200 



1854 Oxystele Adelaides, H. and A. Adams, Genera of 



Recent Molluscs, vol. 1, p. 427. 

 1873 Oxystele Adelaide, Phil ; Paetel, Catalog der Conch. 



Sammlung, p. 74. 



1876 Diloma australis, Tenison-Woods, Papers and Proc. 



Royal Soc., Tasmania, p. 145. 



1877 Trochus (diloma) australis, Tenison-Woods, Proc. 

 Royal Soc, Tasmania, p. 43. 



1880 Trochus Adelaides, Phillippi; Fischer in Kiener Coq. 

 Vivantes. Genus Trochus, p. 210 



1884 Diloma australis, Tenison-Woods; Hutton, Proc. 

 Linn. Soc, N.S.W., vol. 9, p. 368. 



1 have the original specimens of this species and many 

 other forms collected by my father-in-law, Captain Thomas 

 Rossifcer, in 1841, the year that he saved Mr. John Byre (now 

 Sir John Eyre) from starvation, when on his ever memorable 

 trip overland from Adelaide to King George's Sound Speci- 

 mens of this I distributed some years ago under the name of 

 Trochus Adelaides, Phil, they having been identified by the 

 late Messrs. H. and A. Adams, but for some unknown 

 reason the Rev. Tenison-Woods redescribes it as Trochus 

 australis. I have seen it in collections named Trochus odontis 

 variety, Gray. The Trochus Adelaides is spiraly sulcated 

 and ornamented with pale yellow and numerous pale brown 

 undulating lines, margin of the peristome tinged with green. 

 This species has evidently been taken for the young of 

 Trochus (Trocochochlea) concameratus, Gray, not Trochocochlea 

 striolatus, Wood!! as quoted by the Rev. Tenison-Woods. 

 Professor Hutton described another Diloma, in 1878, as 

 Trochocochlea miinetica from Auckland, New Zealand. It was 

 first described by Dr. Phillippi, in 1848, as Trochus (Phorcus) 

 crinitus, said to have been found in New Holland, an error 

 for certain. I have a specimen of it, collected by Mr. G. T. 

 Rossiter, at Nelson, New Zealand, in 1860. Hutton makes it a 

 new sub-genus Latona of Monodonta. He says : — " Shell as 

 in Diloma, but perforated." This character is of very little 

 value to make a sub-genus of. I have handled hundreds 

 of specimens of. Diloma odontis and Adelaidai, and find that 

 specimens in both are perforated, as well as imperforate, and 

 that the three species — Diloma odontis, Gray; Adelaides, 

 Phillippi ; crinitus, Phillippi = mimetica, Hutton — have the 

 region of the columella tinged with bright pea-green, and the 

 interior of the aperture bright iridescent green I found a 

 splendid specimen of Trochus Adelaides, Phillippi, in a lot of 

 Trochus odontis, collected by Mr. A. Simson, at Patriarchs, 

 East Coast of Flinders Island, Bass Strait. 



