199 



1849 Trochus odontis, Wood]; Pliillippi in Conch. Cab., 2nd 

 edition, p. 144, No. 174, pi. 24, fig. 7. 



1851 Chlorostoma odontis, A. Adams, Proc. Zool. Society 

 p. 182, No. 22. 



1854 Diloma odontis, H. and A. Adams, Genera of Eecent 

 Mollusca, vol. 1, p. 420. 



1856 Trochus odontis, Gray ; Hanley's Edition of Wood 

 Index Test. Supplement, p. 221, pi. 6, fig. 37. 



1865 Diloma odontis, Angas, Molluscan Fauna of the 

 Province of South Australia. Proc. Zool. Soc, p. 

 182, No, 173. 



1873 Gibbula odontis, Paetel, Catalog der Conch.-Samm- 

 lung, p. 75. 



1877 Trochus (diloma?) odontis, Tenison-Woods, Papers 

 and Proc. Boyal Society of Tasmania, p. 43. 



1880 Trochus odontis, Wood; Fischer in Kiener Coq. 

 Vivantes. Trochus, p. 313, No. 180, pi. 99, fig. 1 



This well-known species cannot he confounded with any 

 other Diloma found either in New Zealand, Tasmania, or 

 Australia. It is of a very smooth, dark-blue colour, with 

 fine zig-zag lines and yellow spots ; interior of the aperture 

 iridescent-green, pea-green round the columella margin. The 

 genus Diloma was founded by Dr. Phillippi in 1845 to receive 

 Conoidal shells, smooth, not umbilicated ; whorls rather few, 

 convex ; aperture subrotund ; columellar lip excavated in the 

 middle and expanded over the umbilical region, produced 

 laterally to join the outer lip ; outer lip thin, unarmed. 



Hab.—" ?" (/ F. Gray) ■ New Holland (Philippi, 



Patter) ; Port Phillip, on the rocks at low water (J. B. 

 Jukes); Cape of Good Hope??? (Hanley); Port Western, 

 Victoria (Quay and Gaimard) ; Port Sorell, North Tasmania 

 (C. E. Beddome) ; Wallaroo, South Australia (G. T. Rossiter, 

 1861) ; rocks at low water St Vincent's Gulf, South Aus- 

 tralia (Professor Tate) ; St. Kilda Beach, Hobson's Bay (/. 

 H. Gatliff) ; Hobson's Bay, Victoria (G. T. Rossiter, 1862) ; 

 Brighton, Victoria (/. F. Bailey) ; Blackmans Bay, Tasman's 

 Peninsula, Port Davey, Swansea, Tamar Heads, Tasmania 

 (W. F. Petterd) ; Patriarchs, East Coast of Flinders Island, 

 Bass Straits {Mr. A. Simsori). 



5. Trochus (Diloma) Adelaide. Philippi, sp. 



1849 Trochus Adelaides, 'Phillip'pi in Conch. Cab. ,2nd edition, 



p. 140, No. 168, pi. 24, fig. 1. 

 1851 Gibbula Adelaiice, A. Adams, Proc. Zool. Soc, p. 



186, No. 22. 



