SMITH : AUSTRALIAN LAND -SHELLS. 93 



angizlatus, leviter descendens ; spira brevis, obtusa ; apertura oblique 

 lunata, parva ; peristoma album, margine superiore vix expanso, 

 basali latiore, reflexo, supra umbilicum dilatato. Diam. maj. 11 "3, 

 min. 10 mm.; alt. 6*3 mm. Apertura 3'5 longa, 4 lata. Hab. — 

 Burner Range, Derby District, N.W. Australia. 



A shell of a general brownish horn colour above, and paler 

 beneath. The strigation or mottling of the upper surface does not 

 extend beyond the peripherial angulation. 



Helix (Trachia) Bathuestensis, n.sp. PI. YII. Fig. 20. B.M. 



Testa (pallide cornea ?) depressa, orbicularis, mediocriter iimbilicata, 

 nitida ; anfractus 5-5 g, convexi, lente crescentes, superne costulis 

 tenuibus confertis arcuatis obliquis ornati, apicales duo lajves, ultimus 

 in medio rotundatus, infra peripheriam striis vel liris tenuioribus 

 ornatus, antice leviter descendens ; apertura late lunata, obliqua ; 

 peristoma album, undique mediocriter expansum et reflexum. Diam. 

 maj. 15 "5, min. 13 mm. Apertura 5*5 alta, 6 lata. Hah. — Heywood 

 Island and Bathurst Island, King Sound, N.W. Australia. 



Two dead specimens, one from each of the above localities, are all 

 that was found of this species. It is very like H. Delessertiana, 

 of Le Guillou, which occurs further north in the islands of Torres 

 Straits, but may be distinguished by the finer, closer, and more 

 regular character of the costulations. The specimen from Bathurst 

 Island has hali a whorl less than the other example from Heywood 

 Island, and is in consequence a little smaller, its greater diameter 

 being 13-5 millimetres. It is, however, adult, having completed 

 the formation of the peristome as in the other specimen. The 

 umbilicus is pervious to the apex, and the convolution of the whorls 

 is observable within. 



Helix (Trachia) Gascotnensis, n.sp. PI. VII. Fig. 13. B.M. 



Testa depressa, orbicularis, late et aperte umbilicata, albida, 

 solidiuscula ; anfractus 4, convexi, sutura profunda sejuncti, confertim 

 et minute granulati, rugis obliquis vel plicis irrcgularibus rugosis 

 instrueti, apicales duo Iseviores, ultimus ad peripheriam rotundatus vel 

 subangulatus, subtus rugosus, antice conspicue descendens ; spira 

 plana, apice obtuso, parum prominulo ; apertura subhorizontalis, 

 rotundata ; peristoma continuum, anfr. ultimo appressum, anguste 

 expansum, margine inferiore latins dilatato. Diam. maj. 12"5, min. 

 10 mm.; alt. 5"5 mm. Apertura 4 alta, 4*5 lata. Hah. — Gascoyne 

 District, W. Australia. 



Three specimens of this species were presented to the British 

 Museum (Natural History) in 1891 by Mr. B. B. Woodward, that 

 were collected by his cousin, Mr. H. P. Woodward. It is similar 

 in form to H. cyrtopleura, Pfr., from South Australia, biit differs 

 in size and sculpture. It is smaller, flatter, and has the peristome 

 more decidedly continuous. Rather a powerful lens is necessary in 

 order to observe the fine granulation which covers the entire surface. 



