GASTROCOPTA. 119 



*' Few species have been described from Australia, and the 

 present is the first representation of the genus in Victoria. In 

 general arrangement the dentition is fairly constant, but speci- 

 mens have b^en examined showing the teeth a trifle stronger. 

 As regards measurements the species is subject to variation, 

 the paratype figured being 2.3 x 1 mm. Pupa larapinta Tate 

 and P. nworeana Smith, from Central Australia, bear some 

 resemblance, but may be distinguished by their broader con- 

 tour and more convex whorls" {Gabriel). 



In view of its wide distribution, my suggestion (Vol. 24, 

 pp. 158-9) that G. pediculus was imported into New South 

 Wales within the human period, seems improbable though not 

 impossible. It may be a very old and conservative species 

 which reached Australia in the Pliocene. If Pupa margaretae 

 Cox, from Wallaroo, South Australia, is also pediculus, its 

 range will be further extended. New collections at that place 

 will be required to settle this point, as the type of margaretae 

 seems to be lost. 



In 1923 I found pediculus abundant at Tweed Heads, Rous 

 Co., N. S. Wales, and the var. queenslandica in Brisbane, 

 Queensland. 



Gastrocopta niobe (Fulton). PI. 22, fig. 2. 



Man. Conch, vol. 24, p. 153 ; vol. 27, p. 209. Tenimber Is. 



Mr. Fulton has been so good as to send a paratype specimen 

 which he compared with the type in Brit. Mus., and which is 

 here illustrated, pi. 22, fig. 2. As I noted in vol. 27, it is 

 identical with the later G. moellendorffiana Pils., 1917, from 

 Bohol, M. C. vol. 24, p. 145. The description given on p. 145 

 applies fully to this paratype, which measures, length 1.9 mm., 

 diam. above aperture 1 nun. It will be seen that it bears little 

 resemblance to the original figure and description of P. nioie ; 

 the species could never have been identified by them; but it 

 serves to illustrate the difficulties which beset a monographer 

 of the Pupillidae. Many of the descriptions and figures of 

 minute species are misleading. 



G. niohe belongs to the subgenus Sinaliimda. 



