BY JOHN MITCHELr.. 443 



11. Griffithides sweeti Etheridge, Junr., Proc. Linn. Soc. 

 N. S. Wales, 1894, p. 528, PI. xxxix., f.3. 



The writer lias not seen the original specimen. Judging from 

 the description and illustration, it is a very unusual type. See 

 description further on. 



12. Griffithides sp. ind., Etheridge, Junr., Mem. Geol. Surv. 

 N. 8 Wales, Pal. No.5, Pt. ii., 1892, p.l30, PI. xxii., figs.lo, 16. 



It is not improbable that this may be identical with Phillipsia 

 collhisi. 



From, the foregoing review, the following conclusions have 

 been drawn, viz. : — 



i. That, of the nine species of Australian Carboniferous trilo- 

 bites previously described and named, only the five following are 

 worthy of recognition. 



1. lirachymetojnis strzeleckii McCoy. 



2. Griffithides dubius Eth. 8enr. 



3. Griffithiiies sweeti Eth. Junr. 



4. PhiUipsia icoodfvardi Eth. Junr., Geol. et Pal. Queens- 



land and New Guinea, p. 215, PI. 7, figs. 11, 13. 

 b. PhillijJsia yrandis l^lh. iuin\, oi which the type is the 

 Mt. Morgan form. Mem. Geol. Surv. N.S. Wales, Pal. 

 No.5, Pt, ii., 1892, p. 128, PI. xxi., fig.5. 

 ii. That the two determinations made by the late Prof. i)e 

 Koiiinck are incorrect, and scientifically valueless. 



Family PROETID^ Steiiib. 

 Genus Phillipsia Portlock, 1843. 

 Dr. H. Woodward's* description of the genus is as follows: — 

 "General form oval; glabella with nearly parallel sides, marked 

 by either two or three pairs of short lateral furrows; the posterior 

 angles, forming the basal lobes, always separated by a circular 

 furrow from the rest of the glabella; eyes large, reniform, surface 

 delicately faceted; cervical furrow deep; free cheeks separated 

 from the glabella by the axal (facial) suture, which forms an 

 acute angle with the circular border of the cheek in front of the 



* Moil. Brit. Carb. Trilobites, 1883-4, p. 11. 



