BY C. HEDLEY. 271 



manian. These are Cantharidus baudini, Clanculus ringens, Conus 

 pontificalis, Chloritis prunum, Area semitorta, Area trapezina, 

 Crenatula modiolaris, and Metis umbonella. 



A general idea of the size and shape of the type of C. planatella 

 is conveyed by Romer's figure of it — Monogr. Venus, 1869, PI. xix., 

 fig. 2 — but this is quite misleading as to sculpture. C. planatella 

 has broad, spaced, corrugated, concentric sculpture, exactly that of 

 C. cost at a Romer, op. cit., PI. xviii., fig. 3, a, b, c. Indeed so well 

 does it agree, that, when in the Swiss Museum, I confronted Lam- 

 arck's own shell with this illustration, I was satified that Romer 

 here represented the adult form of Lamarck's species. On revising 

 my notes in Australia, it appeared to me that the costata of Romer 

 differed from the costata of Chemnitz, which it was supposed to 

 represent. And as Dillwyn says, the "V. costata of Gmelin is an 

 extremely obscure species," Lamarck's name may yet find an 

 opportunity for legitimate service. 



Venerupis planicosta Deshayes. 



(Plate xvi., figs. 25, 26.) 



Venerupis planicosta Deshayes, Proc. Zool. Soc, 1853 (1854), p. 

 4; Id., Sowerby, Conch. Icon., xix., 1874, PI. iv., fig. 29. 



This figure is taken from a specimen in the Cuming Collection 

 marked type, and labelled "planicosta, Desh., P.Z.S., 1853, p. 4. 

 Hab. Swan River." Length, 18 ; height, 13 ; depth of single valve, 

 4 mm. 



Venerupis subdecussata Deshayes. 

 (Plate xvi., figs. 27, 28.) 



Venerupis subdecussata Deshayes, Cat. Conchif. Brit. Mus.,1853, 

 p.196; Id., Sowerby, Conch. Icon, xix., 1874, PL iv., f.2G. 



This species is represented in the British Museum by two 

 specimens, probably types, but not so marked. These are labelled 

 " Venerupis subdecussata, Deshayes. Van Diemen's Land, R. 

 Gunn, Esq." One of these, here figured, is in length, 23; height, 

 15; and depth of single valve, 6 mm. 



