BY R. ETHERIDGE, JUNR., AND JOHN MITCHELL. 
509 
In Victoria it is found in the olive mudstones of Broadhurst's 
Creek, near Kilmore, and in the arenaceous beds of Yerring, 
Upper Yarra. 
In Tasmania the species occurs in the Despatch Limestone of 
Zeehan and Heazlewood, JST.W. Tasmania. 
EXPLANATION OF PLATES. 
Plate xxxviii. 
Hausmannia meejdianus, E. and M. 
Fig. L — An almost entire specimen; Bowning. Coll. Mitchell. 
Fig. 2. — Pygidium showing the increased number of segments, absence of 
test on the limb, and the acicular spine; Bowning. Coll. Mining 
and Geol. Museum. 
Fig. 3. — Pygidium of a young individual with a well-developed acicular 
spine; Bowning. Coll. Ibid. 
Fig. 4. — Glabella, portion of fixed cheeks, and one eye. Frontal lobe 
elliptical and strong eye lobes; Bowning. Coll. Mitchell. 
Fig. 5. — Portion of cephalic shield showing the right facial suture and 
form of the eye lobe ; Bowning. Coll. Mitchell. 
Fig. 6. — An eye and palpebral lobe, x 3. Coll. Mitchell. 
Fig. 7. — Free cheek showing course of posterior portion of left facial 
suture, and the genal spine; Bowning. Coll. Mitchell. 
Fig. 8. — Hypostome. Coll. Mitchell. 
Phacops Sweeti, E. and M. 
Fig. 9.— Partially rolled specimen, with thorax and pygidium; Mansfield 
District, Vict. Coll. Sweet. 
Plate xxxix. 
Phacops Sweeti, E. and M. 
Fig. 1.— Cephalic shield somewhat distorted by pressure, but with the left 
eye intact; Mansfield District, Vict. Coll. Sweet. 
Fig. 2.— Decorticated cephalic shield showing the quadrate contour of the 
cephalic shield, small basal lobes, intercalary nodules, neck 
ring, and eyes; Mansfield District, Vict. Coll. Sweet. 
