771 



'The shell is of a -iiiiiforin greenish hue, with a shining vitreous 

 appearance." This description fits the present specimen very 

 well . 



The specimen was taken with Xanthomelon adcockianum 

 and Chloritis squamulosa. 



Xanthomelon adcockianum, Bednall. 



Hadra adcockiaiia, Bednall : 1894, Trars. Roy. Soc, S.A., voL 

 xviii., p. 190. 



Xanthomelon adcockiana, Hedley : 1896, Rpt. Horn Sc. Exp.^ 

 pt. ii., p. 224. 



The writer proposes to place under this head three some- 

 what immature shells taken with Chloritis sqiumiuiosa. They 

 agree almost entirely with Tate's '^Forma typica," ^'^) one of 

 the three groups into which he subdivided this species. Prob- 

 ably the immaturity of the present shells accounts for the 

 slight differences. Compared with the Adelaide Museum 

 specimens, determined by Mr. Bednall, they agree well,, 

 although they are slightly more elevated. They have not,, 

 however, tne height of X. everardeni<i^. In common with the 

 Museum specimens, they are of light-yellow to yellowish-green 

 colour, with well-defined narrow fnscous bands. The type, 

 however, was opaque-white with fuscous bands. 



They were taken at Moorilyanna Native Well, under native 

 fig trees (Ficus 'platypoda). 



Captain White writes : — ''Great quantities of fallen 

 leaves and fruit had collected between the rocks, and it was 

 under this debris that the shells were taken." 



Chloritis squamulosa, Tate. 



Hadra squamulosa, Tate: 1894, Trans. Roy. Soc, S.A., vol. 

 xviii., p. 193. 



Chloritis squamulosa. Tate: 1896, Rpt. Horn Sc. Exp., pt. 

 ii., p. 193, pi. xviii., fig. 10. 



Xanthomelon squamulosa, Hedley: 1896, Rpt. Horn Sc. Exp., 

 pt. ii., p. 225. 



One live specimen only was obtained with the X. 

 adcockianum. The shell is larger than the type, and measures 

 17 mm. (greatest diameter) by 9 mm. (height). The reference 

 of this species to Xanthomelon in 1896, by Mr. Hedley, was 

 done on the evidence derived from an imperfect dissection sent 

 by Prof. Tate. In a recent communication, Mr. Hedley states 

 his preference for Chloritis, and mentions the possibility of an 

 error having been made in the labelling of the dissection in 

 question. 



i^)Vide Tate: Rpt. Horn Sc. Exp., pt. ii., p. 198. 

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