BY C. HEDLEY. 425 



The flattened umbo is a good recognition-mark for this species, 

 Avhich occurred abundantly in 5-8 fathoms off the Hope Islands. 

 I took it also in 15 fathoms, off the Palm Islands. 



CUNA CAPILLACEA, n.sp. 



(Plate xxxvi., figs.9-10.) 



Shell small, solid, rather compressed, triangular-cordate. 

 Colour buiT-pink. Sculpture : from twelve to fourteen ribs pro- 

 ceed from the prodissoconch regularly to the ventral margin; 

 they are low and rounded, tending to split into a bundle of 

 riblets; their crests are surmounted by reverse imbricating 

 tubercles, which medially are de6cient or slightly developed, but 

 on the lateral ribs project as prominent scales. Intervening 

 furrows are wide and flat-bottomed. A concentric sculpture of 

 fine hairlines overruns the whole shell, but is best developed in 

 the furrows. Height 1*9; length 205; depth of single valve 

 075 mm. 



Numerous specimens, in 5 to 8 fathoms, o& the Hope Islands. 

 I previously dredged a few, in 17-20 fathoms, ofi" Mast Head 

 Island. 



This species closely resembles C. prcecalva in size and shape, 

 the colour and comparative smoothness of C. capillacea bein^^ the 

 most obvious features for separation. 



Another member of this family, Crassatellitldce, not yet 

 recorded from Queensland, is Hemidoiiax donaciforme Schroeter,* 

 which I have traced as far north as Port Curtis. 



Cardita semiorbiculata Linne. 



Chamasemiorbicidata'Linne, Syst. Nat. x. 1758, p.691; Hanley, 

 Ips. Linn. Conch. 1855, p. 87. Cardita phretiitica Lamarck, 



*Gardium donaciforme ^chvoeiex , Einl. Conch, iii. 1786, p. 68, pl.vii., f. 14; 

 G. donaceum Spengler, Skr. nat. Selsk., v.(l) 1799, p..37; id., Morch, Malak. 

 Blatt. xvi., 1870, p. 120. Hemkardium donaciforme Tryon, Am. Journ. 

 Con«h. vii. 1872, p. 271; Dall, Trans. Wagn. Free Inst. iii. 1900, p. 963. 

 Donax cardioides Pritchard & Gatliff, Proc. Koj. Soc. Vict. (2), xvi. 1903, 

 p. 119. 



45 



