PLATE 2 



Fig. 18. Euphausia pacifica Hansen, male, inner and median lobes of copu- 

 latory appendage seen somewhat from side. X 70. The structures seen in the 

 figure, from left to right, are, terminal process, proximal process, lateral process 

 (hooked), median lobe; the short spine is the additional process. 



Fig. 19. Euplumsia pacifica Hansen, male, lateral view of third joint of 

 antennular peduncle. X 35_ 



Fig. 20. Nyctiplianes simplex Hansen, male, first two joints of peduncle of 

 left antennule, from above. X 35. 



Fig. 21. Pseudomma sp., female, telson, from above. X 35. 



Fig. 22. Nematoscelis difftcilis Hansen, male, left copulatory organ. X 70. 

 From left to right the processes shown are, spine-shaped, terminal, proximal, 

 lateral; median lobe, auxiliary lobe. 



Fig. 23. Euphausia pacijica Hansen, male, left copulatory organ, from in 

 front. X 70. Similar to fig. 18. 



Fig. 24. Tliysanoessa gregaria Sars, male, inner lobe of left copulatory 

 organ from in front. X 215. From left to right are shown the spine-shaped, 

 terminal, proximal and lateral processes. 



Fig. 25. Nyctiplianes simplex Hansen, male, inner part of left copulatory 

 organ from in front. X 70. There are shown from left to right the spine- 

 shaped process, inner lobe, lateral process, setiferous lobe; there is no median 

 lobe ^n this species. 



Fig. 26. Euphausia giiba Sars, female, scale at anterior and inner corner 

 of first joint of antennule, from above. X 35. 



Fig. 27. Euphausia pacifica Hansen, female, telson and left uropod from 

 above. X 10. 



Fig. 28. Nyctiphanes simplex Hansen, female, first joint of left antennule 

 from* above. X 35. 



Fig. 29. Eiipha^isia pacifica Hansen, male, first joint of antennule from the 

 side. X 35. 



Fig. 30. Euphausia recurva Hansen, female, first joint of peduncle of right 

 antennule from right side to show the leaflet. X 3u. 



Fig. 31. Thysanoessa gregaria Sars, male, second leg. X 35. 



Fig. 32. Nyctiphanes simplex Hansen, male, right copulatory organ from in 

 front. X 180. Cf. fig. 25. 



Fig. 33. Euphausia gibba Sars, female, third joint of peduncle of right an- 

 tennule and distal part of second, from right side. X 35. 



Fig. 34. Nematoscelis difficilis Hansen, female, distal end of second leg. 

 X 35. 



Fig. 35. Nematoscelis difificilis Hansen, female, second leg. X 10. 



Fig. 36. Euphausia gibba Sars, female, distal end of second joint of pe- 

 duncle of right antennule and proximal part of third. X 35. 



[20] 



