FULTON : LIST OF SPHOEROSPIRA SECTION OF THERSITES. 7 



12.— T. eOOkensiS, Brazier. 

 Proc. Linn. vSoc. N.S.W. (i), 1875, P- ^7- 

 = toinsoni, Braz. : P.L.S.N.S.W. (i) 1876, p. 97. 

 = cuokensis, Braz. : Tryon's Man. of Conch., vol. vi., p. 97. 

 Loc. — Gould Is., Rockingham Bay, and Frazer's Is., Queensland (not 

 Cooktown, _/z'7e Brazier). 



This has the same microscopic sculpture as hehia>^, but is smaller, darker- 

 coloured, the aperture not quite as broad and slightly less oblique. The 

 shell is of a somewhat thicker substance, and the colour bands do not show- 

 clearly through the aperture as in helnas, the interior being almost opaque 

 whitish ; the peristome of cooken^tk is also thicker and darker in colour 



13.— T. mulgrravensis, i^ia/ier. 

 PI. I, fig. I. 



P.Z.S., 1872, p. 21. 



= inulijracei, Braz. : Proc. Roy. Soc. Queensland, 1889, p. 10 1. 



Loc. — Palm Is., N.E. Australia. 

 With regard to this species, figured here for the first time, there must, I 

 think, have been some error in the dimensions given, viz., alt. i in. i line ; 

 greater diam. 2 in. 4 lines. (Alt. 27 ; diam. 58 millim). A shell of these 

 dimensions would be a most remarkable form for this group. A specimen 

 from the collection of the late Capt. C. E. Beddome of Tasmania, who had 

 many shells named by Brazier, measuring alt 32 ; maj. diam. (including 

 peristome) 34 millim., answers better to Brazier's description, " turbinately 

 globose." 



Since writing the above Mr. Charles Hedley has been kind enough to 

 measure the type specimen in the Australian Museum and gives the follow 

 ing dimensions : alt. 30 ; maj. diam. 38 millim. 



I have only seen one specimen. 



T. mulgpavensis v. palmensis, Brazier. 



PI. I, fig. 5,6. 

 Proc. Linn. Soc. N.S.W. (i), 1876, p. 105. 

 Loc. — Palm Is., Queensland. 



An extremely variable form, the typical specimens being solid and 

 globose-conic whilst others are depressed and of thin substance, resembling 

 ichartoni. The microscopic sculpture is the same as that of Jiehiatf, but 

 pahuenais is larger, has the umbilicus more open and is further distinguished 

 by it uniformly coloured peristome (which may be dark or whitish) the colour- 

 bands not extendinLT to the edge as in hehias. 



