96 NOTE ON SOME TRILOBITES NEW TO AUSTRALIA, 



leave any doubt as to the distinction to be drawn, it is the 

 pygidium of Lichas palmata represented in fig. 9, pi. 28 inBarrande. 

 For this reason it would perhaps be wiser to consider the 

 Wellington fossil only as a variety. 



In order to show the differences and affinities above alluded to, 

 I give sketches of the outlines of the species concerned. It will 

 be seen that the sinuses, which are very exaggerated in our variety, 

 are very distinct, if not so deep, in Barrande's above-mentioned 

 figure. 



AciDASPis sp. near A. Dormitzeri, Cord. 



Barrande, Syst. Sil. 1852, p. 728, PL 38, fig. 22. 



(Plate II, figs. 1 and 1 bis.) 



The specimen here recorded is very nearly complete, and is 

 remarkable for its minuteness, being exactly 5 mm. in length, not 

 including the spines of the pygidium. 



It was found at Bowning by Mr. J. Mitchell, together with 

 a great number of other trilobites, &c. 



Although nearly complete, and on that account deserving to be 

 figured, still this specimen leaves doubt as to the ornaments of its 

 frontal margin, as well as of some slight details in the pygidium, and 

 in consequence of its minuteness it leaves also doubts about some 

 other parts. As the figures of other species related to it can be 

 seen in Barrande's work I will only quote them here without 

 commenting at any length. They all have nine segments in the 

 body. 



Acidaspis Leonhardi, Barr. p. 720, pi. 37, fig. 1, length 26 mm. 



Acidaspis Hoernesi, Barr. p. 723, pi. 38, fig. 30, length 20 mm. 



Acidaspiis Geinitziana, Cord. p. 725, pi. 39, fig. 45-49, length 

 about 14 mm. 



Acidaspis Roemeri, Barr. p. 726, pi. 39, fig. 29, length 13 mm. 



Acidaspis mimita, Barr. p. 729, pi. 37, fig. 18, length 15 mm. 



