76 D. J. SCOURFIELD ON AN ALOIS A AND A PLEUROXUS NEW TO BRITAIN. 



Fig. 5. Pleuroxus denticulatus Birge, ?, x 100. 

 ,, 6. ,, „ teeth at posterior ventral angles of 



valves, x 400. 

 „ 7. „ ,, teeth at bases of plumose fringing 



hairs on anterior ventral margin 



of shell x 800. 

 ,, 8. ,, „ first antenna, x 500, 



,, 9. ,, ,, post-abdomen, x 310. 



,, 10. ,, „ dorsal edge of post-abdomen, x 700. 



Journ. Quekett Microscopical Club, Ser. 2, Vol. X., No. 60, April 1907. 



