

103 
common at 110, 130, and 200 fathoms. They appear to live 
at some greater depth, for the living example which formed 
the Challenger type was taken at 415 fathoms. Considerable 
variation from the type is seen. ts proportions are 1°67 
inches long and °8 broad, but these may be 1°45 and ‘6, giving 
a much more slender shell. Some individuals are more solid 
than others, and these usually have bolder sculpture, in axial 
coste and spiral lire. This is very noticeable in the whorls 
following the protoconch ; the first may be merely granulated, 
and the second show only obsolete radial and spiral sculpture. 
When there is any ornament it is seen as yellow-brown spiral 
bands between the raised lire, generally three in the spire- 
whorls and about six on the body-whorl, the last two or three 
tending to fuse. They are interrupted by the varices, which 
remain white. 
Family SIPHONARIID &. 
Genus SipHonarta, Sowerby, 1824. 
S. diemenensis, Quoy & Gaimard. 1, 
S. diemenensis, Quoy & Gaimard, Voy. de |’ Astrolabe, Zool., 
vol. ii., p. 827, pl. xxv., figs. 1-12, 1833; Reeve, Conch. Icon., vol. 
Ix., pl. 1.. fig. 1, 1856; Ten. Woods, Proc. Roy. Soc. Tasmania, 
1877, pp. 56 to 58; and 1878, p. 46; Adcock’s Handlist of Aquatic 
Moll. ne South Australia, 1893, No. 457; Tate & May, Proc. Linn. 
Soc. N.S. Wales, 1901, vol. xxvi., part 3, p. 418; Pritchard & Gat- 
liff, Proc. Roy. Soc. Vict., 1908, vol. xv. (u.s.), part 3, p. 220. 
S. denticulata, Quoy & Gaimard, op. cit., p. 340, pl. xxv., 
figs. 19, 20; Reeve, op cit., pl. i., fig. 4; Ten. Woods, op. cit., 
1877, p. 54, 56, and 1878, p. 47; Adcock, op. cit., No. 454. 
S. scabra, Reeve. Conch. Icon., vol. ix., pl. i., fig. 2. 
Type loc.—Of'S. diemenensis, D’Entrecasteaux Channel, 
Tasmania (Quoy) ; of 8. denticulata, “The southern part of 
New Holland at Western Port, and probably also at King 
George’s Sound” (Quoy) ; of 8. scabra, Port Jackson (Reeve). 
Obs.—Tate & May and Pritchard & Gatliff unite the 
first two as one species, and the latter authors unite all three. 
Our shell is very variable. It may be high and steeply 
conical, or so depressed as to have only a trace of cavity: 
rarely thin and delicate, generally of moderate thickness, 
Sometimes quite solid. The ribs may be as few as 17 or very 
numerous, distant, or crowded; high, narrow, and sharp-cut, 
or low, broad, and rude; straight, smooth, and regular, or 
crooked, rough, irregularly noded, or scabrous. Rarely they 
are quite colourless, when taken alive; or yellowish, with 
faint smokiness in the intercostal spaces. They are brown 
throughout, or with bluish-white ribs and bluish-black be- 
tween. But all these variations intergrade. It extends all 
along our coastline. 
ffAre 
or, 
