8 Mr. E. A. Smith on Mollusca from the 
young state this species is probably umbilicated. The basal 
keel is crossed by the incremental lines and has an irregular 
subnodose appearance. In addition to the lines of growth, 
indistinct spiral sulci are traceable upon the last two whorls, 
and one of the two specimens examined exhibits a slender 
elevated line revolving up the spire a little below the suture. 
The general form is like that of B. wola, Watson, which is 
a much less solid form than the present species, and has a 
different style of sculpture. 
I have associated with this remarkable species the name of 
the late Professor J. Wood-Mason, who has published several 
valuable reports upon portions of the ‘Investigator’ collections. 
Calliostoma subleve. (Pl. I. fig. 12.) 
Testa acute conica, imperforata, dilute flavo- vel roseo-fusca, infra 
pallida, nitida, iridescens, ad peripheriam acute carinata ; spira 
acute conica, lateribus levissime concavis; anfractus 8, apicales 
1-2 albi, subglobosi, ceteri plani, inferne ad suturam carinati, 
carina crenulata, spiraliter obsolete substriati, lira supra carinam 
cincti; anfr. tertius et quartus cancellati, ultimus infra planius- 
culus, obsolete tenuissime concentrice striatus, circa regionem 
umbilici liris tribus ornatus; umbilicus callo obtectus ; apertura 
obliqua, subquadrata, intus levis, iridescens ; columella brevis, 
obliqua, margaritacea. 
Diam. maj. 20 millim., min. 17, alt. 18. 
Hab. Station 172, off Trincomalee, Ceylon, in 200-350 
fathoms. 
The nucleus of the spire consists of two white convex 
whorls. The two following are obliquely costate, the coste 
being tuberculate above and below at the channelled suture, a 
third row of tubercles being round the middle; upon the 
next whorl the coste die away, but the tubercles still remain 
above and below, forming a carination at both sutures. The 
rest of the whorls are smooth, with very oblique and fine lines 
of growth and the faintest appearance of spiral striation. 
They are prominently keeled above the suture, the keel being 
crenulated or finely subtuberculated. Above and close to 
this carina‘a prominent lira revolves up the last three volutions. 
Upon the body-whorl the angle is bordered below with one or 
two less prominent lire. Of the three or four lire surrounding 
the umbilical region, the inner one bordering the central callus 
is somewhat tuberculated. 
Calliostoma tranquebaricum (Pfeiffer) appears to be the 
nearest ally of this species. It is, however, not so elevated 
or acutely conical, the base is flatter, the whorls are more 
