440 CARBONIFEROUS TRILOBITES OF AUSTRALIA, 



2. Phillipsia eichwaldi De Kon., (non P. eichwaldi Fischer) 

 Foss. Pal. Nouv. Galles du Sud, 1877, Pt.3, p.348, t.24, f.9. 



Under the name of Griffithides {Phillipsia) eichwaldi, De 

 Koninck described a trilobite from Colo Colo, N.S„W., and de- 

 termined it to be P. eichivaldi Fischer; but, as the writer points 

 out further on, this determination was evidently incorrect. Mr. 

 Etheridge, Junr., expressed a similar view (Etheridge, Junr., Mem. 

 Geol. Surv. N. S. Wales, Pal. No.5, Pt. ii., 1892, p.l24). There 

 is little doubt that the presence of this trilobite in Australia 

 remains yet to be established. 



3. Phillipsia dubia Etheridge, Junr., (non Griffithides diihins 

 Etheridge, Senr.) Geol. and Pal. Queensland and New Guinea, 

 1892, pp.214-215, PL vii., fig.5; PL xliv., fig.4. 



Phillipsia dubia Etheridge, Junr., (non Griffithides dnhiiis 

 Etheridge, Senr.) Mem. Geol. 8urv. N. S. Wales, Pal. No. 5, Pt. ii., 

 1892, p.l26, PL xxi., figs.1-4, PL xxii., figs.l2, 13. 



The above two forms were considered bv Mr. Etheridge, Junr., 

 to be specifically identical with Griffi'thides dnhiiis Etheridge, 

 Senr.; and the latter to be generically misplaced. The writer 

 regrets that, with this determination, he cannot agree with Mr. 

 Etheridge. It appears to him that neither of the above trilobites 

 is specifically identical with Grijfithides duhius Eth. Senr., nor 

 with each other. Mr. Etheridge, Junr., wlien describing the 

 trilobite from Binge Berry, Rouchel Brook, New South Wales 

 iloc. cit. antea) pointed out that it diftered from the Queensland 

 form in having eighteen to twenty axial rings in the pygidium 

 instead of eight to ten, which is the number in that of the 

 Queensland form. This alone is suflficient to separate them 

 specifically; but the head-shields of the two also differ. Both 

 forms are here treated as separate species. The writer's view 

 regarding the Queensland Phillipsia dubia is, that it cannot at 

 present be generically or specifically joined with Griffithides 

 dubius; and that the latter species must still be recognised. 

 Only the discovery of a number of specimens of this form, show- 

 ing the stages of development from the immature to the mature 

 state, can satisfactorily establish the proper position generically 

 and specifically of Griffithides dubius Eth. Senr. 



