Victorian Fossils, Part XII. 319 



precedinij: P. thiehi. The glabella, liowever, is shorter, with 

 only three lateral furrows ; whilst the palpebral lobes are also 

 shorter and rounder. The form of the g;labella and the well 

 developed palpebral and visula areas show its alliance with 

 Ftyrhoparia. Two specimens occur in the present series. The 

 characters of the pyg-idium, if it be referable to this species, 

 are distinct from that of P. tliiehi, for the axis is slender and 

 the border is definitely striated. This latter feature is also 

 well seen in pygidia of the allied genera Anomocare and 

 Bafhi/urlscus. 



Affinities. — The deep and depressed border of the glabella, 

 and the spinous processes of the neck-ring in P. minima ma}', 

 with advantage, be compared with Ptyrhoparia frilincdfd, 

 Emmons sp.i The latter species occurs in the Middle Cam- 

 brian of North America, but generally similar forms range 

 throughout the system. Another interesting trilobite, showing 

 certain characters in common with our species, is the Conn- 

 cejjhalites suhquadratus of Dames,'-^ from the Upper Cambrian 

 of Ta-ling (Liau-tung), China. 



Horizon. — Upper Cambrian. Agnostus Zone. Dolodrook 

 River. 



Cenus CrepirepliaJiis. Owen, 1852. 



Crepicephalus etheridgei, sp. nov.^ 



(PL LVIII., Fig. 8, (?) Fig. \; PI. LTX., Figs, 20, 21) (?). 



Desrripfion. — Cranidium small, semicircular, inflated. (rla- 

 bella subspherical or elongately globose, highest along the 

 median longitudinal line ; surface faintly marked with three 

 pairs of furrows which curve forAvards and outwards from 

 either side of the middle line : frontal border depressed, sulcated 

 and with an almost straight or slightly curved margin ; neck- 



1 Atops trilineatus, Emmons. " Taeonic System," 1844, p. 20. fiff. 1 ; pi. ii., fiy;. a. 

 Ptychoparia trilineata, C. D. Wallcott, " Second Contiibutioti to the Studies on the Cam- 

 brian Faunas of N. Anierica." Bull. U. S. Geol. Surv., No. 30, 1880, p. 203, pi. xxvii., flj,'s. 

 1, la-c. 



2 In Richthofen's "China," vol. iv., p. 12, pi. i., fij;s. 9, 11. 



3 Named in honour of .Mr. R. Ktheridjfe, Curator of the Australian .Museum who has 

 contributed so much to our kTio\vl«l"e of .\ustraliaii Caml)riaii faunas. 



