52 ON THE NAIADES, 



Hab. Java? 



My Cabinet. 

 Diam, -9, Length -6 of an inch. 



Remarlis. — The solidity, smoothness and purple colour of this spe- 

 cies, which is supposed to have been of Mr Shillaber's collection, will 

 serve to distinguish it. Like the mamilla^ herein described, it has a 

 thick lip and is impressed at the base of the columella. The two 

 specimens which I have differ much in the arrangement of colour. 

 In one the inferior portion is almost white, and a dark interrupted band 

 encircles the middle of the whorl. 



Helix ovum reguli. Plate XIX. fig. 61. 



Testa super et siibtiis planulatd, colore columbino tinctu, minutis irregularibus 

 maculis nurnerosis, imp erf or at a ; anfractibus quaternis; spird valde depressd ; 

 aperlurd subovaid, intus pwpurascenti ; labro acuto, subrejlexo ; columella lasvi, 

 ad basin subconcavd. 



Shell flattened above and below, dove coloured, with numerous irregular minute dots, 

 imperforate; whorls four; spire much flattened; aperture suboval, purplish inside; 

 outer lip somewhat reflected but sharp ; columella smooth, at base impressed. 



Hab. Java? 



My Cabinet. 

 Diam. -8, Length '4 of an inch. 



Remarks. — The very peculiar colour and the minute dots of this 

 beautiful and interesting species eminently distinguish it from all other 

 species which have come under my notice. The line of the superior 

 part of the lip is almost parallel Avith the corresponding inferior part, 

 and the outer posterior is consequently more round. In my specimens 

 there are two very indistinct bands, rather lighter than the ground. 

 In colour it greatly resembles a spotted small egg of a bird. It is sup- 

 posed to have come from Mr Shillaber's collection. 



