90 PROCEEDINGS OF THE MALACOLOGICAL SOCFETT. 



"Worn specimens, one of which is in the British Mnscum (IS'atnral 

 History), are known, consequently it is uncertain whether in fine 

 condition it does not exhibit colour-bands. 



Helix (Ruagada) inconvicta, n.sp. PI. YII. Fig. 10. B.M. 



Testa depressa, medio plus minus carinata, anguste umbilicata, 

 albida vel dilute fusco-alba, infra carinam vel angulum zona grisea 

 subpellucida cincta, striis incrementi obliquis arcuatis tenuissimis 

 sculpta ; anfractus 6 regulariter et lente crescentes, convexiusculi, 

 sutura parum profunda sejuncti, ultimus antice leviter descendens, 

 postice in medio carinatus, carina aperturam versus evanida ; spira 

 brevis, convexa, conoidea, ad apicem mediocriter obtusa ; apertura 

 oblique lunata, intus pallidissime rufescens ; peristoma album, expan- 

 sum et reflexum, margine columellari incrassato, intus vix subdentato, 

 superne dilatato, umbilicum semi-obtegente. Diam. maj. 20-5, min. 

 17\5 mm. ; alt. 12 mm. Apertura 7 alta, 9 lata. Ilah. — Oscar 

 Ranges, 120 miles south-east of King Sound, N.W. Australia. 



This species is much more dopresstid than the other forms of 

 Rhagada from this part of Australia, and is remarkable for its 

 carination of the body- whorl. It may be likened to a specimen of 

 M. convicta which (if it were possible) had been much compressed, 

 thus producing an angular periphery. The single specimen in the 

 British Museum (Natural History) was presented about five years 

 ago by Dr. J. C. Cox, of Sydney. 



Helix (Rhagada ?) plectilis, Benson. B.M. 



Pilsbry, T.c. p. 188. 



Hah. — Shark's Bay and Swan River, W. Australia. 



Helix (Rhagada ?) cabchamas, Pfeiffer. 



Pilsbry, T.c. p. 189. 



Hab. — Shark's Bay, "W. Australia. 



Helix (Hadea) obliquikitgosa, n.sp. PI. YII. Fig. 17. B.M. 



Testa globosa, anguste perforata, alba, epidermide tenui lutescente 

 induta, lineis incrementi obliquis striata, uudique irregularitcr oblique 

 corrugata ; anfractus 5 convexi, celeriter crescentes, sutura profunda 

 sejuncti, ultimus magnus, globosus, antice leviter descendens ; aper- 

 tura obliqua, late lunata, alba ; spira mediocriter elata, ad apicem 

 mediocriter obtusa ; peiistoma leviter incrassatum, superne vix ex- 

 pansum, inferne paulo reflexum, margine columellari latins dilatato 

 pra3cipue ad insertionem, umbilicum partim obtegente. Diam. 

 maj. 21, min. 16-5 mm.; alt. 18 mm. Apertui'a 14 longa, 10 lata. 

 Hab. — Parry Harbour, N.W. Australia. 



Only dead specimens of this species were obtained, almost entirely 

 denuded of the periostracum. The remains of it, however, within 

 the aperture show that it was of a yellowish tint. One example, 

 fresher than the rest, has the spire of a very pale brownish tint, 

 so it is likely that this species, when living, is of a light brownish 

 colour above and covered with a thin periostracum. 



