379 
According to Mr. E. O. Thiele there are two limestones, 
a “pale grey," containing Brachiopods and Girvanella and 
This fragmentary condition of such remains is not uncommon 
in our Cambrian rocks, particularly in the Kimberley lime- 
stones and the friable sandstone of Caroline Creek. 
1915.—In the ‘‘Bulletin of the Northern Territory" for 
December, 1915, are photo-prints of a Trilobite cast, found 
by Mr. Surveyor Merrotsy on the Barkly Tableland, eight 
miles east of Alroy Downs; ''the rock matrix is a cherty 
escribed in the present communication as Ptychoparia 
alroiensis, and is the most perfect example of this group of 
animals yet found in the Australian Cambrian. Mr. Mer- 
rotsy’s discovery is one of great importance, indicating a 
further extension eastwards in all probability of the series 
yielding Olenellus forresti, O. browni, Agnostus elkedraensis, 
etc : 
1918.—Some years ago Mr. H. Y. L. Brown forwarded 
to me pieces of a grey-white limestone from Clinton, on the 
Throughout these limestone fragments are the broken-up 
remains of a Trilobite, which appears to me to be quite dif- 
ferent from any one yet found in the Yorke Peninsula. 
III. OBSERVATIONS ON THE SPECIES. 
Genus AcNnostus, Brongniart, 1822 
(Hist. Nat. Crust. Foss., 1822, p. 38). 
AGNOSTUS ELKEDRAENSIS, Eth. fil. 
. A. elkedraensis, Eth., fil.: Off. Contributions Pal. S. Austr., 
No. 13 (S. Austr. Parl. Papers), 1902, p. 3, pl. ii., figs. 1-4. / 
Obs.—In addition to the comparsions already made in 
numbe: 
morphosis of the. genus. 
(30) Thiele: Proc, Roy. Soc. Vict., xxi. (n.s.), pt. i 1908. 
G)Anon.: Bull. N. Territory, No. 14, 1915, pls. ii. and iii. 
pl dise rae dei Trans. Roy. Soc. Canada. v. (2), 1899, p. 48, 
+ Ly FOU. 
