Oxb1G/0 
115 
Liron “Transactions of the Royal Society of South Australia,” 
vol. xxxiv., 1910.) ~ 
NOTES ON SOUTH AUSTRALIAN MARINE MOLLUSCA, 
WITH DESCRIPTIONS OF NEW SPECIES.—PART XIII. 
By Jos. C. Verco, M.D. (Lond.), F.R.C.S. (Eng.). 
{Read October 4, 1910.] 
Pirates XXIX. and XXX. 
This paper consists of full notes on the South Australian 
species of the genera Sezssurella, Schismope, Pyrene, and 
Turritella, and of occasional notes on species belonging to 
several other genera, 
I am indebted to Mr. Hedley, Mr. W. L. May, Mr. Gat- 
lift, and Mr. Gabriel for specimens given or loaned and sug- 
gestions made. ‘The usual difficulty was found in dealing with 
the mass of material in the genus Pyrene, owing to the varia- 
_tions,in each species. Pace, in his preliminary paper on the 
Columbellide (in Proc. Mal. Soc., London, 1902, vol. y., 
p- 39) regards the colour markings as of considerable value in 
distinguishing species, and JI set myself the task of studying 
these very closely; but I cannot say they proved of very great 
or very definite use, though of some assistance. My conclu- 
sions are not altogether in accord with those of other Aus- 
tralian workers, and are intended rather as suggestions for 
further advances. I found great difficulty, too, in dealing 
with the deep-sea 7'wrriteilas, especially the larger forms be- 
longing to the group of 7. runcinata and T. acctsa, Watson. 
He has several species from Australian waters which I cannot 
recognize with certainty, and my examples show so much varia~ 
tion in sculpture as to make splitting them up into species 
too dangerous, and to render their accurate description as 
varieties too difficult and laborious at present. 
Scissurella australis, Hedley. bette 
Scissurella australis, Hedley, Memoirs Austr. Mus., 1903, part 
6, vol. p. 329, fig. 63. Type locality—63 to 75 fathoms off 
Port Kembla, New South Wales. »” Gatliff and Gabriel, Proc. Roy. 
Soce., Victoria, 1910, vol. xxiii. (N.S.), part 1, p. 95, off Wilson’s 
Promontory.”’ 
Dredged in 130 fathoms off Cape Jaffa, 4 dead: in 150 
fathoms off Beachport, 1 good; in 200 fathoms, 1 good; in 
300 fathoms off Cape Jafia, 4 dead. Identified by Mr. Hedley 
from his type. 
Scissurella obliqua, Watson. >. © / 
Scissurella obliqua, Watson, ‘‘Chall.’”’ Reports, Zool., al xv: 
1886, p. 116, pl. viii., fig. 5. ‘Type locality— ‘““Rerguelen Tslan' 
32.5 
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