata, but the teeth and plaits of the mouth are nearly 

 as prominent and strong. The varieties are tessellated or 

 otherwise variegated with black, grey, and purple. 



58. QUADRicoLOR, f. 1 4, Gmelin. — vato-subglobosa, tenuiter 

 et concinne lirata pallidissime purpurea, liris nigro tessellatis, 

 spira flavida, acuminata, anfractibus ad suturam elevatis, tum 

 depressis ; area columellari tumida, rugata, aurantio tincta, 

 margine valide dentato ; labio externo intus tenuiter crenato 

 superne bidentato. — The ribs are small and neatly tessellated, 

 the spire is more gradually shelving than in N. pelovonta. 

 The columella is wrinkled and is not hollowed and blood- 

 spotted as in that species. 



59. PELORONTA, f. 30, .31, Llnnceus. — Ovata leviter et 

 nonnunquam obsolete costata, lutea, purpureo nigroque 

 flammulata ; anfractibus superne subdepressis, columella 

 excavata, medio sanguinea, dentibus marginalibus conspicuis, 

 labio externo subquadratim expanse, intus supra infraque 

 conspicue dentato. 



60. GEMMULATA, f. 62, Reeve. — Oblique globosa, grisea, 

 liris tenuissimis, acute granulatis, distantibus, nigro et 

 cgeruleo fasciatis et tessellatis ; spira exsertiuscula, apertura 

 oblique producta, Isevi, subcserulea, edentula. — The ' gemb ' 

 consist of the little sharp granules on the thread-like ridges ; 

 the aperture is of a bluish tint, smooth, and without teeth. 



61. UNDATA, f. 5, Gmelin. — Solida, globoso-acuminata 

 tenuiter lirata, fulvo-nigrescens, fusco nigro alboque un- 

 datim variegata ; spira acuminata ; apertura alba, area coh- 

 mellari tumida rugata et granulata, margine rude dentato, 



D D 



