G36 THE VOYAGE OF H.M.S. CHALLENGER 



up prominent on one side ; the last, viewed as the shell lies on its face, is two-thirds of 

 the whole length. Suture strongly marked, but not impressed, nor canaliculate nor 

 marginated. Mouth small, oblique, very much narrowed by the teeth of both lips. Outer 

 lip very much thickened, with a large prominent blunt tooth on the inner side above the 

 middle : there is a shallow sinus above at the junction of the lip with the body, and a 

 very small one at the point of the pillar. Inner lip : there is a thick toothed pad on the 

 body ; of the two pillar-teeth, the lower, though stronger, is slightly less prominent than 

 the upper. H. 0"11 in. B. 0'07. Mouth, height 0-064, breadth to outside of callus on 

 both lips, 0-058. 



This species is not unlike a small Ringicula auriculata, Menard de la Groye ; but the spire is 

 more depressed, the apex is slightly natter, and the extreme tip is hardly so small. 



4. Ringicula peracuta, Watson (PI. XLVII. fig. 11). 



Ringicula peracuta, Watson, Prelim. Report, pt. 18, Journ. Linn. Soc. Lond., vol. xvii. p. 292. 



Station 24. March 25, 1873. Lat. 18° 38' 30" N., long. 65° 5' 30" W. North of 

 Culebra Island, West Indies. 390 fathoms. Pteropod ooze. 



Station 56. May 29, 1873. Lat. 32° 8' 45" N., long. 64° 59' 35" W. Off Bermudas. 

 1075 fathoms. Coral mud. Bottom temperature 38 0- 2 F. 



Station 122. September 10, 1873. Lat. 9° 5' S., long. 34° 50' W. Off Pernambuco, 

 350 fathoms. Bed mud. 



Shell. — Ovate, with a somewhat high conical small-pointed spire, smooth and glossy, 

 spirally furrowed below the periphery, with a marginated suture and a largish mouth. 

 Sculpture : Longitudinals — the whole surface is pretty regularly scored with distinct, but 

 not sharp, shallow furrows on the lines of growth. Spirals — just below the suture is a 

 fine furrow fictitiously strengthened by the shining through of the superior whorl ; from 

 the periphery to the point of the base there are rather remote spiral furrows, which seem 

 to vary as usual in number and in distinctness. Colour glossy white, with a faint bluish 

 tinge. Spire rather high, conical, scarcely subscalar. Apex sharp ; for though the extreme 

 tip is a little tumid, it stands well up and is rounded. Whorls 5, conical, slightly convex ; 

 the last is a little tumid above, but a little way behind the outer lip it becomes contracted 

 and flattened. Suture distinct. Mouth rather large, not very oblique. Outer lip very 

 oblique to the axis of the shell, slightly thickened, toothed and prominent in the middle, 

 with large open sinus above, and a very slight one in front. Inner lip : there is a rather 

 slight callus with a small tooth about the middle ; the pillar-teeth, which are very far from 

 parallel, are nearly equal. H. 0'18 in. B. 0'1. Mouth, height 0*1, breadth 0*07. 



Ringicula grandinosa, Hinds, from the West African coast, is not unlike this species, but is 

 smaller ; the body-whorl in particular is much smaller, while the penultimate is larger ; it is without 



