263 



LIST OF PLATES. 



Plate 





Plate 



I. Pterygotus anglicus and Pterygotus minor. 



XXI. 



II. Pterygotus anglicus. 



XXII. 



III. 



)J 



XXIII. 



IV. 



,, 



XXIV. 



v. 



M 





VI. 



ss 



XXV. 



VII. 



SS 



XXVI. 



VIII. 



ss 



XXVII. 



IX. Recent Crustacea. 



XXVIIL 



X.. Pterygotus 



bilobus. 



XXIX. 



XL 



,, 



XXX. 



XII. 



is 



XXXI. 



XIII. 



ss 





XIV. 



ss 



XXXII. 



XV. 



,, 





XVI. 



and Parka. 



XXXIII. 



XVII. Slimonia acuminata. 



XXXIV. 



XVIII. 



ss 



XXXV. 



XIX. „ 



„ 



XXXVI. 



XX. 



ss 





Stylonurus. 



,, Scoticus. 



■>* »> 



„ Logani and Eurypterus mam- 



matus. 

 Eurypterue Scouleri. 



f , fragments of. 



„ scorpioides. 



„ and Hemiaspis. 



Limuli from the Carboniferous and Silurian 



formations. 

 Development of Agnostus, Sao, and Tri- 



nucleus. Cyclus and Halicyne. 

 Larval stages of Limulus polyphem.m. 

 Anatomy of „ „ 



