386 
Facial sutures in front of the palpebral lobes almost longt- 
tudinally straight, really very slightly convex, posterior to 
them curving downwards with a concave sweep and sharply 
outwards in the direction of the genal angles. 
Thoracic somites fourteenG9; axis elongately and nar- 
rowly obconical, gently convex; axial grooves wide and open. 
Pleurae arched, angular in the middle line, each strongly 
grooved or furrowed, the proximal half horizontally so, the 
distal obliquely bent. Pygidium small, of two (or perhaps 
three) coalesced segments, and a small terminal appendage; 
those of the pleurae deflected backwards to a slight degree; 
er fi 
glabella furrows and tail segments in Ptychoparia; in the 
former from none to three (the last predominating), and 1n 
the latter from four to seven (again the last typical). In the 
present instance the facial sutures and number of thoracic 
segments are in order, but in the possession of only two pairs 
of glabella furrows, and a decreased series of pygidical seg- 
edent. 
Loc.—Eight miles east of Alroy Downs, Barkly Table- 
land, Northern Territory (Merrotsy). 
Hor.—Cambrian (Etheridge). 
. Genus Repiicuia, Cossmann, 1902. 
Hoeferia, Redlich: Cam. Fauna E. Salt Range (Pal. India, 
n.S., 1., pt. 1, 1899), p. 2. 
Dedlichia, Cossmann: Revue Crit. Pal., 6th Ann., No. 1, 1902, 
or less tucked under the neck 
