616 LAND AND FRESH-WATER MOLLUSCA OF NEW ZEALAND, 



Diplomviatina holds its place upon slender evidence. Moreover, 

 the WHOLE of the species (excluding one or two imperfectly under- 

 stood fluviatile forms) are now known to be strictly endemic 

 The supposed community with Northern Australia was based 

 (Trans. N.Z. Inst. xvi. p. 188) on the fictitious existence in New 

 Zealand of Paryphanta millegani, Pfr,, Hadra reinga, Gray, 

 Cristigihha taranaki, Gray, and Rhytida rapida, PfeifFer, and on 

 the equally fictitious presence in Australia of C. kivi, Gray, T. 

 Ophelia, Pfr., C. ziczac, Gould, and 0. coma, Gray ; while the pre- 

 sumption that Amphidoxa extended from Juan Fernandez to New 

 Zealand countenanced the theory of relations with South America 

 {vide Manual of Conchology (2), viii. p. 73). 



A remark by Crosse has hardly received the attention which it 

 merits. He says (Journ. de Conch, xxviii. p. .37), " It is interest- 

 ing to notice that the terrestrial and fluviatile molluscan fauna of 

 New Zealand approximates more to that of New Caledonia, in 

 spite of the considerable distance that separates the two countries, 

 than to that of Australia. In both archipelagoes the group of 

 Placostylus is well developed and contrasts remarkably with the 

 minute and fragile Helices, most of which are small and thin. 

 The genus Melanopsis is common to both, as well as the genus 

 Diplommatina." 



Those desirous of comparing the fauna of New Zealand with 

 those of the surrounding countries may consult the following 

 catalogues. A list was published of the land shells of Norfolk 

 Island by Mousson, Journ. de Conch, xxi. pp. 110-115 ; another 

 of the land and freshwater shells of Lord Howe by one of us, 

 Records of the Australian Museum, i. pp. 134-144 ; of the land 

 and freshwater mollusca of New Caledonia by Gassies, Faune 

 Conchyliologique de la Nouvelle Caledonie, pt. iii. pp. 98-107. 

 Correct lists of the mollusca of the New Hebrides, the Solomons, 

 the Admiralties, New Ireland and New Britain are still desiderata; 



