776 PAPUAN LAND AND FRESHWATER SHELLS 



corneo-albidula, basi sublactescens ad suturam penultimi dilute 

 fuscula. Spira concolor, obtusa, depressa, parum elevata. An- 

 fractus 4^ regulariter sed celeriter accrescentes, convexi, sutura 

 impressa; ultimus rotundatus, parum depressus, basi convexus, 

 satis altus, antice longiuscula et perparum deflexus, supra medium 

 zona fusca angustiore cinctus. Apertura ampla, distincte obliqua, 

 rotundata, transverse subovalis, lunata. Peristoma expansius- 

 culum, tenue, basi intus incrassatum, expansum, ad columellam 

 magis dilatatum, album, marginibus subconniventibus. 

 Diam. maj. 15|, min. 12|, alt. 8| mill. 



Hab. — Oscar Range, with the preceding species (W. W. 

 Froggatt). 



A single specimen was sent, and it much differs from any other 

 W. Australian species enumerated by Mr. E. A. Smith, the 

 nearest allies perhaps being Helix millepimctata, Sm.,(from Baudin 

 and Cassini Islands), and //. Bathurstensis, Sm., (from Heywood 

 and Bathurst Islands), but they differ much in texture, colour, 

 sculpture, and number of whorls. T. monogramma looks indeed 

 very much more like some Asiatic species {T. propinqua and 

 others) than any Australian species known to me. It resembles 

 Helix similaris, but is thinner, more depressed and certainly 

 belongs to another group. 



In the lot of shells obtained by Mr. Froggatt there were also 

 specimens of the following : — 



Rhagada Burnerensis, E. a. Smith. — Oscar Range, W. Aus- 

 tralia. The examples agree pretty well with the original diagnosis, 

 but the ground colour is not white, but pale greyish-brown, 

 luteous-brown towards the aperture and the suture is margined 

 with a fulvous line. The peristome also is fulvous. 



I think this and the allied species are better placed in Rliagada 

 than in Hadra, as Mr. Smith suggested, although they lack the 

 characteristic markings of that genus. 



Rhagada Reinga, Gray. — Oscar Range. All exhibit the 

 median brown line ; the other ones are quite variable. One 

 example is much smaller than the typical ones, measuring only 

 12 mill, in diameter, while the largest measures 17 mill. 



