PLATE 8. 



Fig. 1. Euphausia brevis H. J. Hansen. 



Fig. la. Anterior part of the body of a male, from above; X 32. 



Fig. lb. Left antennular peduncle of a male, from the outer side; X 47. 



Fig. Ic. Major part of right antennular peduncle of a male, showing the terminal part of first 

 joint with its lobe, and the whole second joint, from above; X 47. 



Fig. Id. Left copulatory organ, unrolled and seen from behind; X 87. 



Fig. le. Proximal process of the organ shown in the preceding figure, from behind; X 150. 



Fig. If. Inner lobe of left copulatory organ of another male, seen from the inner side; X 141. 



Fig. Ig. Distal part of the terminal process of the lobe exhibited in fig. If, seen from the inner 

 Bide and a little from in front; X 141. 



Fig. 2. Euphausia gibba G. O. Sars. 



Fig. 2a. Left antennular peduncle of a male, from tlie outer side; X 25. 



Fig. 2b. Left copulatory organ, unrolled and seen from behind; X 52. p^. terminal process; p'. 

 proximal process; p^ lateral process; hn. median lobe, with its finger-like distal part. 



Fig. 3. Euphausia distinguenda H. J. Hansen. 



Fig. 3a. Anterior part of the body of a male, from above; X 20. The setae on left antennula 

 omitted. 



Fig. 3b. Anterior part of the body of a male, from the left side; X 17. 



Fig. 3c. Left autenimlar peduncle of the same male, from the left side; X 35. p. ear-hke process 

 at the distal outer upper angle of second joint. 



Fig. 3d. Major part of right antennular peduncle of a male, showing the distal part of first joint 

 and the whole second joint, from above; X 35. p. ear-like process at the distal outer upper angle of 

 second joint. 



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



Fig. 3f. Proximal process, p'., and median lobe with the lateral process; p'., of left copulatory 

 organ of another specimen, seen from the inner side ; X 90. 



Fig. 4. Euphausia lamelligera II. J. Hansen. 



Fig. 4a. Anterior part of the body of a male, from above; X 23. 1. movable lamella from second 

 joint. 



Fig. 4b. Anterior part of the body of a male, from the left side; X IS. 



Fig. 4c. Left antennular peduncle of a male, from the outer side; X 38. 



Fig. 4d. Right antennular peduncle of a male, from above; X 36. 1. movable lamella from the 

 end of second joint. The setae omitted. 



Fig. 4e. Inner and median lobes of left copulatory organ, seen from the inner side; X 84. p'. 

 terminal process; p^ proximal process; p"". lateral process. 



