IIOKN EXPEDITION — SUMMARY. 149 



one of wliicli {P. inariiioratus) extends into Soutli Australia and the interior of 

 Victoria. Probably tlio distribution of Ebenavia will be found to extend into 

 West Australia. 



Equally ouri(jus is the distribution of Cerauiodaetylus, which is only recorded 

 hitherto from Persia and Arabia. In the Centre it is found only alony the Finke 

 near Charlotte Waters. 



The Ophidia are too imperfectly known tu make it safe to draw any conclusion 

 fruiii the small series obtained. It is quite possible that the number of species in 

 the Centre is veiy few, but future work will probably consideraljly increase the 

 number yet known. Out of the twelve species secured one {Iloriwa pulchclla)^ the 

 re|)resentative of a new genus, is known only from Charlotte Waters ; Furiiui 

 rainsayi is the connuonest form in the southern part extending across to W(;st 

 Australia and to the iiiteiioi' of New South Wales, whilst a new species, IIoplo- 

 ccphalus stir/ingi\ is widely distributed from Alice Springs in the north to 

 Oodnadatta in the south. 



Anipliibia. — The Amphibia are rem.iikablc, as might perhaps have been 

 expected in such a r'egion, by (1) the paucity of species arrd (2) the gr'eat numl>ers 

 irr which at certain scasorrs the irrdividuals of the species r'epresented ar'e fourrd. 

 At the pr-eserrt time some sixty-tive species are known in Australia. Only six ar-e 

 recorded from Cerrtr-al Austr-alia. 



Irr corrtrast to the Mar'supials arrd Lacertilia there is very little atKrrity 

 betweerr the Ampliiljiarr fauna of West and Cerrtral Australia ; the orrly common 

 species is Hyla rubella^ which is also found irr New South Wales, Queenslaird arrd 

 the Northern Territory. 



The characteristic Amphiljia of the Cerrtrvil regiorr C(jrrsist of ilve species 

 {LiinnoJy Hastes ornatus, Cliiroleptes platyapha/us, C. bnvipal/na/iis, IleUioponcs 

 picfus, Hyla rubella'), four of wlrich irray be described as burrowing frogs and they 

 ar-e also inhabitants of the interior of the east and south-east parts of the continent. 

 They may either repr-esent the direct descerrdarrts of forms which inhabited the 

 region duriirg rrrost favourable climatic corrditions — a supposition which is probably 

 true irr regard to Hyla rubella — or they may be species which have immigrated 

 fr'orrr outlyiirg easterir aird south casterrr parts irr conrparatively recent tirrres, which 

 is pr-obably true in the case of L. oriiatus, Cliiroleptes platyceplialus, C. palmatus 

 arrd JPeleioporus pictus, which ar'e elsewher-e burrowing fr'ogs and so are capaiile of 

 migratirrg acr'oss country dry for' the greater part of the time. The last rramcd 



