510 
SILURIAN TRILOBITES. 
Phacops latigenalis, E. and M. 
Fig. 3. — Cephalic shield slightly distorted; Bowning. Coll. Mitchell. 
Fig. 4. — Portion of another cephalic shield slightly distorted, showing 
glabella furrows and rounded genal angle; Bowning. Coll. 
Mining and Geol. Museum. 
Fig. 5. — Another cephalic shield, showing the deep glabella furrows and 
axial grooves, tumid glabella, wide frontal lobe, and left inter- 
calary nodule; Bowning. Coll. Mitchell. 
Fig. 6. — Front and under view of cephalon, showing (a) rudimentary 
limb, (6) linear ridge and (c) roof of mouth ; Bowning. Coll 
Mitchell. 
Phacops serratus, Foerste. 
Fig. 7. — Portion of the glabella and thorax; Bowning. Coll. Mitchell. 
Fig. 8. — Thorax, side view, showing the bluntly spined median line of the 
segments; Bowning. Coll. Mitchell. 
Phacops Crossleii, E. and M. 
Fig. 9. — Thorax and pygidium; Bowning. Coll. Mitchell. 
Fig. 10. — Cephalic shield, with the furrows, eyes, neck ring, intercalary 
nodules, and rounded genal angles; Bowning. Coll. Mitchell. 
Fig. 11.— Cephalic shield and portion of thorax; Bowning. Coll. Mitchell. 
Phacops mansfieldensis, E. and M. 
Fig. 12. — Portion of a cephalic shield showing a very tumid and subpen- 
tagonal glabella, and a strong intercalary furrow, x 2; Mans- 
field District, Vict. Coll. Sweet. 
Plate xl. 
Hausmannia meridianus, E and M. 
Fig. 1. — Portion of head shield; Kilmore, Vict. Coll. Mining and Geol. 
Museum. 
Phacops latigenalis, E. and M. 
Fig. 2. — Large cephalic shield distorted, showing the tumid glabella and 
coarse granulation; Bowning. Coll. Mitchell. 
Fig. 3. — Portion of a pygidium; Bowning. Coll. Mining and Geol. Museum. 
Fig. 4. — Another pygidium of large dimensions, believed to be that of this 
species; Bowning. Coll. Mitchell. 
Fig. 5. — Portion of head and thorax; Bowning. Coll. Mitchell. 
