PLATE XI. 



1. ArchcROcarahus Boiccrbaiiku ip. l^). In'om a sj)ccmieii in tlir Uritish iMuscuiu. 



2. The same, showing the al)douieu, and portions of the first four legs. lu Mr. 



Bowerbank's collection . 



3. Thorax of the same. In the British Museum. 



4. 5. Claws of the same. From Mr. Bowerbank's collection. 



The S]«'cimens are all from Slieppey. 



