PLATE XVL 
Dalmanites (Cryph^eus) Boothe 
Page 42. 
See Plate 16 a. 
Fig. 1. An entire individual, of about average adult propoi’tions, showing the short and broad genal 
spines, anodose axis and flattened caudal fimbria. 
Fig. 2. Profile of the same, showing the bi'oad, blunt and laterally flattened genal spines. 
Hamilton gi'oup. Canandaigua Lake. 
Fig. 3. A small cephalon, preserving normal proportions, one of the genal spines being I'estored. 
Hamilton group. Canandaigua Lake. 
Fig. 4. A fi-agmentaiy specimen, showing the usual charactei-s of thorax and pygidium. 
Hamilton group. Canandaigua Lake. 
Dalmanites (Cryph^us) Bootiii, var. Calliteles. 
Page 45. 
See Plate 16 a. 
Fig. 5. A very young individual, drawn in outline and pai-tially restored. This is the earliest stage of 
growth noticed, and an enlargement of the pygidium is given on plate 16 A, fig. 12. • 
Hamilton group. Canandaigua, Ontario county. 
Fig. 6. An individual in a later stage of development, partially i-estored. An enlargement of the pygi¬ 
dium is given on plate 16 a, fig. 13. 
Hamilton group. Canandaigua, Ontario county. 
Fig. 7. An individual in a more advanced stage of growth than the jireceding, partially restored. An 
enlargement of the pygidium is given on plate 16 a, fig. 14. 
Hamilton group. Canandaigua, Ontario county. 
Fig. 8. A still laT-ger individual, slightly incurved, and thus made to appear broadei- than normal. 
Hamilton group. Canandaigua, Ontario county. 
Fig. 9. A slightly larger individual, also somewhat enfolded. This example pi-eserves the axial row of 
nodes, and rounded, but pustulose caudal spines. The genal spines, howevei', are like those of 
the species Boothi rather than those of the variety Calliteles, and the specimen represents a 
form intermediate between noi’mal examples of the species and its variety. 
Hamilton group. Canandaigua Lake. 
Fig. 10. An individual in a later stage of growth, showing the long, slender caudal spines. 
Hamilton group. Canandaigua, Ontario county. 
Fig. 11. An individual, somewhat below the normal adult size, but showing all the characteristics of the 
variety. 
Fig. 12. Profile of the same, showing the long, acute genal spines. 
Hamilton group. Canandaigua, Ontario county. 
Fig. 13. A normal individual, of average size. 
Hamilton group. Canandaigua, Ontario county. 
Fig. 14. The individual represented in fig. 9. Enlarged to two diameters. 
Fig. 15. The same in profile, showing the character of the genal spines. 
Fig. 16. A very lai-ge cephalon. 
Hamilton group. Canandaigua Lake. 
Fig. 17. A thorax and pygidium, of unusually large size. 
Hamilton group. Canandaigua Lake. 
Fig. 18. An enrolled individual, showing the caudal fimbria projecting beyond the frontal bordei-. 
Hamilton group. Near LeRoy, Genesee county. 
Fig. 19. Anterior view of a smaller, partially enrolled individual. • 
Fig. 20. Lateral view of the same. 
