266 KEY. B. BOOG WATSON ON THE 



but, being eroded, the extreme tip is much effaced. Whorls 5, 

 very little rounded, and, though flattened, not at all constricted 

 below the suture. Suture oblique, scarcely at all impressed, but 

 very slightly channelled. Mouth very oblique from the front 

 backwards, but in its own direction very straight in the line of 

 the shell's axis ; oval, pointed above, and there slightly narrowed, 

 fully rounded below ; a considerable pad fills its upper corner ; it ia 

 over four fifths of the whole height of the shell. It is slightly con- 

 tracted above, and is not very open below ; and is altogether rather 

 small for the shell. Outer lip is a little flattened above ; but from 

 this forms a full round sweep. Inner lip slightly concave ; the 

 moderate pad which fills the upper corner of the mouth is divided 

 from the edge of the outer lip by an angular furrow, below which a 

 slight tubercular swelling runs out with a slight downward direc- 

 tion ; the pad spreads widely and thinly across the body, and covers 

 the umbilicus so as to leave of it only a mere chink ; below this it 

 narrows, but without any sudden contraction, to the somewhat 

 thickened pillar, which is bevelled off to a narrow rounded edge, 

 which is continued round on the base to meet the outer lip. 

 H. 0-57. B. 0-45. Penultimate whorl, height 0-15. Mouth, 

 height 0-41, breadth 0-3. 



This species belongs to the Amauropsis group ; but I know 

 none with which to compare it. It is much higher and narrower 

 than JV. impervia, Phil., from Magellan Straits. There is a 

 species of Natica from St. 169, N.E, from New Zealand, 700 fins., 

 which may perhaps be this species ; but it is in too bad condition 

 for identification. 



Oniscia, Soto.* 



Oniscta cithaea, n. sp. 



St. 192. Sept. 26, 1871. Lat. 5° 49' 15"S., long. 132° 14' 15' E. 

 Ke Islands, west of Papua. 140 fathoms. Mud. 



Shell. — Harp-shaped, being narrow below and broadish above ; 

 it has a somewhat raised and sharp-pointed apex, and is scored 

 by many mucronated ribs and broad low spirals. Sculpture. 

 Longitudinals — on the last whorl (but the shell is not quite 

 adult) are 17 rather low, flexuous, narrowish, rounded ribs which 

 are slightly crested on their front side ; they are a little concave 

 above, almost straight or very faintly convex for the most of their 



* I do not feel called on to disturb this well-known name in favour either 

 of Lambidium, Link, 1807, or of Momm, Bolten, 1798. 



