By W. L. 'MAT. 



3?3 



]\IARGIXELLA ALTILABRA, N.S.P. (PL. XIII., 

 FIG. 3). 



Shell pyriform, glossy, white, solid, with a slightly 

 -elevated spire; whorls four; aperture narrow, linear; outer 

 lip moderately thickened, mounting the spire about half 

 its height at the junction; it then rises almost to the level 

 of the spire, at the same time curving strongly to the front, 

 giving it a spout-like appearance, and after an outward 

 sweep it descends in a straight line to the square front; 

 within it is very finely and obscurely corrugated; 

 columella with four moderate obliquely ascending teeth, 

 the upper one being almost invisible from a front view. 



Length, 5 m.m.; breadth, 2.6 m..m. 



Localit}': Type 80 fathoms 10 miles east of Schouten 

 Island, with about 50 others; also numerous in 100 

 fathoms seven miles east of Cape Pillar, and in less 

 numbers in 40 fathoms off Schouten Island. This is a 

 close ally of M. stilla Hedley, ]\Iem. Aus. Mus., Pt. 6, 

 1903, p. 367, and is perhaps the variety he refers to there. 

 I have collected at least a hundred specimens, which are 

 constant in form ; it differs from stilla in its narrower form 

 anteriorly, the very high angle of the lip with its great 

 forward curve, the comparatively weak teeth, and the 

 absence cf the strong denticulations on the outer lip. 



MARGIXELLA GRACILIS, X.S.P. (PL. XIII., 

 FIG. 4.) 



Shell biconical, somewhat thin in texture, semi-trans- 

 parent, with an elevated spire; colour white with orange 

 bands ; whorls five, rounded ; aperture very narrow above, 

 rather wide centrally, and again narrow at the rounded 

 anterior end; outer lip convex, bearing within a distinct 

 tubercle at one-eighth from the posterior end, and fol- 

 lowed by very small irregular crenulations; columella 

 strongly excavate, with four well-developed plaits, at 

 lirst obliquely ascending, but becoming less so, the upper 

 one being almost at right angles with the pillar. There 

 is a colour band inmiediately above and below the suture; 

 two broad ones on the body whorl are almost confluent, 

 the upper one reaching above the aperture, and the lower 

 to the last plication; a very narrow band leaves the third 

 plication, and shows in the inner end of the mouth as a 

 .bright orange blotch. 



