494 Transactions. 



Genus Macrocallista Meek, 1876. 



Macrocallista multistriata (Sowerby, 1851). 

 Genus Antigona Schumacher, 1817. 

 Subgenus Clausina Brown, 1827. 

 Section Ventricola Romer. 



Antigona creba (Hutton, 1873 . 



z landica (Gray, 1835" 1 . 



— subsulcata (Suter, 1905). 

 Genus Chione Megerle, 1811. 

 Subgenus Chione s. str. 



Chione stutchburyi Wood, 1828. 

 Subgenus Clausinella Gray. 



Section Chamelea Morch, 1853. 

 Chione spissa (Deshayes, 1835). 



mesodesma (Quoy and Gaimard, 1835). 

 Genus Salacia Jukes-Browne, 1914. 

 Salacia disjecta (Perry, 1811). 



yatei (Gray, 1835). 



Genus Gomphina Morch, 1853. 



Gomphina maorum E. A. Smith, 1902. 

 Genus Protothaca Dall, 1902. 



Protothaca crassicosta (Deshayes, 1835). 

 Genus Paphia Bolten, 1798. 



Subgenus Ruditapes Chiamenti, 1900. 



Paphia intermedia (Quoy and Gaimard, 1835). 



fabagella (Deshayes, 1854). 



Genus Venerupis Lamarck, 1818. 

 Venerupis elegans Deshayes, 1854. 

 — — reflexa Gray, 1843. 

 - siliqua Deshayes, 1854. 



I give notes with regard to the emendations proposed, but, as I have not 

 thoroughly studied these shells, the grouping of species is based upon Suter's 

 interpretation of Dall's results. I have, of course, critically examined all 

 the species and the nomination, but more than that is necessary in a difficult 

 group such as this. 



Orbiculus (Megerle, 1811). [P. 977.] 



This is sectionally used for the species Dosinia caerulea (Reeve, 1850), 

 but I have dispensed with it altogether, placing that species under Dosin- 

 orbis Dall, 1902, of which Phacosoma Jukes-Browne, 1914, upon the latter's 

 own premises, must be considered a synonym. He argued that Dosinorbis 

 was superfluous, as the characters given by Dall were of little value ; he 

 then proposed Phacosoma for a well-marked group, and referred the type 

 of Dosinorbis to his section. Further, Pectunculus Da Costa, 1778, ante- 

 dates, and is equivalent to Orbiculus Megerle, 1811, according to Jukes- 

 Browne and Dall. 



Dosinia caerulea (Reeve, 1850). [P. 977.] 



As synonyms, Hedley (Proc. Linn. Soc. N.S.W., vol. xxxviii, p. 269, 

 1913), from examination of types, records Dosinia diana A. Adams and 

 Angas, Proc. Zool. Soc. (Lond.), 1863, p. 424 ; and Dosinia cydippe Adams, 

 Proc, Zool. Soc. (Lond.), 1855, p. 224 (1856). 



