PLATE 5. 
Fig. 1. Thysanopoda pectinata OrTMANN. 
Fig. la. Anterior part of a female from Sta. 4719, from above; X 13. Thesetae on right antennula 
omitted. : 
Fig. 1b. Anterior part of a female from Sta. 4705, from the left side; X 12. 
Fig. 1c. Front end of the carapace of a male from Sta. 4705, from above; X 12. 
Fig. 1d. Left maxillula of a male, from below; X 24. 4. fourth joint or palp, very small and seen 
through the large pseudexopod. 
Fig. le. Left copulatory organ, unrolled and seen from behind; X 34. p!. spine-shaped process; 
p?. terminal process; p*. proximal process; p‘. lateral process; p®. additional process; p*. secondary 
additional process. 
Fig. 1f. Distal part of the inner and median lobes of left copulatory organ, seen from the inner 
side and showing all processes excepting the secondary additional process; X 48. 
Fig. 1g. Distal part of the proximal process, seen from the outer side; X 50. 
Fig. lh. The additional process, seen from in front; XX 90. 
Fig. 1i. Inner lobe with its three processes of left copulatory organ of a small male from Sta. 4705, 
from behind; X 68. 
Fig. 1k. Anterior part of a young specimen, 11 mm. long, from Sta. 4730, from above; X 23. 
Setae omitted. 
Fig. 11. Anterior part of the young specimen shown in the preceding figure and seen from the 
right; xX 14. 
Fig. lm. Right antennula of the same young specimen, from the right side; X 25. 
Fig. 2. Thysanopoda orientalis H. J. HAnsEn. 
Fig. 2a. Left maxillula of an adult male, from below; X 32. The palp is seen through the large 
pseudexopod. 
Fig. 2b. Outline of left maxillula of another male, from below; X 20. The figure is given for 
comparison with fig. 2a in order to show difference in the palp. 
Fig. 2c. Left maxilla of an adult male, from below; X 20. 1. first joint; 2. second joint; 1?. lobe 
from second joint; 3. third joint; }'. lobe of third joint; ex. exopod. 
Fig. 2d. Left copulatory organ, unrolled and seen from behind; X 33. p*. lateral process; p'. 
additional process; p®. secondary additional process. 
Fig. 2e. Terminal process of the same organ, from in front; X 53. 
Fig. 2f. Distal part of the proximal process of the same organ, from behind; X 86. 
Fig. 2g. Distal part of the proximal process of the same organ, from in front; XX 127. 
Fig. 2h. Distal part of the proximal process of left organ of another specimen, from behind; X 86. 
Fig. 2i. Distal half of the median lobe of the organ shown in fig. 2d, seen from the inner side; X 50. 
The lettering as in fig. 2d. 
