84 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



terior foot-jaw, X 380. 7. Foot of first pair 

 of swimming feet, X 170 8. Foot of fourth 

 pair, X 170. 9. Foot of fifth pair, X 380. 10. 

 Foot of fifth pair, male, X 380. 11. Abdomen 

 and caudal stylets, X 80. 

 Canthocamptus palustris, Brady. 



Fig. 12. Female seen from the side, X 50. 13. Anten- 

 nule, X '200. 14. Antennule, male, X 152. 

 15. Antenna, X 253. 16. Mandible, X 300. 

 17. Posterior foot-jaw, X 380. 18. Foot of 

 first pair of swimming feet, X 170. 19. Foot of 

 fourth pair, X 170. 20. Foot of fifth pair, 

 X 253. 21. Foot of fifth pair, male, X 253. 

 22. Appendage to the first abdominal segment, 

 male, X 253. 23. Abdomen and caudal stylets, 

 X 80. 

 Tctragoniceps trispinosus, n. sp. 



Fig. 24. Posterior foot-jaw, X 300. 25. Foot of fifth 

 pair, X 380. 



Plate III. 



Tctragoniceps trispinosus, n. sp. 



Fig. 1. Female seen from above, X 80. 2. Antennule, 

 X 170. 3. Antenna, X 253. 4. Foot of first 

 pair of swimming feet, X 253. 5. Foot of 

 fourth pair, X 253. 6. Abdomen and caudal 

 stylets, X 253. 

 Pseudolaoplwnte aculcata, n. gen. and n. sp. 



Fig. 7. Female seen from above, X 106. 8. Antennule, 

 X 17<>. 9. Antennule, male, x 170. 10. An- 

 tenna, X 125. 11. Mandible, X 253. 12. 

 Maxilla, X 253. 13. Anterior foot-jaw, x 253. 

 14. Posterior foot-jaw, X 253. 15. Foot of 

 first pair of swimming feet, X 253. 10. Foot 



