598 



EET. B. BOOG WATSON ON THE 



Ape:v flattened, with the minute, smooth, 1| embryonic whorl 

 somewhat tumidly projecting. Whorls 8|, of slow and regular in- 

 crease. In the earlier whorls there is a slight tumidity below the 

 suture, a slight contraction in the middle, and a slight swelling 

 round the base of each whorl. This last feature is feebly persis- 

 tent in the later whorls, but otherwise these are flat. There is 

 a sharp carinated angle, and the base is almost flat, with an 

 angular tubercled umbilical edge. Suture linear, almost invisible. 

 Mouth perpendicular, somewhat rectangular, and broader than 

 high. Outer lip sharp and thin, not patulous, not descending, 

 with a rather deep but broad and open sinus at the suture, 

 forming a slightly acute angle at the periphery, where it ad- 

 vances very markedly, retreating immediately to form a sinus 

 on the base, where it is barely arched. Pillar-lip, which is 

 somewhat thickened, advances very little at its junction with 

 the body, then retreats slightly so as to form a small sinus, 

 bending at the same time a very little over the umbilicus. It 

 has a sort of double point with a slight nick between them. It 

 is very slightly reverted, and the umbilical groove behind it is 

 very small. Umbilicus small, funnel-shaped, oblique-edged, 

 crenate on the margin, and strongly scored within, and with 

 an oblique spiral formed by the old points of the false pillar- 

 end. Height 0-25. Breadth 0*24, least 0*22. Penultimate 

 whorl 0-08. Mouth, height 09, breadth O'l. 

 The variety from Pernambuco is characterized by the remark- 

 able distinctness of its sculpture, whence its name. This species 

 is a broader and much more ornamented form than JB. simplex or 

 B. munda. 

 5. Basilissa superb a, W. (superhus.) 



St. 184. E. of Cape York, Australia. Lat. 12° 8' S., long. 



145° 10' E. 1400 fms. Grey ooze. 1 specimen. 



Shell. — High, concavely conical, flat-based, sharply angulated ; 

 thin, finely reticulated, cream-coloured. Nacre very faint. 

 Sculpture. Spirals, there are about twenty delicate threads, very 

 nearly but not quite regular in thickness or distance, on tlie 

 upper part of the last whorl ; they slowly decrease in number 

 on the previous whorls. The two (or three) which form the 

 carina are thrown out a little on a projecting whitish fillet, 

 which encircles the base of the whorls. This whitish fillet ex- 

 tends to the base, where it forms a narrow obliquely- corrugated 

 edging. On the base there are about thirty spirals, more 

 crowded, flattened, and irregular than above, and the edge of 



