381 
To the original description may be added that the sur- 
face of each cheek rises into a low blunt tubercle. 
Loe.—Associated with A gnostus elkedraensis. 
Hor.—Cambrian (Etheridge). 
Genus Dinesus, Eth. fil., 1896 
(Proc. Roy. Soc. Vict., viii. (n.s.), 1896, p. 56). 
DriwNESUS 1DA, Eth. fil. 
D. ida, Eth. fil.: Ibid, p. 56, pl. i. 
D. ida, Gregory: Ibid, kv. (n.s.), pt. ii., 1903, p. 155, 
pl. xxvi., figs. 8-10. 
Obs.—On the subject of the fragmentary remains of this 
Trilobite, Mr. C. D. Walcott remarked :— e genus 
Dinesus, Etheridge, jr., appears to be more nearly related 
to Damesella or Dorypygella, Walcott. Its marked charac- 
teristics are: the elongate oval glabella with the small, dis- 
tinct antero-lateral and postero-lateral lobes; the small 
palpebral lobes; and the large pygidium with a spinose 
er. G9 A comparison with Dorypyge and several other 
genera will be found in the original description. 
Prof. J. W. Gregory would combine the pygidia described 
by me as those of D. ida with his N otasaphus fergusoni, but 
too little of both these forms is at present known to define 
their respective limits. 
Loc.—Near Mount Ida, near Heathcote, Victoria. 
Hor.—Cambrian (Etheridge); Ordovician (Gregory) ; 
Cambrian or Lower Silurian (McCoy); Lower Silurian, ‘low 
down'' (T. S. Hall). 
` Genus OrrNELLUs, J. Hall, 1862 
(15th Ann. Rep. N. York State Cab. Nat. Hist., 1862, p. 114). 
OLENELLUS (?) BRowNI, Eth. fil. 
O. browni, Eth. fil.: Off. Contributions Pal. S. Austr., No. 
1 ku Austr. Parl. Papers, 1897, No. 127), 1897, p. 13, pl i., 
g. I 
the cephalic shield. 
0c.— Alexandria Cattle Station, Playford Creek, Barkly 
Tableland (110 miles north-west of Camoweal). . 
Hor.—Cambrian (Etheridge). o 
(36) Walcott: Proc. U.S.A. Nat. Mus., xxix., 1905, p. 35. 
