PLATE 9. 



Fig. 1. Euphausia lamelligera H. J. Hansen. 

 Fig. la. Left copulatory organ, unrolled and seen from behind; X S4. 



Fig. 2. Euphausia gibboides Ortmann. 



Fig. 2a. Anterior part of the body of a male, from above; X 12. The setae on left antennular 

 peduncle omitted. 



Fig. 2b. Anterior part of the body of a male, from the left side; X 10. Setae on the antennula 

 omitted. 



Fig. 2c. Left antennular peduncle of same male, from the outer side; X 21. 



Fig. 2d. Right antennular peduncle, excepting the major part of third joint, of a male, from above; 

 X20. 



Fig. 2e. Left copulatory organ, unrolled and seen from behind; X 34. a. protruding, triangular, 

 acute tubercle from the median lobe; p^. terminal process; p^. proximal process; p'. lateral process. 



Fig. 2f. Distal part of the pro.ximal process of the same organ, from behind; X 95. 



Fig. 2g. Left copulatory organ almost in the natural position of another male, from the iimer 



side; X 34. Lettering as in fig. 2e. 



Fig. 2h. Distal part of the proximal process of the organ shown in fig. 2g, from the inner side; X95. 



Fig. 3. Euphausia mucronata G. O. Sars. 



Fig. 3a. Anterior part of the body of a male, from above; X 13. The setae on left antennula 

 omitted. 



Fig. 3b. Anterior part of the body of a male, from the left side; X ^. Setae on the left an- 

 tennula omitted. The frontal plate too obtuse. 



Fig. 3c. Left antennular peduncle of the specimen shown in fig. 3b, from the outer side; X 23. 



Fig. 3d. Right antennular peduncle of a male, from above; X 22. Most of the setae omitted. 



Fig. 3e. Left copulatory organ, unrolled and seen from behind; X 46. p-. terminal process; p'. 

 proximal process; p*. lateral process; p'. additional process. 



Fig. 3f. Proximal process of the organ shown in fig. 3e, from behind; X 80. 



Fig. 3g. Inner and median lobes of left organ of another male, seen from the inner side; X 57. 

 Lettering as in fig. 3e. 



Fig. 4. Nematoscelis microps G. O. Sars. 



Fig. 4a. Anterior part of an adult male, from above; X 9. 

 Fig. 4b. Anterior part of an immature male, from above; X 9. 

 Fig. 4c. Anterior part of an adult female, from above; X 9. 



Fig. 4d. Anterior part — the majority of the antennular peduncles omitted — of another adult 

 female in order to show the anomalous rostrum, from above; X 9. 



