40 W. M. TATTEE8ALL. 



PLATE IV. 



Euphausia triacantha. 

 Fig. 1. — Male, lateral view x 6. 

 Fig. 2. — Male, dorsal view of anterior end X 20. 

 Fig. 3. — Inner lobe of the endopod of the first pleopods of the male to show copulatory apparatus X 80. ^ 



Euphausia vallentini. 



Fig. 4.- — Outline of antennular peduncle of ' Discovery ' specimen x 20. 



Fig. 5. — Outline of rostrum and basal joint of antennular peduncle of ' Challenger ' specimen x 30. 

 Fig. 6. — Inner lobe of the endopod of the first pleopods of the male in ' Challenger * specimen, to show 

 copulatory apparatus x 80. 



Euphausia sp, juv. 



Fig. 7. — Dorsal view of anterior end of specimen, 10 mm. x 60. 



Fig. 8. — Lateral view of antennular peduncle of the same specimen x 60. 



Fig. 9. — Spine on the third segment of the pleon of the same specimen x 20. 



Euphausia crystallorophias. 

 Fig. 10. — Inner lobe of the endopod of the first pleopods of the male, to show copulatory apparatus x 80. 



PLATE V. 



Hansetiomysis antarctica. 



Fig. 1. — Female, dorsal view x 10. 



Fig. 2. — Enlarged view of anterior end x 23. 



Fig. 3. — Side view of anterior end x 23. 



Fig. 4. — Dorsal view of peculiar antennular organ x 70. 



Fig. 5. — Side view of same x 70. 



Fig. 6.— Mandible x 20. 



Fig. 7. — Mandibular palp x 20. 



Fig. 8. — First maxilla x 20. 



Fig. 9. — Second maxilla x 20. 



Fig. 10. — First thoracic limb x 20. 



Fig. 11. — Second thoracic limb, endopod x 10. 



Fig. 12. — Third thoracic limb, endopod x 10. 



Fig. 13. — Sixth thoracic limb, endopod x 10. 



Fig. 14. — First pleopod x 20. 



Fig. 15. — Second pleopod x 20. 



Fig. 16.— Third pleopod x 20. 



Fig. 17.— Fourth pleopod x 20. 



Fig. 18.— Fifth pleopod X 20. 



Fig. 19. — Telson and uropods x 20. 



PLATE VI. 



Pseudomma ielgicae. 



Fig. 1. — Female, dorsal view x 10. 



Fig. 2.— Mandible X 30. 



Fig. 3. — Mandibular palp x 30. 



Fig. 4.— First maxilla x 30. 



Fig. 5. — Second maxilla x 30. 



Fig. 6. — First thoracic limb, endopod X 13. 



Fig. 7. — Second thoracic limb, endopod x 13. 



Fig. 8.— Telson x 20. 



