472 STUDIES ON AUSTRALIAN MOLLUSCA, X., 



Lissarca picta Hedley. 



Austrosarepta picta Hedley, these Proceedings, xxv. 1899, p. 430. 



Not finding any genus to suit this shell, I proposed a new one 

 for its reception. The figure of the type of Lissarca* is useless 

 for identification. But later I recognised my genus in an excel- 

 lent illustration of Lissarca by Martens & Pfeffer.f Prompted 

 by this, I suggested to Dr. Lamy, who was reviewing the genus, 

 the propriety of withdrawing Austrosarepta as a synonym of 

 Lissarca. He endorsed the idea, J as also did Dr. J. C. Verco.§ 

 Whereas Lissarca was originally introduced as a subgenus of Area, 

 I would now recommend its transference to the Limopsidse. The 

 genus, which is chiefly Antarctic, now contains L. miliaris 

 Philippi, 1845; L. rubrofusca Smith, 1879; L. rubricata Tate, 

 1886; L. vivipara Bernard, 1898; L. picta Hedley, 1899; L. 

 aucklandica Smith, 1902; L. rhomboidalis Verco, 1907; and L. 

 notorcadensis Melvill & Standen, 1907. 



L. picta and L. rubricata seem to represent each the other in 

 the Peronian and Adelaidean Regions respectively. 



Chlamys radiatus Hutton. 



Pecten radiatus Hutton, Cat. Marine Moll. New Zealand, 1873, 



p.82. 



(Plate x., fig.28.) 



This rare species has never been illustrated. Mr. E. R. Waite, 

 Curator of the Christchurch Museum, has kindly lent me for study 

 two imperfect specimens labelled by Prof. Hutton. The larger, 

 60 mm. high and 50 mm. long, is here figured. The species 

 proves to be a particularly flat Chlamys, something like G. serratus 

 Sowerby, but higher in proportion to length. The colour is buff 

 to flesh-pink. About 20 ribs exceed the rest in size; between the 

 primaries are intercalated three or four lesser riblets. All the 



*Phil. Trans. R. S. London, clxviiL Pl.ix. f. 17. 



t Jahrb. wiss. Anst. Hamburg, iii. 1886, Pl.iv. f. 14, a-e. 



X Journ. de Conch, lv. 1907, p.291. 



§ Trans. Roy! Soc. S.A. xxxi. 1907, p.221. 



