BY C. HEDLEY. 471 



Since writing the above I have received from Mr. F. H. Baker 

 specimens coloured uniform brown, which he collected at Port 

 Albert, Victoria. 



The shape of this eccentric Eulima is like that of Rissoa. 



Mangelia hilum, n.sp. 

 (Plate ix., fig. 17.) 



Shell minute, acicular, thin. Colour amber-brown, passing to 

 purple on the apex. Whorls five, wound obliquely, the first 

 minute, the last two-thirds of the whole shell. Sculpture : fine 

 spiral grooves which become more crowded anteriorly. Aperture 

 long and narrow, suddenly contracted anteriorly, sinus deeply 

 excavate, a thin sheet of callus spread on the columella, canal 

 broad, short, a little recurved. Length, 3'85; breadth, 125 mm. 



Off Vaucluse, Sydney Harbour (J. Brazier; one specimen from 

 12 fathoms). To be presented to the Australian Museum. 



Since writing the above, the species has occurred in a collection 

 dredged by Mr. W. L. May and myself, in 100 fathoms, seven 

 miles east of Cape Pillar, Tasmania. 



Arca trapezia Deshayes. 



Dr. H. A. Pilsbry informs me that the American localities 

 assigned to Arca trapezia and its synonyms are wrong. He writes, 

 " Semblas is evidently San Bias on the west coast of Mexico; but 

 no such shell is known from that region, and we have nothing in 

 American waters which could be reasonably identified with 

 trapezia." Dr. Lamy, who has recently reviewed the genus, con- 

 cludes* that the Australian shell is A. trapezia. Since the 

 evidence of locality, on which I relied, proves erroneous, I now 

 accept the name trapezia for the species discussed (ante., Vol.xxix. 

 p. 203) as Arca lischkei. 



The old name for Darling Harbour, N.S.W., was Cockle Creek, 

 in reference to the A. trapezia fouud there in abundance by the 

 early pioneers. The locality of Akaroa, New Zealand, given by 

 Dr. Lamy (p. 248) for this species, is certainly an error. 



* Journ. de Conch, liii. 1906,,p.333, footnote, and lv. 1907, p. 246. 



