BY JOHN MITCHELL 



49:; 



rhilli)>sia brevictp-^ Mitchell. 



Fi<;K.2, 3. — Photo of a specimen showinj; portions .of two cephalic-shielda 

 and a very perfect pyicidiiini, whose characteristics are represented. 

 Mark the peculiar contraction near the middle of the tail, which 

 suggests a short tail, and a portion of a thorax. Fig.3, a portion 

 of a cephalon. shoN\ inu- limb, mesial furrow on the right, etc. (Coll. 

 Mitchell). 



riifUipsia connollii Mitchell. 



Figs. 4-7- — ^A doisal and side-view of the only pygidium known. The pro- 

 portionately very wide border, pi^ominent axis, granulation, and 

 other features are faii-lj- well shown. In Fig. 6, the axial and pleural 

 divisions have been intensified slightl3'. (Coll. (Geological and 

 Mining Museum, Dept. of Mines, Sydney. No. F 1497). 

 Philllpsia sfanvel/ensis Mitchell. 



Figs.S-lO. — Dorsal and side-view of a very perfect tail, and showing the 

 very prominent, mildly serrated axis clearlj'. In this specimen, all 

 the axial rings (12. doubtfully 13) are visible, as also are eight 

 pleural segments, and the steep striated border. (Coll. (Geological 

 Museum, Dept. of Mines, Brisbane. No.F977). 

 PIn/lipsia xfroiidennx Mitchell. 



Fig. 11. — A medium-sized tail, having the dorsal part of the axis damaged; 

 but other\\ise exhibiting the normal fetitures. (Coll. Mitchell). 

 Phillipsia icoodicardi Eth, fil. 



Figs. 12-13.— Portions of cephalons. Fig. 12 shows the glabellar furrows, 

 strong neck-ring, and supplementary lobes, etc., very well. Fig, 13 

 exhibits these features less clearly. Fig. 12 is from the same speci- 

 men as that figured by Mr. Etheridge, Junr., {op. cit., PI. xliv., 

 fig.5). (Coll. Queensland Museum, Brisbane, No.707; and Geological 

 Museum, Dept. of Mines, Brisbane, No.F 1017). 

 PhiUipsia vmodu:ardi{''.) Eth. fil. 



Fig. 14. — This photo shows the fragments of trilobite-remains, on which 

 Mr. Etheridge chietly founded his species G. >*emmiferus var. au8- 

 tralasica. On this specimen also occurs the tail of Brarhymetopus 

 dunstani. It remains to be proven that they are not portions of the 

 above species. The tails shown on this specimen have the same 

 number of axial and pleural divisions, and kind of granulation as 

 those included with the cejihalons of P. ivoodwardi. (Coll. Queens- 

 land Museum. Brisbane. No. 712). 



Plate lii. 

 Phillipsia inoodwardi{'t) Eth. fil., and Brachymetopus dwnstani M'ltaheW. 

 Fig.l. — This represents a portion of specimen No.712 of the Queensland 

 Museum, Brisbane. On it is the pygidium assumed to belong to 

 P. iL'OodAi-a rdi , and a pygidium of Jir. davMani in front of the arrow; 

 ( X 3). 



