468 CARBONIFEROUS TRILOBITES OF AUSTRALIA, 



association in this way of these heads and tails, and because the 

 great convexity of the pygidia referred to, which would indicate 

 the possession of a very convex cephalon by the species they 

 belong to, and, further, because no other head-shields reasonably 

 preserved occur in association with these remains, with whicli 

 they appear to have near relationship, I liave determined to place 

 them with Mr. Etheridge's }\ tvoodwardi, and, for this reason, 

 the species is redescribed hereunder. 



Complete form not yet certainly known, but it may be assumed 

 to have been oblong-ovate. 



Cephalon sub-semicircular, highly inflated, surface granulated 

 throughout. Glabella subquadrate, wide and mildly rounded in 

 front, strongly convex, highest between the mesial lobes, sloping 

 strongly anteriorly, and overhanging the furrow of the limb in 

 front; three pairs of glabellar furrows present, the anterior and 

 mesial pairs rather wide, shallow and straight; basal pair wide 

 and deep; anterior and mesial lobes narrow; basal pair large, 

 subfusiform, much lower than the glabellar superficial centre, 

 overhanging the axial and neck-furrows latero-posteriorly; limb 

 very large, border strongly thickened and upturned, furrow wide 

 and deep; neck-furrow wide and deep; neck-ring strong, convex, 

 bases strongly curving anteriorly under the glabellar basal lobes; 

 supplementary lobes present, though tjot conspicuous in the most 

 typical specimen. Facial sutures anteriorly directed outwards 

 at an angle of about 25°. Fixed cheeks would appear to have 

 been of moderate size, and posteriorly strongly inflated. Free 

 cheeks fairly large, strongly and thickly granulated, especially 

 on the part between the lateral and ocular furrows; this part, 

 too, is high, and rather acutely angulate postero-laterally, flat 

 superficially, laterally and posteriorly steeply falling into the 

 lateral and posterior furrows, which are wide and deep; border 

 much thickened and upturned, striated, posterior border (exten- 

 sion of the neck-ring) strong, genal angles apparently blunt; 

 eyes of moderate size, apparently crescentic and faceted, some- 

 what sunk into the ocular furrow. 



I'horax : for certain not known, but the following is the de- 

 scription of one attached to a pygidium identical with a number 



