268 THE VOYAGE OF H.M.S. CHALLENGER. 



narrow and oblique ; truncate in front. Outer lip not emarginate in front, though 

 truncate ; it ascends at the insertion, where is a wide shallow sinus ; its front is convex in 

 the middle ; it has a strong varix and a blunt round edge, which is scored with the blunt 

 very feeble teeth. Inner Up not at all thickened, nearly straight in direction, but oblique 

 to the axis ; nearly the whole lower half of its length is occupied by 4 broad, but not very 

 prominent oblique teeth, the foremost of which forms a very slight flange to the pillar 

 tip. H. 0-117 in. B. 0-075. Mouth, height 0-089, breadth 0-012. 



8. Marginella (Glabella) brachia, 1 n. sp. (PI. XVI. fig. 4). 



Station 185b. August 31, 1874. Lat. 11° 38' 15" S., long. 145° 59' 38" E. Off 

 Eaine Island, Cape York, North-East Australia. 155 fathoms. Coral sand. 



Shell. — Small, obovate, biconical, short-spired, strong, porcellanous white, lustrous, 

 with a very narrow mouth, an unemarginate varixed and feebly toothed outer lip, and 4 

 strongish folds on the pillar. Sculpture : Faint growth lines. Colour lustrous, por- 

 cellanous white. Spire short, dumpy, conical. Apex extremely blunt and rounded, 

 obscured by enamel. Whorls about 4, but they are very doubtfully distinguishable. 

 Suture quite buried in enamel. Mouth oblique, very narrow. Outer lip ascends almost 

 to the apex ; has a deep rounded sinus above, and a deep oblique canal in front, where it 

 is truncate but not emarginate ; the front edge, which is very thick and feebly scored by 

 the teeth, is almost level throughout, except of course just in front and behind ; it is 

 thickened outside by a strong broad varix. Inner lip thickened throughout, oblique and 

 almost quite direct ; of the 4 strong folds which occupy more than half its length, the 

 highest is nearly horizontal ; the others, which also increase in strength forwards, are very 

 oblique ; the last forms a flange round the point of the pillar, and is continuous with 

 the labral varix. H. O'll in. B. 0*07. Mouth, height 0'1, breadth 0-01. 



This species, compared to Marginella valida, has a much shorter spire, buried in enamel. 



9. Marginella (Glabella) alta, n. sp. (PI. XVI. fig. 2). 



Station 185b. August 31, 1874. Lat. 11° 38' 15" S., long. 143° 59' 38" E. Off 

 Eaine Island, Cape York, North-East Australia. 155 fathoms. Coral sand. 



Shell. — Small, with a rather high spire, biconically oval, thinnish, porcellanous white, 

 dullish, with a straightish but rather wide not emarginate mouth, weakly varixed 

 feebly toothed outer lip, and 4 folds on the pillar. Sculpture: there are very slight 



1 ^l a X^i short. 



