680 



STUDIES ON AUSTRALIAN MOLLUSCA. Part XIII. 



By C. Hedley, F.L.S. 



(Plates xlvi.-lii.) 

 (Continued from Vol. xxxix., p.765.) 



Akca adamsiana Dunker. 



Area adamsiana Dunker, Novit. Conch. 1866, p. 88, PI. xxix., 

 figs.4-6. Area siynata Dunker, op. ait., 1868, p. 112, PI. xxxviii., 

 figs. 3-5: Id., Laniy, Journ. de Conch , Iv., 1907, p. 78, Pl.i., figs. 

 1,2. 



This species has not hitherto been recorded for Australia I 

 dredged several specimens in ten fathoms in Port Curtis, Queens- 

 land. Submitting these to Dr. Lamy, lie approved of my iden- 

 tification of them as A. adamsiana, and added that they con- 

 firmed him in considering that species identical with A. signata. 

 For while the larger of my series corresponded well to A. signota, 



the smaller agreed exactly with A. adamsiana. 



» 



Akca botanica, sp.nov. 

 (PI. li., figs.33, 34, 35.) 



Barbatia pusilla Angas, Proc. Zool. Soc, 1867, p. 931, not 

 Byssoarca ]>usilla Sowerby. 



Shell small, very solid, pointed-oblong, inflated, flattened on 

 the anterior-superior face, angled where this face meets the disk, 

 constricted slightly abreast of the byssal gape, truncate pos- 

 teriorly and attenuate anteriorly. Colour dull white or uniform 

 clay-colour. Umbo at three-flfths of total length, enrolled, 

 closely approaching. Area narrow-lanceolate, sunk under the 

 high arched beaks. Sculpture: small, conical scales set in im- 

 bricating flounces, the scales in about forty-four radials, the con- 

 centric lines about forty. The radials on the anterior face of 



