502 Transactions, 



will materially restrict its limits. One species was introduced as Trocho- 

 nanina exposita by Mousson, the other as Helix kermandeci (recte kerma- 

 deci) by Pfeiffer. For the former I introduced the genus Fanulum ; for 

 the latter I propose the new genus Kieconcha. The peculiar features of the 

 former may be gauged by the fact that it was recently classed in Medyla 

 (the correct name of this genus is Otesia), the species of which differ 

 entirely in shell characters. It will probably be found to have little rela- 

 tionship with the species hitherto associated with it when the anatomy of 

 the snail is carefully considered. I might add that a report upon the 

 animals of these Kermadec snails is now under consideration, and will 

 probably later appear in these Transactions. The genus Kieconcha seemed 

 a necessity, as previously the species had been classed first in Microcystis 

 and then in Macrochlamys. The first was easily seen to differ entirely in 

 shell characters, whilst the latter has been shown to be restricted to India. 

 Kieconcha somewhat recalls the north Australian Nitor. If this suggestion 

 should be confirmed it may have been a companion with Helicarion from 

 the north. Nothing like Kieconcha or Fanulum otherwise occur in the New 

 Zealand biological region. 



Ten species were obtained which may be classed in the family Endo- 

 dontidae, as that term was used by Pilsbry. I have already given my 

 reasons for objecting to such a group, and so far I have received little but 

 encouragement in the course I adopted. I am now making a conchological 

 survey of the Australasian l ' Endodonts," so will defer my further remarks 

 until a future date. 



I included three species in Ptychodon, pointing out that the usage of 

 Thaumatodon, unless restricted genera were utilized, was incorrect. My 

 largest species was of the aspect of Thaumatodon, whilst the two lesser were 

 of quite a different nature. Three species were ranked under Charopa, but 

 here again three different styles of shell were included, and the main reason 

 for so classing them was the unarmed mouth. For one flattened widely 

 umbilicated shell I introduced the subgeneric name Discocharopa. as I found 

 a similarly formed species in every detail occurred in so far away a locality 

 as Bass Strait. I have since recognized the same subgeneric form in 

 Queensland. The Ptychodon which I would consider of Thaumatodon 

 aspect is a Polynesian form of shell, whilst the other Ptychodon are nearly 

 related to New Zealand species. All significance of the latter fact is mini- 

 mized by our entire ignorance of the minute forms which must abound in 

 Polynesia. Research may show this latter Ptychodon to be quite common 

 in the northern island groups. 



The same remarks apply to the Charopoid forms, and even more forcibly 

 to the two tree-dwelling species I classed in the " Flammulinoid " section 

 of the Endodontidae . I suggested that this section should be given family 

 rank as the family Flanimulinidae, but so far apparently no anatomical 

 features are known whereby a diagnosis can be prepared. 



For two species I introduced a new generic name, Paralaonia. Since 

 my paper was completed I have studied the Norfolk Island molluscs, and, 

 making comparisons, I believe that three species of this genus may be 

 distinguished at the Kermadecs. However, I include this genus with mis- 

 giving in the family Endodontidae, and have noted its wide range through- 

 out eastern Australia, where it seems to be well represented. According 

 to one authority, the species I would allot to Paralaonia could be classed in 

 Pkrixgnathus, whilst another claims their near relationship to Flammulina 

 Such diversity of location sufficiently excuses a new generic term. 



