PLATE IV 
Fig. 1. Proetus chambliensis. A, B, C, complete individuals, the latter par- 
tially exposed, exhibiting the genal spines; the glabella is best preserved in A. 
The neck ring is best seen in D, and E. The pygidium is well shown by E, F, G, 
and H. The curvature of the extremities of the pleural segments best seen in G. 
Rock fragment collected at Chambly village, a short distance south of the dam 
across the Richelieu River, in the province of Quebec. Preserved in the Victoria 
Memorial Museum, Ottawa, Canada, No. 8435. Figure magnified two diameters. 
Fig. 2. C. Rafinesquini nasuta, Conrad. Cast of interior of pedicel valve, from 
large rock containing Trinucleus, Modiolopsis modiolaris, and numerous other 
Lorraine fossils, a short distance west of the railroad bridge at Pulaski, New York. 
Fig. 3. Archinacella pulaskiensis. C, View from above. D, a lateral view. 
From the Trinucleus horizon several hundred yards west of the railroad bridge, at 
Pulaski, New York. 
Fig. 4. Pasceolus globosus, Billings. Specimen showing concave plates with 
radiating grooves. A short distance below the Fulton layer, in the Point Pleasant 
limestone section, at the quarry west of Point Pleasant, Ohio. 
Fig. 5. Taeniaster meafordensis. A, B, two specimens showing the oral side. 
C, specimen showing the aboral side; only the lower arm in the left side, as figured, 
is well exposed. 
Fig. 6. Taeniaster meafordensis. D, oral side, poorly preserved. E, F, aboral 
side, with the surface of one of the arms, in F, well exposed. 
Fig. 7. Taeniaster meafordensis. G, a specimen with the arms bent back. 
Specimens in this attitude were common in the rocks layer from which the various 
fragments here illustrated were obtained. Hundreds of individuals were crowded 
closely together. Richmond group, along Workman creek, three miles southeast 
of Meaford, Ontario, Canada. 
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