48 



the continuation of the beads; it is strongly depressed, more convex above than below, with a 

 blunt angle, but no keel. The umbilicus is funnel-shaped, moderately wide, pervious, its walls 

 are smooth, with only a few growth-striae, it is bordered by a spiral ridge, which is indistinctly 

 beaded. Aperture rounded-triangular, the upper and basal margins regularly rounded, the upper 

 one being more curved. Columellar margin nearly straight, slightly expanded at its upper end 

 above the umbilicus, thickened below and forming a distinct angle with the basal margin, largely 

 due to the ending of the umbilical ridge. Interior of aperture strongly iridescent. Operculum thin, 

 corneous, with many whorls (about lo), outer surface hollow, with irregular, radiating striae, which 

 are more numerous and regular near the sutural line, inner surface convex, and very smooth. 



Alt. g^g, diam. maj. ii'^/„, apert. alt. 6, lat. 4^3 Mill. 



This species, by its smoothness, may be considered as an intermediate form between the 

 sculptured species without special colour and 5. zacalliLs Melv. and allies, it is still much more 

 conical and the umbilicus is much narrower (only 2 Mill.) than in those species. 



As an exception the state of preservation of the soft parts was insufficient, however I 

 was able to study the radula and maxillae. These last consist of triangular plates, with rounded 

 angles, dark brown towards the free margin, with a fibrous texture, which disappears towards 

 the posterior margin. 



The radula has about 26 rows of teeth and 7 median rows, with a large number of 

 uncini. The rhachidian tooth (R) has a subquadrate body with winged sides and a long triangular 

 cusp with convex sides, which are serrated, the body of the first lateral (i) is nearly quadrate, 

 with a broad triangular cusp, serrated on the distal and part of the proximal margin, the second 

 lateral (2) is oblong and serrated like the first one, the third (3) has a quadrangular body, with 

 a simple cusp, the fourth lateral is very large, its body irregular, its cusp long, serrated on 

 both sides, but this is only visible on the upper side in its normal position; the uncini (U), the 

 number of which I cannot ascertain, are long, slender, and apparently smooth, though in some 

 of them, a few very small denticles are present, but they are only visible in an expanded 

 position. The bodies of the median teeth are brown especially towards the centre. 



2. Solariella zacalloides n. sp. PL III, fig. 6. 



Stat. 204. Between islands of Wowoni and Buton. 75 — 94 M. Sand with dead shells. 1 1 Spec. 



Shell depressed, slightly conical, rather thin, upper surface yellowish-white, with ziczac-lines 

 and blotches of yellowish-brown, forming more or less distinct bands, of which one, consisting of 

 triangular white spots and very small blotches, borders the suture, a peripheral band distinctly 

 articulated with white and brown and an intermediate band of more arrow-headed blotches; the 

 interstices are filled by the yellowish-brown lines, which are often confluent, leaving only smiall 

 whitish spots ; basal surface lighter, with scarce markings, of which a band of blotches, bordering 

 the umbilicus, is the most conspicuous; whorls about 5; nucleus smooth, the next two whorls 

 with a few (3 or 4) lirae, which are slightly irregular, the upper one is beaded; the lirae become 

 less distinct, being broader and flatter on the next whorl, and are transferred in distant striae 

 with smooth interstices; the infrasutural beads, cease on the penultimate whorl; besides this 



4S 



