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EXPLANATION OF PLATE III. 
CRYPTONYMUS VARIOLARIS, Brong. 
Fig. 1. A young specimen. 
Fig. 2. Rolled up specimen. 
Fig. 3. The headandthorax. The segments are slightly bent backwards; 
it shows the sharpened front edge, and notched termination of the pleurae. 
Fig. 4+. <A rolled specimen, nearly full-grown. 
From photographic plates of Fletcher’s plate 32. 
Fig. 5. Head, showing anterior course of facial suture—after Salter. 
Fig. 6. The same: a, side view; a-a, facial suture. 
Fig. 7. Side view—after Fletcher. 
Fig. 8. Shows front part of head and hypostoma—after Fletcher. 
Fig. 9. Under side of the pygidium. 
Fig.10. The pygidium—after Herrman’s illustration, 1711. 
*Pectunculites marmoreus tytlobus tmbricatus.”* 
Fig. 11. The pygidium—after Linné’s figure, 1759. Entomolithus para- 
doxus. 
Fig. 12. Pygidium of 2. mud/ti-segimentatus, Portl.—after Roemer. 
Fig. 13. ENcrINURUS EAGANI, Miller—after Miller’s plate. 
Fig. 14. Hypostoma of /. ob/usus, Ang.; front and side views. 
Fig. 15. ENCRINURUS ORNATUS, Hall & Whitfield; from Clinton, Gr. N. Y.— 
after Hall's plate. 
Fig.16. Hypostoma of £. Leavis, Ang.; front and side views. 
Fig. 17. CyBELE VIGILANS, Hall, Trenton, a-g, N. Y.—after Hall’s plate. 
