269 



One of the specimens is white-banded on last whorl, but else (|uitc t\pi(:al, I cannot 

 conceive how Tryon (1. c.) came to the conclusion that this species should have been described 

 after a "distorted shell". 



12. Mitra Sibogac n. sp. PI. XVIII, fio-. 10. 



Stat. 95. 5°43'.5 N., ii9°4o'E. Sulu-archipelago. 522 M. Stony bottom, i Spec. 

 Stat. 251. 5°28'.4S., 132° o'. 2 E. Arafura Sea. 204 M. Hard coralsand. 1 Spec. 



Shell elongately fusiform, with long spire, being on dorsal view as long as last whorl. 

 Nucleus partly wanting. Whorls 9, slightly convex, separated by a strongly marked, slightly 

 crenulated suture, which is nearly excavated. Colour uniformly brownish-yellow, .sculpture 

 consisting of flat lirae, separated by narrower grooves, which are coarsely punctured or pitted, 

 6 to 7 grooves on penultimate whorl, about 22 on last whorl, of which the basal ones are 

 but indistinctly punctured. Moreover the whole shell is covered with growth-striae and especially 

 on the upper whorls with radiating ribs, less conspicuous on lower whorls. Aperture narrow, 

 with rather sharp, slightly undulating margin, smooth interiorly, columellar margin with 4 

 distinct plicae. 



Alt. 20, lat. 6Y3; apert. alt. 9, lat. 2Y0 Mill. 



This description has been made after the specimen from Stat. 251, that from Stat. 95 

 is a younger, dead, rather broken shell, though it seems to be narrower; I think it will be the 

 same species. This new species seems to be allied to M. inqtiinata Reeve (Conch. Ic. fig. 29) 

 but is much smaller, with, according to figure, much coarser punctures, more convex whorls 

 and it differs also in colour. 



13. Mitra albocoronata n. sp. PI. XXII, fig. 6. 



Stat. fj. Borneo-bank. 59 M. Fine grey coralsand. i Spec. 



Stat. 162. Between Loslos and Broken-islands, West-coast of Salawatti. 18 M. Coarse and fine 

 sand, with clay and shells, i Spec. 



Shell fusiform, with moderately long spire, being on dorsal view, shorter than last 

 whorl. Nucleus wanting, remaining whorls 8, slightly convex, separated b}' a strongly marked 

 suture, which is slightly crenulate. Colour (in the fresh specimen) dark olive-brown with a 

 yellowish-white band at some distance below the suture and white spots at somewhat irregular 

 intervals, crossing the space between the band and suture (about 10 on last whorl); moreover 

 a few scattered white spots near the base of last whorl. Shell rather smooth, sculptured by 

 spiral rows of punctures in very shallow grooves, about 9 on penultimate whorl, (base conspi- 

 cuously grooved) and very fine growth-striae. Aperture rather narrow, with slightly crenulated 

 peristome, columellar margin with 4 strong plicae, which are white on a brown wall. Interior 

 of aperture bluish. 



Alt. 28, lat. 10 ; apert. alt. 13Y2, lat. ? Mill. 



Alt. 23, lat. 8Y3; apert. alt. 11, lat. 3Y3 Mill. 



Two specimens belong to this species ; the largest, broken at the aperture and bleached 



23 



