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muzzle recorded for Phyinorhynch7is. So I am in the less agreeable position of describing several 

 new species, leaving to subsequent researches to decide if they are rightly classified. 



1. Pleurotoniella biconica n. sp. PI. XXIX, fig. 13. . 



Stat. 156. 0° 29'.2 S., I30°5'.3 E. Near Waigeu-island. 469 M. Coarse sand and broken shells. 

 [ Spec. 



Shell biconical, rather strong, white. Whorls 9, of which 4 form a yellowish-brown nucleus, 

 with moderately convex whorls, of which about 2 upper ones smooth, 2 with curved, raised 

 striae, stronger just below the suture, crossed in their lower part by very fine, oblique striae. 

 Subsequent whorls angular, the upper part slightly excavated, basal part nearly straight in 

 outline; this lower part has rather inconspicuous axial ribs, nearly disappearing in last whorl, 

 tubercled at the angle below the excavation ; otherwise the axial sculpture consists of rather 

 strong, nearly rib-like, much curved, raised striae in the excavation and very fine growth-lines \ 

 of spirals there are 4 on penultimate whorl, below and besides that accompanying the peri- 

 pheral angle, and numerous spirals on last whorl, with eventually intermediate ones; moreover 

 the shell is covered with excessively small granules, only visible under a strong lens. Last whorl 

 at first convex below angle, then moderately contracted. Aperture oblong, with a sharp angle 

 above and a compressed, gutter-like canal below; peristome broken, sinus, judging after growth- 

 lines, large but shallow, occupying the excavated space; columellar margin with a rather strong 

 layer of enamel, strongest at the short canal, where it forms an oblong umbilical pit. 



Ah. 10Y4, lat. 4^4; apert. alt. 5, lat. v\^ Mill. 



2. Pleurotoniella affinis n. sp. PL XXX, fig. i. 



Stat. 178. 2°4o'S., 128° 37'. 5 E. Ceram-sea. 835 M. Blue mud. i Spec. 



Shell biconical, thin, white. Whorls about 10, of which about 4 form a red-brown nucleus, 

 with convex whorls, of which about 1^/3 upper ones smooth, the other ones with angular riblets, 

 strongest near upper suture, crossed in their lower part by fi'ne, oblique striae. Subsequent whorls 

 with a broad, concave upper part and a much narrower lower part. The sculpture consists of 

 2 conspicuous spirals, just below the suture, less distinctly developed on last whorl, 5 much 

 fainter ones in the excavation ; this latter is bordered by a rather strong keel, which makes 

 the whorls angular; moreover a second keel at some distance, with 2 faint intermediate ones 

 on penultimate whorl ; the part below the excavation on last whorl is lirate over its whole surface. 

 The upper, excavated part of whorls is crossed by rather distant curved riblets, which, in crossing 

 the infrasutural lirae, produce small beads.. At last the whole shell is covered with fine growth- 

 striae and excessively fine granules. Last whorl convex, strongly attenuated towards its base. 

 Aperture obliquely oblong, sharply angular above, ending below in a short, compressed, gut- 

 ter-like canal ; peristome broken, probably with a wide, shallow sinus, columellar margin concave, 

 with a thin layer of enamel. 



Alt. 9, lat. 374; apert. alt. 3^4, lat. 1Y2 Mill. 



This species is no doubt nearly allied to the preceding one, but differs in shape, being 



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