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infraperipheral cord. Base convex, with 5 spiral lirae; the whole shell is covered with microscopic, 

 oblong punctures. Aperture nearly circular, the outer and basal margin regularly curved, thin, 

 slightly thickened interiorly. Columella nearly straight, with an inconspicuous tubercle about half- 

 way, near the base with a rounded angle. Inside of aperture nacreous. 



Alt. 4Y0, diam. maj. f/^ apert. alt. 2, lat. i 3 / 4 Mill. 



It is with much doubt, and chiefly on the authority of Mr. E. A. Smith, who writes that 

 he is also uncertain on this point, that I have located this species in the genus Priotroc/ms, 

 the shape of the columella calls in mind some species of Thalotia and Monodonta. Only fresh 

 specimens can clear up its true position. 



Minolia Adams. 



1. Alinolia ornatissima n. sp. PI. III, figs 4, \a\ PI. IX, fig. 6. 



Stat. 1 Si. Amboina. 54 M. Sand. 1 Spec. 



Stat. 193. Sanana-bay, E. coast of Sula-Resi. Reef. 1 Spec. 



Stat. 213. Saleyer. 9 — 36 M. 1 Spec. 



Stat. 260. 2,3 Miles N. 6f W. from North point of Nusa Jaan, Kei-islands. 90 M. Sand. 2 Spec. 



Stat. 261. Elat, West coast of Great Kei-island. 27 M. Mud. 1 Spec. 



Shell depressed, with low conoidal spire, broadly umbilicate, thick, greenish-yellow, top- 

 whorls and a band round the umbilicus brown, lower whorls with a row of large brown blotches 

 at the suture, last whorl at the periphery with a zone, articulated by oblong brown squares, 

 alternating with yellow spaces, upper and lower surface more or less distinctly variegated with 

 brown flames and spiral dots of the same colour. Whorls 5 1 /;,, separated by an impressed suture, 

 rather convex and slightly angular by the projection of one of the numerous lirae, these number 

 about 6 on the penultimate whorl, and 7 on the upper part of the last whorl, besides several 

 intermediate, elevated striae, which become very numerous towards the aperture; last whorl 

 angular at the periphery, its convex base with numerous, crowded, elevated striae (partly wanting 

 in a few specimens) ; the whole surface of the shell is covered with radial striae, crossing the 

 lirae and giving them a beaded appearance, especially near the suture and the umbilicus, where 

 they form regular folds. Umbilicus pervious, funnel-shaped, its wall with flat spiral lirae, crossed 

 by much more crowded, radial, elevated striae, separated by a conspicuous angle from the basal 

 surface. Aperture subquadrate, its upper margin slightly curved, but less so than the basal one, 

 columellar margin nearly straight, joining the basal margin with an angle, at the end of the 

 umbilical angle, slightly crenulated by the umbilical lirae; the margins are connected by a thin 

 nacreous layer; interior of the aperture nacreous, smooth, slightly thickened near the margins. 



Diam. maj. 6, alt. 5, apert. alt. 2 1 /.,, lat. 2, diam. of umbilicus 2 1 /,. Mill. 



Operculum of a not quite adult specimen very thin, yellowish, concave exteriorly, with 

 many whorls, each whorl spirally striate near its proximal margin, then follows a zone sculptured 

 only by the growth-striae, the distal margin lias conspicuous radiant striae, giving to that margin 

 a fringed appearance. The species varies in painting, some specimens, though fresh, being much 

 less marked with brown, the markings wanting nearly entirely in the specimen from Stat. 261, 



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