389 



Loc. — Dolodrook River, Mount Wellington District, 

 Gippsland, Victoria (Chapman). 



Hor. — "Agnostus zone," Upper Cambrian (Chapman). 



Redlichia(?) minima, Chapman. 



Ptychoparia minima, Chapman: Proc. Roy. Soc. Vict., xxiii. 

 (n.s.), pt,. ii., 1911, p. 318, pi. lviii., figs. 1 and 6(?), pi. lix., 

 fig. 22. 



(?)Proetus(?), sp. nov., Chapman: loc. cit., xxi. (n.s.), 

 pt. i., 1908, p. 269. 



Obs. — I think this form will be more appropriately placed 

 in Redlichia than in Ptychoparia. The distinguishing features 

 are the peculiarly dwarfed and semicircular palpebral lobes, 

 which lend to this cephalon a somewhat remarkable appear- 

 ance, and the "neck-ring showing traces of a slight ridge 

 bearing three small blunt spines directed posteriorly." 



Loc. — Dolodrook River, Mount Wellington District, 

 Gippsland, Victoria. 



Hor. — "Agnostus zone," Upper Cambrian (Chapman). 



Genus Dikelocephalus, D. D. Owen, 1852 

 (Rep.Geol. Sur. Wisconsin, Iowa, and Minnesota, 1852, p. 573). 



Dikelocephalus florentinensis, Eth. fit. 



D. florentinensis, Eth. fiU: Rec. Austr. Mus., v., No. 2, 1904, 

 p. 25, pi. x., fig. 4. 



Obs. — Known only as a pygidium, presenting the typical 

 features of that of the genus. The axis consists of seven seg- 

 ments and a terminal appendage. The flattened side lobes 

 consist of seven or eight pleurae, and there is a wide striated 

 limb. From the ventral margin, opposite to the last but one 

 pleura on each side, projects a' short pygidial spine. 



Loc. — Florentine Valley, Western Tasmania (T. 

 Stephens) . 



Hor. — Cambrian (Etheridge). 



Genus Crepicephalus, D. D. Owen, 1852 < 45) 

 (Rep.Geol. Sur. Wisconsin, Iowa, and Minnesota, 1852, -p. 576). 



Crepicephalus etheridgei, Chapman. 



(? )Cheirurus, Chapman: Proc. Rov. Soc. Vict., xxi. (n.s.), 

 pt. i., 1908, p. 269. 



Crepicephalus etheridqei, Chapman: Ibid, xxiii. (n.s.), pt. ii., 

 1911, p. 319, pi. lviii., fig 8. 



Crepicephalus etheridgei, Walcott : Smithsonian Miscel. 

 Collns., 64, No. 3, 1916, p. 203. 



Obs. — The hitherto existing confusion between the 



genera Dikelocephalus and Crepicephalus has been dispelled 



(45) Redefined, Walcott, 1916. 



