PLATE 10. 
Fig. 1. Nematoscelis microps G. O. Sars. 
Fig. la. Left maxilla of a female, from below; X 33. All setae omitted. } 
Fig. 1b. 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 maxilla of a female, from below; X 33. All setae omitted. 
Fig. 3. Nematoscelis tenella G. O. Sars. 
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 maxillula shown in fig. 
3a, from below; X 160. 4g 
Fig. 3c. Left maxilla of the same female, from below; X 40. a 
Fig. 4. Nematobrachion boopis Catman. 
Fig. 4a. Left maxillula 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 se 
from behind; x 44. p!. spine-shaped process; p?. terminal process; p’. aes) process; p‘. late _ 
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 (OrTmMaANy). 
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 three processes of left copulatory organ of another male, f 
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. a 
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; XX 25. pex. pseudexopod. 
