374 



shown to be of Cambrian age, was Mr. Otto Tepper.d) We 

 only know the bare fact that a Trilobite was found by him 

 in the Parara Limestone, south of Parara Station. The exact 

 horizon of this fossil was not made very clear, unless it occurred 

 in the "variegated and dark-coloured limestone," or "white 

 and yellow marbles." 



1880. — The next in the field appears to have been our 

 old friend Prof. Ralph Tate/ 2 ) who exhibited at a meeting of 

 the Royal Society of South Australia, held on November 1, 

 1879, "a well-preserved head of a trilobite, which showed no 

 traces of eyes," from the "Lower Silurian" of Ardrossan, 

 Yorke Peninsula. It would be interesting to know if this 

 was one of the specimens afterwards described by Tate in 1892. 



1882. — In this year appeared a reference/ 3 ) probably by 

 Prof. Tate, to the "head of a Trilobite" from Ardrossan, 

 "apparently of the same species as previously found, but of 

 a very much larger size. . . . The glabella is an inch and 

 a quarter long and three-quarters wide, with three pairs of 

 oblique furrows ; its surface is ornamented with numerous 

 close-set granules." It would also be interesting to ascer- 

 tain the whereabouts of this specimen. 



1882. — In this year there appeared the announcement of 

 the occurrence of Cambrian Trilobites in Tasmania by myself, 

 through specimens sent to me by Mr. Thomas Stephens, M.A., 

 formerly Chief Inspector of Schools of that State. These 

 were obtained from a decomposed ferruginous sandstone at 

 Caroline Creek, near Latrobe/ 4 ) and consisted for the most 

 part of fragments beyond determination. But amongst these 

 was a cephalon described as Conocephalites stephensi, and a 

 pygidium as Dikelocephah/s tasmaniensis. With these were 

 some interesting glabellae that I was, and still am, quite 

 unable to satisfactorily refer to any genus within my 

 knowledge. 



This Caroline Creek sandstone was termed by Mr. R. 

 M. Johnston < 5 ) the "Dikelocephalus Group" in his system of 

 classification of Tasmanian rocks. He also stated that the 

 first observer to draw attention to these fossils was Mr. Charles 

 Gould in 1862, the then Government Geologist. By Mr. L. 



(1) Tepper : "Introduction to the Cliffs and Rocks at 

 Ardrossan," Trans. Phil. Soc. Adelaide, 1877-78 (1878), p. 77. 



(2) Tate: Trans. Roy. Soc. S. Austr., iii., 1880, p. xiv. 



(3) Anon. : Trans. Roy. Soc. S. Austr., iv.. 1882, p. 145. 



f4) Etheridge : Papers and Proc. Rov. Soc. Tas., 1882-83 

 <1883), p. 155. 



(5) Johnston: Syst. Ace. Geol. Tas., 1888, p. 33. 



