74 EXPLANATION ON PLATE 46'. 



shell, in this position, must have given perfect pro- 

 tection to the soft parts of the body enclosed within. 

 (Scharf.) 



Fig. 4. Side view of Calymene macrophthalmus, rolled 

 up, with its tail closed on its shield. (Curtis.) 



Fig. 5. Front view of another specimen of C. Macroph- 

 thalmus, rolled up like Fig. 4. The Eyes in fossils 

 of this species are usually well preserved, and their 

 facets large. (Curtis.) 



Fig. 6. Asaphus tuberculatis ; a highly ornamented 

 species from the Transition Limestone of Dudley; 

 in the collection of Mr. Johnson, of Bristol. The 

 back alone is composed of flexible plates. (Curtis.) 



Fig. 7. Asaphus De Buchii, from the transition slate of 

 Llandilo ; the tail is surrounded with an inflexible 

 Margin, slightly fluted. (Brongniart.) 



Fig. 8. Restoration of Paradoxoides Tessini, (Brong- 

 niart. Hist. Nat. de Crustaces, PI. IV. Fig. 1.) 



Fig. 9. Oxygia Guettardii, (Brongniart, Hist. Nat. de 

 Crustaces, PI. III. Fig. 1.) 



Fig. 10. Highly ornamented tail of Asaphus gemmulife- 

 rus, {Phillips,) from the Transition Limestone of 

 Dublin, magnified four times. (Curtis.) 



Fig. 11. Tail of Asaphus caudatus, from Carboniferous 

 limestone, at Beadnell, Northumberland ; in the col- 

 lection of the Geol. Soc. of London. (Original.) 



Fig. 12. Tail of Asaphus caudatus, from Transition lime- 

 stone, near Leominster; in the Oxford Museum. 



Plate 46. V. I. p. 306. 



Fig. 1. Back of a fossil Scorpion of a new genus (Cy- 

 clophthalmus) found by Count Sternberg in the 

 Coal formation of Bohemia, in a quarry of sandy 



