320 TBANSACTIONS LIVEEPOOL BIOLOGICAL SOCIETY. 



Moelfre Bay, Anglesea, tidal pools, Aug., '89 (F.A.); 

 Holyhead harbour, 12/9/89 ; Port Erin Harbour. Length 

 11 mm. 



Explanation of Plates. 



Plate XVIII. 



Figs. 1 — 11. Nannonyx spinimanus, n.sp. 

 Fig. 1. Head. 

 Fig. 2. First Maxilla. 

 Fig. 3. Second Maxilla. 

 Fig. 4. Mandible. 

 Fig. 5. Maxillipedes. 

 Fig. 6. First gnathopod of male. 

 Fig. 6a. (on PL XIX.) Dactylus enlarged. 

 Fig. 7. First gnathopod of female. 



Fig. 8. Fourth pleon segment with hind margin of third. 

 Fig. 9. Telson. 



Fig. 10. Side view of telson and third uropods of male. 

 Fig. 11. Second and third uropods of female. 

 Fig. 12. Amphilochus melanops, n.sp., Head. 



Plate XIX. 



Fig. 13. Amphilochus melanops, n. sp., first gnathopod. 

 Fig. 14. ,, second gnathopod. 



Fig. 15. ,, Telson and uropods. 



Fig. 16. Photis pollex, n.sp., first gnathopod. 

 Fig. 17. ,, second gnathopod. 



Fig. 18. ,, third pleon segment. 



Fig. 19. ,, Telson and third uropods. 



Fig. 20. Podocerus falcatus (Mont.), flagellum of upper 



antenna. 

 Fig. 21. Podocerus variegatus, Leach, flagellum of upper 



antenna. 



