PLATE 7. 



Fig. 1. Nyctiphanes simplex H. J. Hansen. Young. 



Fig. la. Anteriorpart of a young specimen measuring 7 mm. in lengtli, from above; X 33. The 

 setae of left antennula omitted. 



Fig. lb. Left antennula of the specimen shown in the preceding figure, from the outer side; X 48. 



Fig. 2. Euphausia eximia H. J. Hansen. 



Fig. 2a. Anterior part of the body of an adult male, from above; X 14. The setae on left an- 

 tennula omitted. 



Fig. 2b. Peduncle of left aptennula of an adult male, from the outer side; X 25. 



Fig. 2c. Major part of the peduncle of right antennula of a male, from above; X 25. 



Fig. 2d. Distal part of second joint of the peduncle of right antennula of another specimen, a 

 female, from above; X 27. 



Fig. 2e. Left copulatory organ, unrolled and seen from behind; X 47. p-. terminal process; p'. 

 proximal process; p*. lateral process. 



Fig. 2f. Inner lobe of left copulatory organ of another specimen, from the inner side; X 50. 

 Lettering as in fig. 2e. 



Fig. 2g. Median lobe of left copulatory organ of a large specimen, from the inner side; X 42. p*. 

 lateral process. 



Fig. 3. Euphausia recurva H. J. Hansen. 



Fig. 3a. Anterior part of the body of an adult male, from above; X 23. The setae on left an- 

 tennula omitted. 



Fig. 3b. Left antennular peduncle of an adult male, from the left; X 39. 



Fig. 3c. Major part of the peduncle of right antennula of an adult male, from above; X 36. 



Fig. 3d. Left antennular peduncle of an adult female from Lat. 34° 50' S., long. 25° 30' E., from 

 the outer side; X 25. 



Fig. 3e. Major part of the peduncle of right antennula of the adult female from Lat. 34° 50' S., 

 long. 25° 30' E., from above; X 22. 



Fig. 3f. Left copulatory organ, unrolled and seen from behind; X 77. 



Fig. 3g. Distal part of the terminal process of the organ shown in fig. 3f, from behind; X 140. 



Fig. 3h. Terminal process of left organ of another male, from the inner side; X 130. 



Fig. 3i. Terminal part of the proximal process of the organ shown in fig. 3f, from behind; X 150. 



Fig. 3k. Terminal part of the proximal process of the left organ of another male from Sta. 4576, 

 from behind; X 150. 



Fig. 31. Proximal process of left copulatory organ of a male from Lat. 34° 50' S., long. 25° 30' E., 

 from behind; X 80. 



Fig. 3m. Terminal part of the proximal process .shown in fig. 31, from behind; X 150. 



Fig. 3n. Terminal part of the proximal process of left copulatory organ of another male from Lat. 

 34° 50' S., long. 25° 30' E., from behind; X 150. 



Fig. 4. Euphausia diomedeae Ortmann. 



Fig. 4a. Anterior part of the body of a male from Sta. 4721, having the rostral plate strongly 

 expanded and the rostrum short; from above; X 15. 



Fig. 5. Euphausia pacifica H. J. Hansen. 



Fig. 5a. Anterior part of a slightly more than half-grown specimen, from above; X 19. 

 Fig. 5b. Terminal part of the proximal joint with the basal part of second joint of right antennular 

 peduncle of the specimen shown in fig. 5a, from above; X 50. 



