524 tkochid^:. 



the umbilicus is large, deep, funnel-shaped, white, and 

 externally defined by a spiral hollow. The aperture is 

 squarish, and much broader than it is long; its vertical 

 length is about two-fifths that of the entire shell ; its 

 breadth is about half the basal diameter ; there is no 

 particular sculpture ; the nacre is usually tinged with 

 pink or flesh-colour. The outer-lip is acute ; the pillar is 

 white, rather obliquely subrectilinear, yet a little incurved 

 posteriorly, and meets the whorl above it at nearly right 

 angles. The vertical height of a large specimen, whose 

 base measured all but fourteen lines, scarcely exceeded 

 two-thirds of an inch ; these proportions are, however, 

 extreme, as the general length is only one-third less than 

 the basal diameter. 



The beauty of the hues of the shell in this Trochus, 

 is exceeded by the painting of the animal, which rejoices 

 in a skin of most vivid colouring. The muzzle is dark 

 pinkish blue, speckled with opaque white towards its 

 extremity. The subulate tentacles are pale yellow, with 

 purple rings, darker above than below. The head-lobes 

 are very large, more or less crenated, of a rich orange, 

 sometimes approaching scarlet, with a border of bright 

 yellow. The eye-peduncles are large, and of an orange 

 colour ; the eyes are vivid blue. The neck-lappets are 

 orange, striped with flake white ; the inner one is crenated 

 at the edge. The lateral veils are of a sulphur yellow 

 hue, with white specks, and are minutely rugose, with 

 white dendritic papilla?. On each side are three pale 

 tawny or yellow filaments, ringed with white ; at their 

 bases are white tubercles. The sides of the foot are 

 closely and minutely speckled with purple, white and 

 yellow, paler at the edges. The disk of the foot is elongated 

 oval, rounded in front, of a yellowish-white hue, and has 



