BY C. HEDLEY. 469 



chocolate. Interior ventral margin provided with about twenty- 

 six interlocking tubercles. Length 12*5 mm.; height 11mm.; 

 depth of single valve 4 mm. 



Nab. — Several separate and perhaps immature valves dredged 

 in 17-20 fathoms. 



Obs. — -The bold and even radial ribs sufficiently distinguish 

 this small species from its Australian congeners. Forbes has 

 noted that a new species of Pectunculus (possibly this one) was 

 dredged by the 'Rattlesnake' from 15-17 fathoms on a sandy 

 and shelly bottom off Cape Capricorn (Voy. ' Rattlesnake,' ii. 

 p.366). 



A single valve 27 mm. long and 23 mm. high was collected for 

 me by Mr. H. L. Kesteven on the beach at Caloundra, Queens- 

 land, in September, 1902. 



Glycymeris queenslandica, n sp. 

 (Plate xxxvi., figs. 3-4 ) 



Shell rather small, inequilateral, transversely ovate, moderately 

 inflated, anteriorly rounded, posteriorly subacuminate. Young 

 shells are rounder; the posterior angle appears in adolescence and 

 is most marked in aged individuals. Colour buff or pale purple, 

 clouded with white towards the apex. Sculpture inconspicuous, 

 consisting of minute radial riblets much broader than their inter- 

 stices and minutely beaded by concentric sculpture. When full 

 grown the riblets tend to aggregate into bundles of four or five 

 composing low ribs which correspond to the denticles on the 

 inner ventral margin. The epidermis appears as dense rows of 

 minute bristles set in the grooves between the riblets, and as 

 usual is thickest around the margin, leaving the umbo bald. 

 Teeth, about twenty-three set in a low arch. Except the posterior 

 dorsal margin, the inner edge of the valve is frilled by close, small r 

 interlocking tubercles. Length 25 mm.; height 22 mm.; depth 

 of single valve 7 mm. 



This speries was plentiful in the neighbourhood of Mast Head 

 Reef at a depth of 17-20 fathoms. 



