42 ^I. C. Semper on a new Genus o/'Tcstacellidje. 



VI. — On a new Genus o/'TcstacoirKUx? in Anstrnlia. 

 By C. Skmpeh. 

 It is a fact often complained of tliat it is extremely (llfficnlt or 

 even impossible to olitain the animals of tropical shells, espe- 

 cially of the land-shells. This, indeed, is to be re^n-etted the 

 more, as even concholo-j^ists begin to miderstand that the 

 examination of the animals will furnish many interesting ob- 

 servations, especially valuable for the geography of the species. 

 Very lately I met with an instance which may be Avorth 

 a short notice. Through the kindness of Herr v. Frauenfeld 

 I obtained two well-})rescrved specimens of IleUx tnccf/iia/is, 

 Pfr., which, ap])arently, is common in Australia, the examina- 

 tion of which proved that I had a genuine Testacellid before 

 me. The jaw is entirely wanting ; and, as the drawing shows, 



lihjtida tnccqualis, Pfr. 



the teeth of the tongue so completely resemble those of Glan- 

 dina (of which genus I have had occasion to examine three 

 species) that this Australian lielicean must necessarily be 

 ranged close to Glandina. 



In the work of Albcrs on the Helicidse this species is placed 

 in the group Ehytida, which is considered there the last sub- 

 genus of those allied to Patnla. The type of the subgenus is 

 Helix Greemooodi of New Zealand, which is nearly related to 

 the Australian species ; however. Helix Stranjei, Pfr., living 

 also in Australia, comes nearer to it. The last species has 

 lately been classified in the genus Zonites by Mousson (Journ. 

 de Conch, scr. 3. vol. ix. p. 36) ; and indeed it cannot be gain- 

 said that both those flat7?//7///V/a-species possess a ccrtniu /uthitus 

 of Zonites 'j yet Crosse rightly remarks {iOid. p. 57. 1) that it 



