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



broad above and projecting below. Spirals — there are many (on penultimate whorl about 

 20) irregular, unequal and unequally-parted scratches, three or four of which are markedly 

 larger than the rest. Raised between these lie minute hair-like lines, with here and there 

 a flat thread, which, in crossing the ribs, rise, at the top and especially near the bottom 

 of the whorls, into rounded tubercles. On the last whorl there are four rows of these 

 tubercles — one just below the suture, where they are broad and flat ; the second small 

 and indefinite ; the third at the periphery, where, transversely long, the tubercles are 

 sharp and small ; the fourth row is within the base, and there they are very small. The 

 pillar is feebly scored with many remote very small threads. The surface is otherwise 

 smooth and rather glossy. Colour dead white, with minute longitudinal lines and spots 

 of faint ruddy brown, with suffused stains of fainter brown ; on the penultimate whorl 

 there are five, on the last ten very fine spiral lines of the same colour. Spire sharply but 

 slightly convexly and a very little gibbously conical. Apex sharp. Whorls about 14, of 

 regular increase, flat ; the last is contracted and drawn out and slightly bent from the axis 

 of the shell, while the base is a little pinched in. Suture very faint. Mouth oval, but 

 pointed at the canal and at the upper corner, where it is narrowed by a slight contraction 

 of the lip and by the basal tooth ; porcellanous and glossy within. Outer Up ascends 

 markedly on the body- whorl, sinuated, contracted, and a little turned in above, expanded, 

 patulous, and wing-shaped in the middle, flat and slightly turned in on the base. It is 

 on the edge rounded, thin, irregularly channelled, with an external, narrow, projecting 

 varix. The canal is longish, narrow, and very much cut off obliquely backwards. Pillar 

 is short and narrow though strong, but rises from an elongated base ; it bends to the left, 

 and has a long fine edge on the margin of the canal. Inner lip : above and at the basal 

 tooth it is thick and abrupt on the edge, but below this thin though defined ; it is some- 

 what thicker along the canal. H. 1 in. B. 0*36, least - 29. Penultimate whorl, 

 height 0-17. Mouth, height 0-28, breadth 0-19. 



By an error of the press this was published in the Preliminary Report as a Bittium ; but it is 

 an unmistakable Cerithium. 



11. Cerithium {Lampania) australe, Quoy and Gaimard. 



Cerithium australe, Quoy and Gaimard, "Astrolabe," Zool. vol. iii. p. 131, pi. lv. fig. 7. 



„ „ Kiener, Iconog., p. 60, sp. 12, pL viii. fig. 2. 



„ „ Sowerby, Thes. Conch., vol. ii. pt. 16, p. 884, sp. 156, pi. clxxxv. fig. 266. 



Lampania australis, Angas, Port Jackson Moll., Proc. Zool. Soc. Lond., 1867, p. 208, No. 135. 



April 17-18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 



Habitat. — Port Jackson (Angas) ; Van Diemen's Land and China (British Museum). 



