A 



PLATE 69. 



Fig. 1. 672. 1. LicHAs 'boltoni. (Pag. 311.) 



A large individual of this species, as perfect as usually found of this size. The eye tubercles are crushed, and 

 so much mutilated that their form is not well preserved. The extent of the scabrous outer crust can 

 be inferred from the patches still remaining. 



