216 



Notes 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.] 



Plate XXVI. 



In December, 1910, and January, 1911, I visited Wes- 

 tern Australia and collected shells from the shores at Esper- 

 anoe Bay, Hopetoun, and King George Sound oh 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 

 S.S. "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 verj^ large majority of them are 

 identical with or closely resemble our "Adelaidean fauna," 

 a/S 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, antea. 

 Dredged in 35 fathoms off Hopetoun, 1 moderately good 

 with an appendix ; in Geographe Bay 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. 



