470 MOLLUSCA OF MAST HEAD REEF, QUEENSLAND, I., 



I received from Mr. A. F. Hemsley a perfect specimen which 

 he obtained near Cooktown, Queensland. 



Glycymeris cardiiformis Angas. 



Pectunculus cardiiformis Angas, Proc. Zool. Soc. 1879, p. 41 9, 



pi. xxxv. fig. 6. 

 P. hoylei Melvill & Standen, Journ. Linn. Soc. Zool. xxvii. 1899, 

 p.187, pl.xi. fig.24. 



A handsome Glycymeris was dredged in all stages of growth. 

 The largest was alive and contained several pearls; it measured, 

 length 47mm., height 47mm., and depth of conjoined valves 35mm.; 

 the radials were thirty-three. With some hesitation it is referred 

 to the species named by Angas. The grooves are deep and 

 squarely cut, and the ribs more scabrous than his description 

 would imply, but he may have used a worn example. In shape 

 and general appearance the figure of P. robustus Sowerby,* 

 answers to our shell. 



The species of Angas has not been since recognised. It came 

 from the collection of Sylvanus Hanley. Macgillivray, who, 

 dredged from H.M.S. 'Rattlesnake' in the vicinity of the 

 Capricorns, supplied shells to Hanley. 



Philobrya scabra, n.sp. 



(Plate xxxvii., figs. 14-15.) 



Valve small, nearly square in outline, solid, considerably 

 inflated, very inequilateral. Colour various, chocolate, chrome- 

 yellow, pink or purple, usually a monochrome but sometimes with 

 an occasional dark spot. Epidermis not prominently developed, 

 presenting a lustrous surface. Sculpture: from beneath the pro- 

 toconch radiate about eighteen round ribs which strongly denti- 

 culate the margin and are divided by flat and broader interspaces. 

 These ribs are largest medially and continue in force to the 

 anterior margin, but on the posterior slope they rapidly degenerate 

 and disappear. Concentrically the furrows are latticed by about 



* Sowerby, Proc. Zool. Soc. 1883, p. 21, pl.vii. tig.4. 



