48 



RECORDS OF THE AUSTRALIAN MUSEUM. 



umbo. Length, 3 '5 mm.; height, 2 '-to mm.; depth of single valve, 

 1-5 mm. 



Only two left valves were obtained of this species, which be- 

 longs to the same section of the genus as C brazieri, Smith, from 

 wliich, as from other co-generic forms, the abrupt anterior end 

 distinijuishes it. 



BORNIA RADIATA, ^j). HOV. 



(Fig. 12). 



Shell thin, diaphanous, rather compressed, oblong, inequilateral, 

 the posterior side being twice the length of the anterior ; a slight 

 median sinus. Umbo prominent, prodissoconch conspicuous. 



Surface dull. 

 Colour pale 

 yellow, irre- 

 gularly zoned 

 with opaque 

 white. Sculp- 

 ture, of fine, 

 dense, radiat- 

 ing hair lint s, 

 which gi'ow 

 coarser on ap- 

 proaching the 

 valve margin, 

 with reticu- 

 Fi? 12. late fine and 



Bornia radiata. COarse con- 



con centric growth lines. Hereand there concentric sulci, indicating- 

 growth interruptions, break the continuity of the surface. Within 

 smooth and glossy; muscle scars hardly visible; external sculpture 

 appearing through the valve. Height, 4"6 mm.; length, 6 mm.; 

 depth of single valve, 1 "25 mm. 



Numerous odd valves were secui'ed. 



GASTEROPODA. 



ASTELE BILIX, sjy. noi\ 



(Fig. 1.3). 



Shell small, depressed-conical, a little broader than high ; spire 

 gradate. Nucleus lost, six whorls remain. Colour, base white; 

 upper surface lemon yellow, articulated on the periphery with 



