PLATE XV. 



Fig. i. P seudeuphausia latifrons G. O. Sars. 



Fig. ia. Anterior part of a male from Stat. 138; X 33. 



Fig. \b. Peduncle of right antennula of the same male; x 55. 



Fi°\ ie. Copulatory organ of first left male pleopod, unrolled and seen from behind; X 130. The lettering 



as in fig. ia on PI. XII. 

 Fig. ld. Copulatory organ of another male, from the inner side ; X 75. c. coupling hooks. 



Fig. 2. Nematoscelis microps G. O. Sars. 



Fig. 2a. Anterior part of a male from Stat. 143; x 10. 



Fig. 2b. Anterior part of another male from the same locality; X 10. 



Fig. 2c. Anterior part of a femalé from Stat. 203; X 10. 



Fig. 2d. Distal part of first thoracic leg of a female; x 28. 



Fig. 2e. Portion of the distal half of the longest terminal spine of the part shown in the preceding figure, 



from the side; X 182. 

 Fig. 2f. Copulatory organ of first left male pleopod, unrolled and seen from behind ; X 84. The lettering 



as in fig. 3« on PI. XII. 

 Fig. 2g. Inner and median lobes of left copulatory organ of another male, from behind ; x 84. 

 Fig. 2/1. Inner and median lobes of left copulatory organ of the male shown in fig. 2a, from behind; x 84. 

 Fig. 2i. Anterior part of a young specimen measuring 6.7 mm. in length, from the side; X 20. 

 Fig. 2k. Anterior part of a still smaller specimen measuring 4.7 mm.; X 20. 



Fig. 3. Nematoscelis gracilis n. sp. 



Fig. 3«. Anterior part of a male from Stat. 203; X 15. 



Fig. 3^. Anterior part of a female from Stat. 203; X 15. 



Fig. 3c. Distal part of first thoracic leg of a female; x 42. 



Fig. 2>d- Copulatory organ of first left male pleopod, unrolled and seen from behind; X 84. 



Fig. ie. Distal part of the proximal process of the same organ, from behind; X 250. 



Fig. if. Distal part of the lateral process of the same organ, from behind; X 250. 



Fig. -$g. Distal part of the lateral process of another organ, from behind; x 250. 



Fig. 4. Nematoscelis tenella G. O. Sars. 



Fig. 4a. Anterior part of an adult male from Stat. 141, from the side; x 12. 



Fig. 4Ó. Anterior part of an adult female from Stat. 118, from above ; X 11. 



Fig. 4c. Distal part of first thoracic leg of a male; x 38. 



Fig. 4cl. Portion of the distal half of the longest terminal spine of the part shown in the preceding figure, 



from the side; x 178. 



Fig. 4e. Copulatory organ of first left male pleopod, unrolled and seen from behind ; X 67. 



Fig. 4/. Inner and median lobes vvith their processes of the same organ, from behind; X 129. 



Fig. 4g. Distal part of the proximal process of another organ, from behind; X 320. 



Fig. 4/1. Distal part of the lateral process of the organ shown in fig. 4e, from behind; X 320. 



Fig. 4/. Anterior part of a young specimen measuring 10.5 mm. in length, from above; X '15. 



Fig. 4/fr. Anterior part of the same young specimen, from the side; x 12. 



Fig. 4/. Anterior part of a still younger specimen, 7.2 mm. long, from above; X 22. 



Fig. 4111. Anterior part of the same very young specimen, from the side; X 12. 



