BY C. HEDLEY. 



101 



minute grains. Scales of girdle radiately furrowed, somewhat 

 apart, large and small intermingled, with a series of very small 

 next the valves and along the margin. Gills extending along 

 :five-sixths of the foot. Length 38, breadth 22 mm. 



Hab. — The Isle of Pines, New Caledonia. 



Type. — To be placed in the Australian Museum. 



I found this species in abundance between half and high tide 

 marks in a rock pool, about half a mile distant from the Com- 

 mandant's House at the Isle of Pines, New Caledonia, in October, 

 1897. This island was so called by Captain Cook from its forest 

 of Araucaria cookii, which then, as now, gives so quaint a charm 

 to the landscape, and from which I have derived a specific name. 



Clinging to the rocks beside it was A canthopleura spiniger, and 

 the Littoriiia, Nerita and Ricinula characteristic of the rocky 

 shore of the Pacific tropics kept them company. 



The arrangement of large and small scales together on the 

 girdle separate this Iscknochiton from all but /. cariosus, Carpenter, 

 a native of South Australia and Victoria. From that the novelty 

 differs greatly by broader and flatter valves and by an entirely 

 difierent scheme both of colour and of sculpture. Technically 

 the shell under consideration should form a 

 second species of Carpenter's subgenus Hetero- 

 zorta, based on the uneven girdle scales, but 

 the general aspect of it suggests that such 

 a union would be strained by the remaining 

 features. 



Teinostoma oppletum, n.sp. 



(Figs. 7-9.) 



Shell discoidal, thick, opaque, inner whorls 

 sunk, each whorl margined by a heavy sutural 

 band of callus, which projects at the aperture. 

 Colour white, surface glossy. Sculpture; — 

 indistinct malleations and obscure revolving 

 grooves. Whorls 3^, the spire sunk, last whorl subangled around 

 the base, broadening and descending rapidly to the aperture. 



