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216 
INOTES ON THE MARINE SHELLS OF WESTERN AUSTRALIA, 
WITH DESCRIPTIONS OF NEW SPECIES. 
PART I. 
By Jos. C. Verco, M.D. (Lond.), F.R.C.S. (Eng.). 
[Read October 12, 1911.] 
Pirate XXVI. 
In December, 1910, and January, 1911, I visited .Wes- 
tern Australia and collected shells from the shores at Esper- 
ance Bay, Hopetoun, and King George Sound on the south 
coast; and from Ellensbrook and Yallingup, south of Cape 
Naturaliste; from Bunbury, and the shores of Rottnest 
Island. I also dredged a little in Esperance Bay; had two 
casts with the bucket-dredge in 35 fathoms, a little west of 
Hopetoun, through the kindness of Captain Walden, of the 
8.8. ‘Ferret’; a good deal of dredging in 12 to 14 fathoms 
and 22 to 28 fathoms, and 35 fathoms in King George 
Sound; a good deal in Geographe Bay in 15 and in 22 
fathoms; and several casts off Fremantle, in 6 fathoms and 
in 15 fathoms from the Government tug-boat “Penguin,” 
through the kindness of Captain Winzor (the harbour master) 
and of Captain Airey (master of the “Penguin’’). 
I propose, therefore, as I take up the different genera 
and deal with my more extensive South Australian material 
to identify and record also all known Western Australian 
forms gathered by me, and describe any new species found. 
I may say that of more than 400 different species col- 
lected in the West the very large majority of them are 
identical with or closely resemble our ‘“Adelaidean fauna,’’ 
as Mr. Hedley has called it. 
Dentalium intercalatum, Gould. 
Dredged in 10 to 12 fathoms off Fremantle, 2 frag- 
ments, with valid narrow ribs and intercalated riblets, recall- 
ing the above species. 
Dentalium francisense, Verco, antec. 
Dredged in 35 fathoms off Hopetoun, 1 moderately Bed 
with an appendix; in Ghograplie Hoy. in 15 fathoms, 4 
moderate; in 22 fathoms, 2 good and 6 moderate; off Fre- 
mantle in 6 fathoms, 1 good; and in 10 to 12 fathoms, 1 
poor. Taken on Bunbury Beach, 4 rolled; and on Rottnest 
Island, 2 rolled. 
