BY C. HEDLEY. 477 



were never published. But of that collection 673 species were 

 enumerated by Mr. J. Brazier.* The 'Challenger' Expedition 

 dredged 230 shells in Queensland waters, while the 'Alert' 

 obtained 181. 



(Addenda to Part i.) 



The chiton Acanthopleuy'a spi7iiger Sowerby, was abundant 

 amongst the oysters on the nigger-heads, but was omitted from 

 the preceding list. 



Ill the previous Part a conspicuous bivalve from Mast Head 

 was catalogued (p. 466) as Pitaria inflata Sowerby. As the 

 result of further study, I now consider that this is the species 

 pourtrayed on PL 152 of Martyn's 'Universal Conchologist.' 

 The "explanatory table" of that work cites two species of mussel 

 for this Plate 152, but these names evidently refer to the two 

 mussels of the preceding Plate 151. So far as Martyn is con- 

 cerned, our shell is therefore nameless. My determination was 

 based less on Sowerby's original accountf than on Reeve's figure, | 

 the locality, "Port Curtis," in the latter having weight. 



I referred a specimen to my friend, Dr. W. H. Dall, who with 

 his usual kindness gave me the benefit of his judgment and 

 knowledge, as follows : — " It is a Pitaria according to my 

 synopsis, and very close to P. albida Gmelin, from the West 

 Indies, but more globose and shorter. I do not find it in 

 Sowerby or Roemer, and I think it is not Sowerby's inflata. 

 Conrad's Cytherea jivora^ Journ. Acad. Nat. Sci. Philad. vii. 1837, 

 p. 253, pl.xix., fig. 18, agrees well, both figure and description. 

 He says it ' inhabits the Pacific, probably towards the coast of 

 New Holland.' We have no specimen of this. The shell Reeve 

 called prora from the Gulf of California is G. pollicaris Carpenter, 

 quite a ditFerent shell. It therefore seems likely that your shell 

 may be prora Conrad, but I cannot say positively, having no 

 specimens." 



* For illustrations and critical notes on this series, see Records Austr. 

 Mus. iv. 1901, pp. 121-130, pls.xvi.-xvii. 



t Sowerby, Thes. Conch, ii. 1853, p. 637, PI. cxxxiii., f. 127-8. 

 % Reeve, Conch. Icon. xiv. 1863, Dione, PI. ix., f.3. 



