MARINE MOLLUSCA. 607 
body-whorl is quite smooth excepting towards the labrum where a few sulci parallel with it are 
sometimes visible and four or five rather coarse grooves encircle the base. The outer lip is sharp 
at the edge with four or five denticles anteriorly thickened and lirate within. lLirae twelve in 
number, produced within the aperture, thread-like, not reaching to the edge of the lip. Columella 
transversely lirate, furnished with a free-edged callosity. The operculum is yellowish, unguiform, 
with a terminal nucleus, and serrated on each side towards the apex. 
102. Nassa mulukuensis, n. sp. (Pl. XXXYV. figs. 9, 10). VI. 
Testa WV. maldivensi similis, sed gracilior, anfractibus superioribus spiraliter liratis, operculo 
diverso instructa. 
Longit. 24 mm., diam. 12. Apertura 12} longa, 6 lata. 
Shell elongate-ovate, turreted, whitish, with a few dots and spots of a reddish colour on the 
upper edge of the whorls, especially on the dorsal margin of the body-whorl. Whorls 9, the three 
apical smooth, glassy, the four following obliquely costate and transversely sulcate, the grooves 
causing the costae to be somewhat nodulous. The last two whorls are smooth, excepting the 
subsutural row of nodules and a few sulci parallel with the labrum and around the lower part 
of the body-whorl. The labrum, lirae within and the columellar callosity are as in WV. maldivensis. 
The operculum, however, is quite different from that of the species referred to, being ovate, 
concentric, with a central nucleus, and having only a few serrations on one (the outer) side. 
103. INassa subtranslucida, n. sp. (Pl. XX XV. fig. 11). V. 
Testa elongata, turrita, subpellucida, nitens, albida, maculis et lineis dilute fuscis irregulariter 
picta; anfractus 7, superiores tres laeves, convexiusculi, circa medium carinati, caeteri gradati, 
convexiusculi, longitudinaliter costati, costis laevibus, crassiusculis, quam interstitiis latioribus, in 
interstitiis trasversim striati, ultimus circa basim fortiter sulcatus et nodose liratus, cauda alba 
oblique suleata instructus; apertura intus alba, longit. totius } haud aequans; labrum extra valde 
incrassatum, album, maculis duabus fuscis ornatum, intus tenuiter liratum; columella arcuata, callo 
tenui, antice denticulum formante, induta. 
Longit. 8mm., diam. 4. 
This is a shining semipellucid species, rather strongly costate for its size. The last three or 
four ribs behind the labrum are obsolete inferiorly, and all are subnodose below the suture, through 
being crossed by a shallow groove. The colour-markings are irregularly disposed, but the principal 
spots are upon the upper extremities of some of the costae and at the middle and base of the 
body-whorl. 
104. Nassa disparilis, n. sp. (Pl. XXXYV. fig. 12). V. 
Testa minima, ovata, alba, lineis rufis duabus circa anfract. ultimum cincta; anfractus 7—8, 
superiores tres convexiusculi, laeves, politi, cirea medium carina filiformi instructi, caeteri longi- 
tudinaliter oblique costati (costis in anfr. penult. et antepenult. crassis, circiter 8, in ultimo 
gracilioribus, circiter 16, supra nodosis) inter costas spiraliter distincte suleati; apertura parva, longit. 
totius 2 adaequans; labrum extra varice albo crasso transversim striato instructum, intus liris 9, 
haud ad marginem productis, munitum; columella callo circumscripto induta, arcuata, transversim 
tuberculata. 
Longit. 7} mm., diam. 4. 
Only a single example is in the collection. It is remarkable for the stoutness and small number 
of the costae upon the penultimate and antepenultimate whorls in comparison with those upon the 
last. The upper extremities are cut across by a distinct groove, thus forming a row of nodules 
78—2 
