BY C. HEDLEY. G93 



It has already been reported by Prof. Tate that M. angusta 

 and M. elongata are synonyms, an observation which, from ex- 

 amination of their respective types, [ can confirm. As the 

 notices in the Conchologica Iconica were published a year before 

 those in the Zoological Proceedings, it follows that avgusta must 

 be ci'edited to Reeve, and must also take precedence over 

 elongata. To the list of Tasmanian species wrongly credited to 

 Raine Island {antea, xxxviii., p. 268), A. elongata can now be 

 added. 



This species is common round Sydne}'. Its habit is to lie in 

 the sand in the wash of the sea. When the drag of the waves 

 uncovers it, there is a sparkle of yellow, a scramble, two or three 

 quick stabs of the foot, and the bivalve is again buried. The 

 foot protrudes to a length equal to that of the shell; it is flat, 

 cordate-acuminate, buff with a pink tinge. The exhalant siphon 

 seems to be always exserted further than its fellow; the orifice 

 is beset with a few, small, digitate papillse. The inhalant siphon 

 issues at the angle of the shell; as far as I could observe it in 

 captivity, it extends only a third of the length of the other 

 siphon, and has the expanded orifice fringed with fine, pinnatifid 

 processes. 



Mr. T. Dick sends me a specimen of A. angusta from Port 

 Macquarie, which he found in process of being bored by Polinices 

 incei. 



Amphidesma cuneata Lamarck. 



Crassatella cuneata Lamarck, An. s. vert., v., 1818, p. 483; Id., 

 Lamy, Bull. Mus. Hist. Nat., 1912, p.248, text-fig. (not of 

 Sowerby, Reeve, Hanley, or Tate). Amphides7na glabrella 

 Lamarck, op. cit., p. 493; Id., Lamy, op. cit , p. 253; Id., Lamy, 

 Journ. de Conch., Ixi., 1913, p.322; Id., Blainville, Man. de 

 Malac, 1827, PI. 78, fig.6; Id., Tate, Trans. Roy. Soc. S.A., xxi., 

 1897, p. 46. Mesodesma gaijmardi T)esha.yes, Encycl. Meth., vers, 

 ii., 1835, p.4:i4:(Jide Lamy). Mesodesma prcecisa Reeve, Conch. 

 Icon., vii., 1854, P1.4, fig. 31; Id., Deshayes, Proc. Zool. Soc, 1854 

 (May, 1855), p. 338. Mesodesma obtusa Crosse & Fischer, Journ. 

 de Conch., xii., 1864, p.350, and xiii., 1865, p.428, PI. xi., fig.4; 

 Id., Angas, Proc. Zool. Soc , 1867, p.920. 



