169 
hangs, and has 6 medium-sized tubercles, and is margined by 
a flat, axially incised, spiral lira, with a threadlet on either 
side. 
Colour light ashen-grey, with obscure flames of deeper grey 
or buff, and with numerous small pink dots on the second and 
third whorls. The umbilicus and its margin are pure white, 
the throat nacreous green. 
Height, 8 mm. : diameter of base, 9'75 mm. 
TIah. — Backstairs Passage, St. Vincent Gulf ; dredged 
alive in 20, 22, 23 fathoms, dead in 6 to 23 fathoms. 
Diar/nosis. — The type from Gray's collection of TrocJius 
cJangulus, Wood, in the Natural History Museum, London, 
differs from our species in having a more sinuous columella, 
due to a large tubercle at each end, and a median bulge, only 
6 lirae on the penultimate whorl, stouter and fewer lirae in the 
throat, a less rounded periphery, its colour light pink, with 
pink spots on the base, and articulated deep pink just above 
and below the suture, and green and red tints instead of light 
ashen-grey with darker buff flammules. 
Crassatellites ponderosus, Gmelin. 
This is the name suggested by Mr. Hedley, in P.R.S. of 
N.S.W., 1904, Part 1, page 198, for C. castanea, Reeve, as 
also for C. kinf/icola, Lamk. ; (J. donacina, Lamk. ; C decipiens, 
Reeve : C. errones, Reeve : C. pidchra, Reeve : and C cumingi, 
A. Adams, which E. A, Smith and Brazier had previously 
united under the name of G. kingicola, Lamk. Gmelin's 
shell, which was first defined in pre-Linnean times by Chem- 
nitz, is cited by von Martens in Malak. Blat. xix., 1872, page 
30, as from New Guinea. In Syst. Naturae, C. Linne, vi. 
Vermes, page 3280, it is given as Vefii/s pofiderosa, No. 54, as 
inhabiting the Southern Ocean. 
Some 40 specimens have been dredged by me in South 
Australian waters, of which 26 are single values. Living 
individuals were found at 20 fathoms, off Normanville, at 19 
fathoms off Eastern Cove, Kangaroo Island, and at 15 fa- 
thoms off Wallaroo. These form the material on which the 
following observations were based. 
All the species above-named, txcept C. eastern eo, are 
validly corrugated by sub-distant concentric ribs. Not one of 
my forty examples is so corrugated. It is, therefore, least like 
0. kingicola, Lamk. But I only possess one cabinet specimen 
of each of them. Perhaps a large series would show examples 
with smooth surfaces near the umbos. 
Size. — The largest measures 115 mm. antero-posteriorly, 
90 mm. umbo-ventrally. and 49 mm. in section, and weighs 
ten ounces. 
