C2 Proceedings of the Royal Society of Victoria. 



How far the presence of Dinesus alone will tend to prove the 

 occurrence of a Cambrian area in Victoria, future research in the 

 tield must prove, but it lends colour to such a suggestion, and 

 this is supported by the association of the Trilobites with a little 

 Bi'achiopod of a decidedly Cambrian type. This will be referred 

 to again. 



Touching the other Trilobites of Cambrian age that have 

 already been described from Australian rocks, the following 

 remai'ks may be made : — No relation exists between Dinesus and 

 Protoknus Porresti, Foord, from the Cambrian rocks of Kimberley, 

 nor is it directly related to either of the species from the Parara 

 Limestone of Yorke Peninsula, South Australia, viz. : Plycho- 

 paria aiisiralis, Woodw., Dolichoinetopus ? Tatei, AVoodw., Olenelhis 

 2 Priicliardi, Tate,* or Microdiscus subsagittatus, Tate. 



The Tasmanian species from the Caroline Creek series are 

 much more difficult of coniparison from their poor state of preser- 

 vation. Amongst them there seems to be a Ptychoparia or 

 Protolenus {P.? Siephetisi, Eth. fil.), and a possible Dikelocephaliis 

 {P). ? tasinaniciis, Eth. fil.), with several other peculiar forms. Of 

 the latter, little definitely can be said at present, for my paperf 

 was founded on very poor and indefinite material, as evinced 

 by the fact that I did not attempt to name the glabellse (for such 

 is their nature) in question. There is now, however, this amount 

 of interest about them, that in all four the glabella is very much 

 akin to that of Di?iesus, but two possess well-marked furrows ; 

 a third has circumscribed basal lobes and no furrows, and may 

 possibly be allied to Vogdes' Lloydia ; whilst the fourth is 

 furnished with neither lobes nor furrows of any kind. There for 

 the present the comparison must rest. 



The little Brachiopod referred to on a previous page consists 

 of the specimen and its counterpart. It is quadrate in form, and 

 measures only 7 mm. in length. It probably represents the two 

 valves crushed together, with a nearly horizontal hinge line, and 

 showing through the substance of the shell a strong septum, 

 probably that of the dorsal valve. It is covered with very 

 delicate concentric lines, representing the original sculpture of 



*This Trilobite seems to me hardly separable from Dolichometuptts Tatei, Woodw. 

 t Papers and Proc. Roy. Soc. Tas. for 1SS2 [18S3], p. 15C, t. 1, f. 8-11. 



