14. 
South Australian Shells. 
S.A. NAT., VOL. XVI. 
April 10th, 1935. 
Calhostoma in the restricted sense is not found in South 
Australian seas. Our shells are located in the following sub- 
genera: — 
Fautor 1 redale 1924 (subgenus). Iredale proposed this 
as a full genus for the small Austral species of Calliostoma, nam- 
ing Z. comptus A. Adams from New Caledonia, as type, stating 
on the authority of Lt.-Col. Peile, that the radulae of the Austral 
species in the Gwatkin Collection, now in the British Museum, 
show notable differences from those of the Northern forms, the 
true Calliostoma , and also, as in the Palaeartic, the small forms 
are separable from the large similarly named species. An ex- 
amination of the radulae in the S.A. Museum collection reveals 
but slight differences from true Calliostoma. Fautor is definitely 
of no more than subgeneric rank. Here are included the south- 
ern Australian: allporti Tenison- Woods, columnarium Hedley & 
May, hedleyi Pritchard & Gatliff, legrcmdi Tenison- Woods, ve- 
larium Hedley & May, zietzi Verco. 
Spicator (subgenus noy.). Shell small, broadly conical, 
imperforate; sculpture of spiral lirae crossed by stout, slightly 
obtuse, oblique ridges; interstitial pits deep, rhombic, smooth; 
points of intersection of spirals and axials produced into sp ini- 
form granules; body whorl with a peripheral and subperipheral 
lira, the two together forming a truncated, sulcated keel. Type — 
C. spinulosum Tate from Moonta Bay, S.A. The type species 
is easily distinguished by its size and peculiar prickly sculpture. 
It does, however, recall the C. rubropunctatum Adams from 
North Australia, and that species may belong to Spicator. 
Salsipotens Iredale 1924 (subgenus). The remarks by 
Iredale concerning Fautor , were made to apply equally to this 
group except that Salsipotens is set up for the larger species. 
Type — Trochus armillatus Wood: = T. meyeri Philippi. As in 
the case of Fautor , we deem this but of subgeneric rank and not 
a full genus as Iredale intended. Here, as well as the type which 
is South Australian, we include our species rubiginosum Valen- 
ciennes = nobile Philippi, splendidum Philippi, ciliare Menke 
and australe Broderip. 
Sinutor (subgenus nov.). Sinistral, conical, imperforate, 
with spiral linear sculpture and somewhat convex base. Type — 
Zizyphinus incertus Reeve, of southern Australia and Tasmania. 
I his subgenus is, as far as we can at present determine, monc- 
typic. The characteristics are the sinistral form and the some- 
what convex base which is obtusely angled. 
