74 EXPLANATION OF PLATE 46'. 
shell, in this position, must have given perfect 
protection to the soft parts of the body enclosed 
within. (Scharf.) 
Fig. 4. Side view of Calymene macrophthalraus, 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 tuberculatus ; a highly ornamented 
species from the Transition lime-stone 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 Crustaccs, PI. IV. Fig. 1.) 
Fig. 9. Ogygia Guettardii, (Brongniart, Hist. Nat. de 
Crustac6s, PI. III. Fig. 1.) 
Fig. 10. Highly ornamented tail of Asaphus gemmu- 
liferus, {Phillips), from the Transition lime-stone 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 
limestone, near Leominster ; in the Oxford Museum. 
Plate 46'. V. I. p. 406. 
Fig. 1. Back of a fossil Scoa'pion of a new genus (Cy- 
clophthalmus) found by Count Sternberg in the 
Coal formation of Bohemia, in a quarry of sandy 
