BY JOHN BRAZIER. 431 



(Diloma) constellata, Souverbie, but of a much darker colour 

 than the types from New Caledonia. 



3, Plecotrema concinna, H. and A. Adams. 



Plecotrema concinna^ H. and A. Adams, Proc. Zool. Soc. London, 

 p. 122, No. 9, 1853; Genera of Recent Mollusca, Vol. ii. 

 p, 241 ; PfeifFer in Malakozoologische Blatter, p. 150, No. 97, 

 1854; Monographia Auriculacearum Viventium, p. 101, No. 

 2, 1856 ; Catalogue of Auriculidse in the British Museum, 

 p. 76, No. 2, 1857; Paetel, Catalog der Conchylien Samm- 

 lung, p. 114, 1873; PfeifFer, Monographia Pneumonopomorum 

 and Auriculaceorum, p. 343, No. 2, 1876. 



Hah. ? (Mus. Cuming, 1853); Australia (Pfeiffer, 1854); 



Moreton Bay, Australia (Pfeiffer and British Museum^ 1856-57) ; 

 Moreton Island, near the Pilot Station, and Stradbroke Island, 

 Moreton Bay, Queensland, March and December, 1862 ; Tam- 

 bourine Bay, Lane Cove River, May 24, 1865 ; Double Bay, east 

 side, Feb. 8, 1879 ; Bantry and Hunter's Bays, Middle Harbour, 

 Port Jackson, June 20, Sept. 26, 1886 (Brazier). 



Specimens of this species collected by me in Queensland in 

 1662 were sent to Mr. Henry Adams in 1869 and duly named 

 Plecotrema concinna, H. and A. Ad. The four specimens collected 

 at Tambourine Bay, Lane Cove River, in May, 1865, were sent 

 to Mr. Angas in 1866; it appears he lost them and never recorded 

 the species in his Lists of the Marine Mollusca of Port Jackson. 



In 1879 with Mrs. Brazier I collected 34 specimens at Double 

 Bay, below the residence of the late Hon. S. D. Gordon ; six were 

 sent to the British Museum and compared with the types and 

 named by Mr. E. A. Smith Plecotrema concinna, H. and A. Ad. 



There is another species of Plecotrema named bicolor, Pfr., said 

 to have been found in Port Jackson by the late Mr. F. Strange 

 on the authority of Cuming. 



4. Laimodonta conica. Pease. 



Laimodonta conica. Pease, Proc. Zool. Soc. p. 242, 1862, American 

 Journal of Conchology, Vol. iv. p. 101, pi. xii. fig. 15, 1868. 



