474 CARBONIFEROUS TRILOBITES OF AUSTRALIA, 



Cephaloii and thorax unknown. 



Sp. Chars. — Py^ic<t?AWi sub-semicircular, width 15 mm., length 

 11mm.; smooth and moderately inflated. Axis moderately 

 convex, tapering very gradually, and terminating bluntly with 

 a spread rather greater than half that of the first ring; anterior 

 width about equal to that of one side-lobe; consisting of eighteen 

 rings, some of which show traces of having been very mildly 

 tuberculated; axial furrows faint. 8ide-lobes convex, with no 

 decided fulcra, segments thirteen, or doubtfully fourteen, mildly 

 recurved, not crossing the border; border of moderate width, 

 steep, smooth, and separated from the pleural segments by a fine 

 suture. 



Ohs. — This pygidium was briefly described by Mr. Etheridge 

 {loc. cit.), but not specifically named, though he stated that it 

 possessed certain features which clearly indicated that it was 

 a new species. It differs from all other species of Phillipsia and 

 Griflithides known to me. 



Loc. and IIor.~ Binge Berry, Rouchel Brook, near Muswell- 

 brook: County Durham. 



Phillipsia dungogensis, sp.nov. 



Phillijjsia sp. ind. {b), Eth. fil., Mem. Geol. Surv. N. S. Wales, 

 Pal. No.5, Pi. ii., 1892, p.l29; PI. xxii., fig.14. 

 (Plate xlvii., figs.6, 7). 



Complete form unknown. 



Sjy. Chars. — Fygidium sub-semicircular, very moderately con- 

 vex, finely granulated throughout, greatest width 22 mm., length 

 16 mm. Axis mildly convex, consisting of fourteen annulations, 

 the furrows and ridges of which are respectively shallow and 

 low, diminishing very slightly in width posteriorly, the end 

 being wide and rounded, bases of the rings not tuberculate, 

 anterior width less than one side-lobe: axial furrows fairly dis- 

 tinct. Pleui-ie gently inflated and sloping from the axial furrows; 

 segments twelve pairs, which are very completely fused, the four 

 anterior pairs reaching to the outer margin, medial furrows wide 

 and shallow, ridges not prominent and showing no sutures : 

 border narrow and continuous. 



