EXPLANATIOX OF THE PLATES 



PLATE I 



Fig. i. — Euphausia longirostris n. sp. 



Fig. i a. — Céphalothorax with eye and proximal part of antennula and antenna, from the 

 left ; X ii/2. 

 » i b. — Left antennula of the same spécimen, from the outer side ; X 17/2. 

 » if. — Major part of the peduncle of right antennula, from above ; X il. 



Fig. 2. — Thysano'êssa macrura G. O. S. 



• Front part of céphalothorax with appendages of a voung spécimen, measuring 

 8 mm., from the left ; X 21. 



■ Same, from above ; X 21. 



• Left maxilliped of the same spécimen ; X 3o. 

 Left first thoracic leg of the same spécimen ; X 3o. 

 Posterior part of abdomen of the same spécimen ; X 12. 

 Distal part of telson of the same spécimen ; X 5o. 



• Front part of céphalothorax with appendages of a spécimen in the last larval stage, 



measuring 5.7 mm., from the left ; X 21. 

 » 2 h. — Distal part of telson of the spécimen shown in fig. 2 g, from above ; X 5o. — To the 

 right of the figure is shown separately the hook from the base of the inner margin 

 of the broad movable spine. 



Fig. 3. — Last laix<al stage of Euphausia crystallorophias Holt & Tatt. 



Fig. 3 a. — Head with appendages of a spécimen measuring 10 mm. in length, from above ; 

 X21. 

 » 3 b. — Posterior part of abdomen of the same spécimen, from above ; X 16. 

 » 3 c. — End of telson of the same spécimen, from above; X 46. 



Fig. 4. — Four larval stages of Euphausia superba Dana 

 Figs. 4*7 — 4 c. — Stage A ; length 40 mm. 



Fig. ;\a. — Head with eyes and antennulse, from above ; X 19. 

 » 4 b. — Left maxilliped, from below ; X 47. 

 » 4 c. — Left first leg, from behind ; X 47. 



» 4 d.. — Two last abdominal segments and right uropod, from above ; X 20. 

 » 4 c. — Posterior part of telson, from above ; X 40. 



