416 



" Shell ovate, oblong, considerably ventricose, orange, saffron 

 colour or chesnut, marbled with white. Spines broad, open, and 

 somewhat distant. Pillar with three plaits. Epidermis brown. 

 Aperture wide, of an orange colour." 



Moreton Bay, in New Holland. 



10. Melo umbilicatus (pi. lxxxii. f. 18. pi. lxxxiii. f. 29, 

 30.), Brod. 



" M. testa, ventricosissima, subcompressa, flava albo-marmorata, 

 vel alba, fiavo reticulata, bifasciata, fasciis transversis nigro-casta- 

 neis, subtessellatis ; spira apicem longe prsetereunte, spinis magnis, 

 raris; apertura latissima; columella quadriplicata ; epidermide 

 pallide virescente, tenuissima; long. lat. 9. poll. 



" Shell very ventricose, somewhat compressed, yellow or reddish- 

 yellow, marbled with white, or white reticulated with the same colours, 

 girt with two narrow, blackish chesnut, somewhat tessellated bands. 

 The spire projects far beyond the apex, which in old specimens is 

 seen as it were at the bottom of an excavation, while in very 

 young shells it projects beyond the spire. The spines are large, 

 long and somewhat distant. The aperture, which is of a light 

 yellow, or very pale orange, is very wide, measuring upwards of 

 six inches and a half in old individuals. The pillar has four plaits, 

 in some very young shells, and in all the old ones which I have 

 seen ; those of intermediate growth have generally but three. As 

 the shell increases in growth the colours become less vivid, and 

 the bands more interrupted, till at last both are almost lost." 



Moreton Bay, New Holland. 



LIST Of FIGURES IN PLATES LXXXI. TO LXXXIII. 



1, 2, 3, 4, 5. M. Indicus, sp. 1. 



6, 7, 8. — tessellatus, sp. 2. 

 9, 13, 14, 19. — iEthopicus, sp. 3. 

 10, 11, 12. — nauticus, sp. 4. 



15, 21, 22. — arniatus, sp. 6. 



16, 17, 20. — diadema. sp. 5. 



18, 29, 30. — umbilicatus, sp. 10. 



23, 28. — auicronatus, sp. 9. 



24, 25. — Miltonis, sp. 7. 

 26, 27. — Eroderipii, sp. 8. 



