BY JOHN MITCHELL. 481 



Side-lobes, between the axial furrows and fulcra, rising verv 

 gently, and thence are depressed almost at right angles, seg- 

 mental ends strongly faceted, and the ridges and vallevs strong 

 and deep respectively, segments strongly angulate at the fulcra, 

 the whole thoracic surface was finely granulated. 



Pygidium subelliptic, finely granulated, strongly convex: axis 

 prominent, rings thirteen, the anteiior one being somewhat over- 

 lapped by the last thoracic one, decreasing in spread gradually and 

 ending prominently at about half of its anterior spread, a little 

 short of the border; axial furrows distinct, side-lobes stronglv 

 convex, granulated, consisting of eleven segments, each verv 

 gently and increasingly curving posteriorly, segmental ridges 

 strong, valleys deep; -border entire, steep, very finely granulated, 

 middle thickened and relatively wide, separated fi-om the pleural 

 segments by a narrow furrow, accentuated by punctations at 

 each segmental end. 



Ghiffithides dubius Etheridge Senr. 



Griffithldes dubius Etheridge Senr., Qiuu't. Journ. Geol. Soc, 

 1872, Vol. xxviii., p.338, PI. xviii., fig.7. 



Fhillipsia dubia Eth. fil , Geol. Pal. Queensland and New 

 Guinea, 1892, pp.2U, 215, PI. 7, fig.l2. 

 (PI. liii., fig,7). 



The original description is as follows: — 'vHody elongated, oval, 

 length about twice the width, sides parallel. Axis width of 

 pleurje. Thoracic segments 10 to 12. Pygidium rounded, 

 margins entire; axis composed of ten segments, not extending 

 quite to the posterior margin. Cephalic portion much crushed; 

 glabella small and round anteriorly, furrows indistinct. Owing 

 to the crustaceous test being removed, we have no means of 

 arriving at the condition of the original ornamentation; there 

 are, however, indications of tubercles upon the axis of the 

 pygidium." 



"Zoc. Don River, Queensland. Form. Carboniferous." 



The whereabouts of the type-specimen I have not been able to 

 discover, and, consequently, cannot add anything to the above 

 description. 



