x LIST OF PLATES 
To face 
page 
PLATE 11. THE DERMAL ARMOUR OF CROCODILUS HASTINGSIA. 
Figs. I-g . i « & ‘ : . 169 
PLATE 12. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-17—Lvettopterus—Pterygotus bilobus—P. perornatus, var. plica- 
tesstmus-—Eurypterus lanceolatus . 202 
PLATE 13. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-13—Pterygotus acuminatus  . : : 202, 
PLATE 14. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-6—Prerygotus anglicus 4-8 ‘ x ‘ 2 202 
PLATE 15. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-6—Péerygotus anglicus—Thoracic and Abdominal Segments 202 
PLATE 16. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-6—Pterygotus anglicus—Posterior Body Segments ‘ 202 
PLATE 17. THE ANATOMY AND AFFINITIES OF THE GENUs PTERYGOTUS. 
Figs. 1-6—Péervgolus anglicus—Ectognaths and Antenne . . 202 
PLATE 18. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-7—Péeryvgotus anglicus—Ectognaths and Endognaths . ie 202 
PLATE 19. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-9—Pterygotus gigas—Carapace and Body Rings . 3 202 
PLATE 20. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-18—Pvrerygotus gigas—Appendages, &c. . ge are ah Sige 2a! BOD 
PLATE 21. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-11—Prerygotus punctatus—Body Segments, &c. ‘ - 202 
PLATE 22. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-15—Pverygotus punctatus—Appendages 202 
PLATE 23. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-21—Figs. 22-46—Pverygotus ludensis, P. gigas, P. problematicus, 
P. punctatus, P. Banksit, P. stylops. . . . 3 wv Oe 
PLATE 24. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-17—Prerygotus acumtnatus, P. punctatus, P. arcuatus. Carapage 
and Antenne of a new Crustacean 2 202 
PLATE 25. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-18—Prerygotus ludensts, P. problematicus : 202 
PLATE 26. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-6—Prerygotus acumtnatus, P. perornatus, P. ludensis, P. arcua- 
zus—Restoration of Prerygotus bilobus  . : ; 202 
PLATE 27. THE ANATOMY AND AFFINITIES OF THE GENUS PTERYGOTUS. 
Figs. 1-19—Anatomical Illustrations from recent Crustacea . «a 202 
PLATE 28. THE DEVELOPMENT OF SOME PARTS OF THE SKELETON OF 
FISHES, 
Figs. I-4 ‘ : oe ae a ky BSE 
