Existence of Cambrian Fauna in Victoria. 61 



Dames, then Olenoides typicalis, O. Ma?roiii, O. spinosits, O. levis, 

 O. flagricaudus, O. expansus, O. quadriceps, and O. wahsatcliensis 

 may be referred to the genus Dorypyge." It will be observed 

 that Mr. Walcott here suggests the possibility of Olenoides 

 quadriceps, the presumed ally of our Heathcote fossils, being a 

 Dorypyge. 



Protypus, Walcott,* is another peculiar genus. One of its 

 species, Bathyurus senectus, Billings,! resembles our fossils quite 

 as much as does Olenoides quadriceps, although the type of the 

 genus, P. Hitclicocki, Whitfield,]: does not. In P. senectus we 

 observe the same peculiar glabella, fixed cheeks, and small eye- 

 lobes, but there is neither frontal groove, circumscribed lobes, 

 nor ocular ridges. The pygidium of this species is unknown, 

 but in the type of the genus it is small, and with an entire 

 margin. 



Avalonia, Walcott, with A. nianue/ensis^ as its type, although 

 a Lower Cambrian form, may be referred to in passing from the 

 similarity of its glabella to that of Dinesus, but three pairs of 

 grooves are said to be present, and possibly a long narrow eye- 

 lobe, as well as a peculiar narrow furrow on each fixed cheek 

 between tlie axial grooves and the facial sutures, occupying the 

 position of the ocular ridges. 



Lastly, from Protolenus, Matthew,* the new genus differs 

 much in the same way as from Ptychoparia, except that, as in the 

 latter, the eye-lobes are short and small. 



It may be that I have laid too much stress on the presence of 

 the supplementary circumscribed lobes, but these, taken in con- 

 junction with the form of the glabella and fixed cheeks, small 

 ocular lobes, and the direction of the facial sutures, lead me to 

 regard these Victorian Trilobites as generically distinct, not only 

 from Olenoides, the genus suggested by Mr. Walcott, but also 

 from any others I have been able to study through the works of 

 reference at my command. 



» Bull. U.S. Geol. Survey, ISSO, No. 30, p. 211. 

 t Bull. U.S. Geol. Survey, 1886, No. 30, p. 211, t. 31, f. 2, a-c. 

 X Bull. U.S. Geol. Survey, ISSC, No. 30, p. 211, t. 31, f. 4. 

 § 10th Ann. Report U.S. Geol. Survey, p. 646, t. 95, f . 3, 3a. 

 I, Bull. Nat. Hist. Soc. N. Brunswick, 1892, No. 10, p. 34. 



