204: 
NOTES ON SOUTH AUSTRALIAN MARINE MOLLUSCA 
WITH DESCRIPTIONS OF NEW SPECIES.—PART XIV. 
By Jos C. Verco, M.D. (Lond.), F.R.C.S, (Eng.). 
[Read October 12, 1911.] 
Piates XXVI1. anp XXVIT. 
Genus DENTALIUM. 
Since 1904, when I wrote a paper on Dentalium inter- 
calatum, Gould. (Trans. Roy. Soc., S.A., 1904, vol. xxviii., 
p- 1385), I have dredged in deeper waters, up to 300 fathoms, 
and have explored the coastline and dredged up to 35 fathoms. 
as far west as St. Francis Island in Nuyts Archipelago, and 
Point Sinclair; also at Esperance Bay, King George Sound, 
Ellensbrook, Yallingup, off Bunbury in Geographe Bay, and 
at Rottnest Island, and off Fremantle in Western Australia. 
As a great amount and a much varied kind of material 
has thus been accumulated I propose to review my previous 
Notes on Dentalium and other South Australian genera in 
the light of these collections. J 
Bossevain in ‘‘Scaphopoda of the Siboga Expedition, 1906,” 
p. 22, under Dentalium intercalatum, Gld., reproduces my 
paper from the Trans. Roy Soc. of 8.A. 
In the paper on VD. intercalatum, Gld., referred to I 
write: —“I have vainly endeavoured to discover more than 
one species among them. They are exceedingly variable, and 
were it not for intermediate forms quite a dozen species. 
might be created.’’ In going through the literature of 
Dentalium several species’ already created may from the 
description and figures be matched by my specimens, and so 
would seem to be but variations of the one abundant and 
protean species. Among these are the following :— 
Dentalium duodecimcostatum, Brazier. 
Dentalium duodecimecostatum, Brazier, Proc. Linn. Soc., 
N.S.W., vol. ii1., 1877, p. 56. Type locality—Darnley Island, 
Torres Straits, 30 fathoms, sandy mud (Chevert Hxped.); Pils- 
bry, Tryon, Man. Conch., 1897-8, vol. xvii., p. 13; Hedley, 
Records Austr. Mus., 1901, vol. iv., p. 128, pl. xvii., fig. 31; 
Bossevain, Scaphopoda of Siboga Exped., 1906, p. 15. 
Dredged in 22 fathoms in Gulf St. Vincent, 22 in good 
condition, some alive. ; 
The only difference between the unique type specimen 
and mine is that the latter attain the length of only 9 lines. 
instead of 11. 
