CRUSTACEA OP NEW ZEALAND. 281 



EXPLANATION OF THE PLATES. 



Plate XVI. 



Phreatoicus assimilis. 



Fig. 1. Side view of the whole uuiiual, a female, x 12. 



2. Upper antenna. 



3. Lower antenna. 



4. Upper lip. x 58. 



5. Outer convex surface of mandible with palp attached. 



6. Left mandible. 



7. Lower lip. x 58. 



8. First maxilla. x 58. 



9. Second maxilla, x 58. 

 10& 11. Maxillipedes. 



Plate XVII. 



Phreatoicus assimilis. 



Fig. 1-3. First appendage of the peraeon. 

 ■i. Second ditto. 



5. Propodos produced along the base of dactylos. 



6. Fourth appendage of the perceon. 



7. The same, distal extremity enlarged. 



8-9. Fifth and sixth appendages of the peraeon. 



10. First pleopod. x 19. 



11. Second pleopod, of male, x 19. 



12. Third pleopod. x 19. 



13. Side view of end of pleon, showing the telson una uropoda. x 19. 



Plate XVIII. 



Phreatoicus typicus. 



Fig. 1. Side view of the whole animal, a female, x 6. 



2. The antenna;, side view, showing the upper antenna and the peduncle of the lower 



antenna, x 35. 



3. E.Ktremity of the left mandible, much compressed. X 180. 

 •i. Lower lip. X 58. 



5. First maxilla. X 58. 



6. Second maxilla. X 58. 



7. Leg of the first pair, of female. X 19. 



8. Extremity of the same. X 45. 



9. Leg of the second pair, x 19. 



10. Leg of the sixth pair. X 19. 



11. Lower margins of the first five segments of plcou. X 19. 



12. Side view of end of the pleon, showing tlic telsou and uropoda. x 19. 



