PLATE 10. 



Fig. 1. Nematoscelis microps G. O. Sars. 



Fig. la. Left maxiUa of a female, from below; X 33. All setae omitted. 



Fig. lb. Inner and median lobes of left copulatory organ of an immature male, from behind ; X 83. 



Fig. 2. Nematoscelis gracilis H. J. Hansen. 

 Fig. 2a. Left maxiUa of a female, from below; X 33. All setae omitted. 



Fig. 3. Nematoscelis tenella G. O. Saes. 



Fig. 3a. Left maxillula of a female, from below; X 40. 



Fig. 3b. The distal nearly spiniform seta from the end of the palp of the ma.\illula shown in fig. 

 3a, from below; X 160. 



Fig. 3c. Left maxilla of the same female, from below; X 40. 



Fig. 4. Nematobrachion boopis Calman. 



Fig. 4a. Left maxiUula of a female, from below; X 26. 



Fig. 4b. Left maxilla of the same female, from below; X 26. 



Fig. 4c. The inner, the median and the auxiliary lobes of left copulatory organ, unrolled and seen 

 from behind; X 44. p^ spine-shaped process; p'. terminal process; p\ proximal process; p'. lateral 

 process; p'. additional process. 



Fig. 4d. The inner lobe of the same copulatory organ, seen from the outer side; X 80. The 

 lettering as in fig. 4c. 



Fig. 5. Nematobrachion flexipes (Obtmann). 



Fig. 5a. Anterior part of the body of a male, from above; X 12. The setae on left antennula 

 omitted. 



Fig. 5b. Anterior part of the body of the same male, from the left side; X 10. 



Fig. 5c. Left antennular peduncle of the same male, from the outer side; X 20. 



Fig. 5d. Distal part of second peduncular joint, with the basal portion of third joint of left an- 

 tennula of a female, from above; X 24. 



Fig. 5e. Left maxillula of a female, from below; X 32. 



Fig. 5f. Left maxilla of the same female, from below; X 32. 



Fig. 5g. The abdominal segments of a female, from the left side; X —  



Fig. 5h. Left copulatory organ, unrolled and seen from behind; X 45. 



Fig. 5i. The inner lobe with its thi-ee processes of left copulatory organ of another male, from 

 behind ; X 90. 



Fig. 5k. The inner lobe shown in fig. 5i, seen from the outer side; X 90. The lettering as on fig. 

 4c and fig. 4d. 



Fig. 51. The distal portion of the proximal process of the lobe shown in fig. 5i, from behind ; X 220. 



Fig. 5m. The distal portion of the proximal process of left copulatory organ of a third male, seen 

 as from the end of the inner lobe; X 220. 



Fig. 6. Nematobrachion sexspinosus H. J. Hansen. 

 Fig. 6a. Left maxillula of a male, from below; X 25. pex. pseudexopod. 



