BY C. HEDLEY. 705 



Hogg, Trans. Roy. Micr. Soc, xvi., PL xii., fig. 67 ; Id., von 

 Martens, Forsch. Gazelle, iii., 1889, p. 263. 



As Patella ambigua was already occupied by Gmelin in 1791, 

 it is of no consequence whether the Patella ambiyua of Chemnitz 

 or of Dillwyn meant a species of Scutus from New Zealand or 

 another Australian form. But the sketch of Montfort, inartistic 

 though it be, exactly represents that Scutiis with a narrow 

 shell, inhabiting Tasmania and New South Wales, as distin- 

 guished from ;6'. hreviculus of New Zealand, or S. astj'olabens 

 from West Australia. Therefore, aS'. antipodes of Montfort must 

 replace the younger name of anatinus now in ordinary use. 



The animal of this species lives beneath large stones in rock- 

 pools in clear water. Quoy & Gaimard mention that it was eaten 

 by the aboriginals of Jervis Bay. The attitude of an allied 

 species, so frequently copied in textbooks from the Zoology of 

 the Astrolabe, is that of a moribund or preserved individual. 

 An endeavour is here made to offer more life-like fisrures. 



Except the sole of the foot, Avhich is buff, the animal is 

 entirely coal-black. The mantle is very voluminous; two lateral 

 lobes, like those of Cyprsea, meet over the shell and quite conceal 

 it. Only when handled or sick, do the lobes part and disclose 

 the shell. The mantle also extends on each side behind the 

 shell for a space the breadth of the foot. In front, over the 

 head or each tentacle, an insinuation may temporarily appear. 

 At rest (Fig.8) the animal assumes the shape of an inverted 

 saucer, only the tips of the tentacles protruding beyond the cover 

 of the mantle. The head is elongate, with a long and cylindrical 

 muzzle usually expanded at the distal extremity. The tactile 

 tentacles are long and stout, with a very short ocular tentacle 

 at the outer base of each. From the base of each tentacle, alonsr 

 the epipodial line, runs a series of small, close-set, short lappets. 

 The young differ considerably from the adult. 'i'hey have a 

 comparatively narrower shell with the apex more excentric; of 

 a white colour, the mantle-lobes, instead of folding across the 

 shell, merely curl over its edge. In a specimen half an inch 

 long (Fig.9), the mantle was deeply notched above the head, 

 and its lobes failed to meet across the shell. It was uniform 



