BRITISH FOSSILS. 



PLATE XII. FIG. 47. 



P. STILOPS. 



P. parvulus, capite (parte antica solum asservata) 9 lineas lato, convexo, 

 quadrato, fronte {fraclo) producto ? lateribus rectis ; oculis ad angulos 

 externos fixis, magnis, turgidis. 



This remarkable small carapace, the anterior part of which only 

 is preserved, has occurred to the assiduous search of Mr. R. Banks 

 of Kington. 



Only the anterior part is preserved, and even of this the frontal 

 portion between the eyes is broken off; it was perhaps less promi- 

 nent than the dotted lines indicate. The forward position and round 

 form of the great eyes very much assimilate the species to P. acu- 

 minatus, and without doubt it belongs to the same section, or the 

 true Pterygotus. 



The eyes are remarkably prominent and turgid, a slightly raised 

 fold of the carapace encircling them. A small tubercle, like that on 

 the same part in P. gigas, Plate XII., occurs on the median line of 

 the head, and rather nearer to each eye than their distance from one 

 another. As only a single broken specimen has occurred it is useless 

 to describe it further. There can be no doubt of the distinctness of 

 the species. 



Locality. Kington. Coll. Mr. R. Banks, of Kington. 



