506 SILURIAN TRILOBITES OF XEW SOUTH WALES, vi., 



in the first instance for a cephalon occurring again in the " De- 

 spatch Limestone"' at Zeehan,* and the name adopted foranotlier 

 cephalon from near Orange. t 



Genus Homalonotus Koenig, 1820. 

 /Icones Foss. Sectiles, 1820, p. 4). 



Hi.sfori/. — To Mr. T. Harrison, we owe the tirst notice of this 

 genus ill Australia, as Homalononotus del'phinoce'phalas, presum- 

 ably of Green,; and found at Moonee Ponds, near Melbourne. 

 This was subsequently described by Prof. McCoy as H. harj-isoni-^ 

 at the same time he referred to its close relation to the American 

 and European H. delphinocephahis Green, but gives a different 

 locality — "Royal Park, Flemington." It appertains to the 

 Section Trimerus Green. jj 



Mr. C. Jenkins mentioned Homahuohis siS one oi the trilobites 

 occurring in the Hume beds of the Yass River,1Ibut which is not 

 of the characteristic type. Although the figure given is very 

 unsatisfactory, we venture to suggest that it represents a Ptero- 

 pod, of the Bowning beds, and not the remains of a trilobite 

 at all. 



Mr. F. Chapman described and figured a Homalonotus under 

 the name U. vomer,** from Wandong, Victoria. 



In New South Wales, we have never met with a specimen 

 which could with certainty be referred to this genus. One of 

 us (Mitchell) saw the original fossil referred to Homalonotus, and 

 figured by Jenkins (Zoc.ci^.), but cannot confirm the determination. 



Genus Onychopyge H. Woodward, 1880. 

 (Geol. Mag., vii., dec. ii., 1880, pi)?). 

 Under the name of Onychopyge liversidgei, Dr. H. Woodward 



* Etheridge, Tasmania, Kept. 8ecj\ Mines for 1895-6 (1896), p. xiv.. 

 PI. fig. 3. 

 t Etheridge, Rec. Geol. Survey X. S. Wales, viii.. Ft. 4, p. 319, figs.l, "2. 

 X Harrison, Trans. Roy. See. Vict., vii., 1866, p. 17. 

 ^ McCoy, Geol. Survey Vict., Dec. iii., 1876, p. 19, PI. xxiii., tig. 11. 

 1 Green, Men. Tril. N. America, 1832. 

 11 Jenkins, Proe. Linn. Soc. N. S. Wales, iii., Pt. i., 1878, pp. 26, 30 ; 

 ibid., Pt. iii., 1878, p.221, PI. 17, lig.l. 



** Chapman, Proc. Roy. Soc. Vict., xxiv. (N.S.), Pt. ii., 1911, pp.298-9, 

 Pi. iii., tigs.2, 3. 



