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PLATE VII. 
Phacops rana. 
Page 19. 
See Plates 6, 8, 8 a, and 25. 
1. A specimen of average size, retaining the ci'ust, and showing the general characters of the 
species. 
Hamilton shales. Geneseo, Livingston county. 
2. A somewhat smaller specimen, retaining the parts in juxtaposition. 
Hamilton shales. Eighteen-mile Creek, Erie county. 
3. Anterior view of a large, enrolled individual. 
4. Posterior view of the same. 
Hamilton shales. Canandaigua Lake. 
5. Anterior view of a still larger, enrolled siiecimen. 
Hamilton shales. Darien, Genesee county. 
6. A somewhat imjierfect cephalon of a vei-y large individual. 
Hamilton shales. Near Geneseo, Livingston county. 
7. A sx^ecimen showing two individuals of nearly equal size, lying one ux:)on the other. 
8 The same, with the ujijier individual removed. The emarginate outline of the jiygidium in the 
lower specimen is due to comjuession, ami the sulci reju’esented on the annulations of the left 
jileura do not exist. 
Hamilton shales. Canandaigua Lake. 
9. A large individual partly lestored on the left side. 
Hamilton shales. Canandaigua Lake. 
10. A very large, entire individual. This is the largest entire specimen yet observed. 
11. Profile of the same, showing the glabella flattened from compression in the shales. 
Hamilton shales. Canandaigua Lake. 
