90 BEV. B. BOOG WATSON ON THE 



This species closely resembles S. tetraschistum, W. ; but, be- 

 sides the obvious difference in size, that species is a little more 

 cylindrical and is much more strongly and uniformly sculptured. 

 I say nothing of the peculiar feature of the apex of that species, 

 because, the point being broken in the solitary specimen of the 

 present species, comparison is impossible. 



Tboohus, Z. 



17. T. (Gibbula) leaensis, n. sp. 20. T. (S.) lamprus, n. sp. 



18. T. (Ziziphinus) arruensis, n.sp. 21. T. (S.) albugo, n. sp. 



19. T. {Solariella) philippensis, 



n. sp. 



17. Tbochus (Gtbbula) leaensis, n. sp. 



Oct.-Dec. 1873. Lea Point, Cape Town. 



Shell. — Small, conoidal, scalar, having a rounded periphery, a 

 flattened base, no umbilicus, and with purple spiral threads on a 

 dull whity ground. Sculpture, The whole surface is longitudi- 

 nally obliquely striate, in hair-like puckerings 5 of spirals there 

 are on the last whorl above the corner of the mouth 7 purple 

 threads ; they are pretty equal, and are parted by furrows as wide 

 as themselves ; the third and fourth are somewhat stronger than 

 the others, and the three last, at the periphery, are closer than 

 the others. In some of the upper furrows traces of other fine 

 spirals can be seen. "Within the base lies one purple thread, 

 and inside of this there are nine feebler, flatter, more crowded 

 spirals, surrounding the closed, umbilical depression. Colour. A 

 ruddyish white, with dark purple spirals above; those on the 

 base, with the exception of the exterior one, being uncoloured ; 

 the apex is yellow. Spire conoidal, with a slightly raised rounded 

 apex. Whorls 6, small, the last tumid, the earlier ones rounded, 

 a little flattened below the suture; the embryonic whorls two, 

 minute, smooth, rather immersed. Suture linear, but strongly 

 marked by the angulation of the whorls. Mouth round, but 

 pointed above, and with an angulation at either end of the pillar. 

 Outer lip thin, sharp, and coloured by the purple spirals. Inner 

 lip sharp, on the edge of the pillar, round which it is reflected 

 and flattened, extending on the umbilicus in a small, thin, de- 

 fined pad. There is a slight obtuse tooth near the front of the 

 pillar. Inside dull, with a bright nacreous border within the dull 

 extreme edge. Umbilicus closed, but with a marked depression. 

 H. 0-2. B. 0-22, least 0175. Penultimate whorl 0-065. 

 Mouth, height 0'125, breadth 0-11. 



