PLATE XV. 



Fig. I. Fseitdeuphaiisia latifrons G. O. Sars. 



Fig. \a. Anterior part of a male from Stat. 138; X H- 



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



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



as in fig. 3rt on PL XII. 

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



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



as in fig. la on PI. XII. 



Ficr '' c. 



Fig. 2h. 

 Fig. 21. 

 Fig. 2k. 



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

 Inner and median lobes of left copulatory organ of the male shown in fig. 2a, from behind 

 Anterior part of a young specimen measuring ^.'j mm. in length, from the side; X 20. 

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



X 84. 



Fig. 3. Nematoscelis gracilis n. sp. 



Fig. 31-7. Anterior part of a male from Stat. 203; X 15. 



Fig. 3/7. Anterior part of a female from Stat. 203; X 15. 



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



Fig. id. Copulatory organ of first left male pleopod, unrolled and seen from behind; X 84. 



Fig. 3^. 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. ig. Distal part of the lateral process of another organ, from behind; x 250. 



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



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



Anterior part of an adult female from Stat. 118, from above; x 11. 



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



Portion of the distal half of the longest terminal spine of the part shown in the preceding figure, 



from the side; x 178. 

 Copulatory organ of first left male pleopod, unrolled and seen from behind ; X ^f. 

 Inner and median lobes with their processes of the same organ, from behind; X 129. 

 Distal part of the pro.ximal process of another organ, from behind; X 320. 

 Distal part of the lateral process of the organ shown in fig. 4^, from behind; X 320. 

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

 Anterior part of the same young specimen, from the side; x 12. 

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

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



