774 PAPUAN LAND AND FRESHWATER SHELLS, 



3. Trachia Froggatti, Ancey, nov.sp. 



(Plate xxxvL, fig. 2.) 



Testa lenticularis, biconvexa, depressa, solidiuscula, mediocriter 

 umbilicata (umbilicus ex parte tectus), superne uiidique denseque 

 granulata, granulis infra carinam ultimi anfractus Itevioribus, 

 basi circa umbilicum paulatim evanidis. Spira convexa vel 

 conoid eo-convexa, obtusa, parum elevata. Anfractus 5 convexi, 

 regulariter et sat lente accrescentes, sutura impressa; ultimus 

 carina mediana acuta exsertaque cinctus, basi lasvior, pallidus, 

 lineis incrementi sculjitus, antice leniter deflexus. Apertura 

 obliqua, extus angulata, lunato-suboblonga, transversa. Peristoma 

 incrassatum, album, undique expansum et reflexum, ad columellam 

 dilatatum, marginibus parum conniventibus, callo tenui junctis. 

 Color stramineo-carneus, infra carinam albidulam fuscescens, basi 

 albidus. 



Diam. maj. 16J, min. 13, alt. 7^-8 mill. 



Hab.^Oscur Range, N.W. Australia (Coll. W. W. Froggatt). 



Judging from the external appearance only, I should have 

 located this remarkable new species in Plectotropis, a group 

 hitherto confined to Eastern Asia and the adjacent islands, 

 including Malaysia, for it much more resembles some Chinese and 

 Japanese forms like Helix trichotropis, Pfr., squarrosa, Gould, 

 than other Australian sj^ecies, save perhaps Helix Howardi, 

 Angas, also a keeled species from the interior of South Australia, 

 which is located by Pilsbry in his section Glyptorhagada. Its 

 peculiar shape, keel, granular surface, reflected peristome, lustreless 

 aspect (except around the umbilicus) and colour may easily 

 separate it from any of the Helices recorded from the same region 

 by Mr. E. A. Smith (vide Proc. Malac. Soc. Vol. i. 1894, 

 pp. 84-99). 



4. Trachia orthocheila, Ancey, nov.sp. 



(Plate xxxvi., fig. 4.) 



Testa orbicularis, depressa, nitida, umbilicata (umbilicus medio- 

 cris, vix ex parte tectus), lineis lajvibus incrementi confertisque 



