470 CARBONIFEROUS TRILOBITES OF AUSTRALIA, 



from Queensland). These fossils weie those which chiefly served 

 Mr. Etheridge to found his varietal species Griffithides aemini- 

 ferus var. australasica on. After a close study of these remains, 

 I am compelled to dissent from his conclusions concerning them. 

 They cannot belong to the above species, because the glabella 

 possesses supplementary basal lobes, a feature by some palaeon- 

 tologists thought to be of generic significance, and which G. 

 seminiferus does not possess. Again, these pygidia have thirteen 

 rings in their axis, and eleven pairs of segments in the pleursp. 

 In these parts, G. seminiferus has twelve and nine respectively. 

 These differences alone would render the specific identity of the 

 two forms invalid, but these are not the only differences between 

 them. As far, then, as the fossils under present consideration 

 afford evidence, Mr. Etheridge's varietal species fails. The part 

 of the cephalon on this same specimen of rock is very imperfect, 

 but it shows, on the glabella, similar but clearer granulation, 

 because the granules are not worn off by weathering, similar 

 glabellar basal and supplementary lobes lo that and those 

 respectively found on the cephalons here determined to belong 

 to Phillipsia vjoodwardi. The only features not visible on the 

 glabella of the fragmentary cephalon, to make its identity with 

 the latter certain, are the mesial and anterior glabellar furrows; 

 but these are barely visible on some glabellse of P. woodwardi. 

 Lastly, the pygidium represented in Plate viii., fig. 6 (oj). cit.), 

 which was considered by Mr. Etheridge to be a normal pygidium 

 of his P. duhia (P. stanvellensis mihi) is here joined with the 

 present species by me. It is undoubtedly inseparable from the 

 other pygidia now joined with the species above described, and 

 certainly is not at all closely related to the pygidia of P. stan- 

 vellensis mihi [P. duhia Eth. fil., op. cit., PI. viii., fig.o). 



Mr. Etheridge has already called attention to the Proetus-like 

 aspect of the cephalon of the present species. The singular form 

 of this part of the fossil makes it unnecessary to point out in 

 detail the features which separate it from other species of 

 Phillipsia. 



Log. and Hor. — Stoney Creek, Stanwell; Crow's Nest and 

 Trilobite Ridge, Mt. Morgan, Queensland, etc. Associated wit |i 



