254 COPEPODA 



Plate V. 



Fig. i. Undeuchcete superba n. sp. 

 Fig. i a. The abdomen in right view; x 13-5. 



i b. The left lateral corner of last thoracic somite; x 44. 



1 c. Area labialis in ventral view ; x 77. 



Fig. 2. Undeuch&te major Giesbrecht. 

 Fig. 2 a. The labrum in oral view; x 200. 



2 b. The lamina labialis ; x 200. 



2 c. fc?. The endopodite of the right pes V in anterior and interior view; x 77. 



2 d. fd 1 . The Re III of left pes V; x 77. 



Fig. 3. Undeuchcete minor Giesbrecht. 

 Fig. 33. f.. The genital area from beneath; x 77. 



3b. Iff. The pes V in anterior view; x 33. 



30. f c?. The endopodite and the exopodite of the right pes V in anterior and interior view; x 77. 

 3d. f <?. The exopodite of the right pes V ; x 24. 



3 e. f oT. The endopodite of the right pes V; x 24. 

 3f. f d 1 - The Re II III of the left pes V; x 117. 

 3g. fd 1 . The Re II of the left pes V; x 117. 



Fig. 4. Chirudina streetsi Giesbrecht. 

 Fig. 4 a. f The genital area from beneath; x 77. 



4b. f .. The labrum in oral view; x 200. 

 40. f .. The lamina labialis etc.; x 200. 

 4d. f .. The area labialis; x 77. 



4e. tc?. The pes V in posterior view; x 32. 



41. fd 1 . The 2 last segments of the left pes V in anterior and interior view; x 98. 



Fig. 5. Chirudina abyssalis n. sp. 



Fig. 5 a. f$. The abdomen seen from the left; x 24. 



5b. f .. The left mandibula in ant. view; x 44. 



5 c. f.. The left maxilla in post, view; x 44. 



5 d. f?. The marginal teeth of the second basipodite of left pes IV in posterior view; x 117. 



56. f $. The lamina labialis etc.; x 77. 



5 f. f .. The area labialis; x 77. 



Fig. 6. Chirudina pustulifera G. O. Sars. 

 Fig. 6 a. f$. The abdomen in dorsal view; x 24. 



6 b. f J. The first abdominal somite in lateral view; x 24. 



6 c. f$. The genital area seen from beneath; x 77. 



6 d. f.. The labrum in oral view (anterior portion); x 200. 



Fig. 7. Chirudina notacantha G. O. Sars. 

 Fig. 7 a. f<f. The 2 last segments of the exopodite of the left pes V; x 77. 



7 b. fd*. The last segment of the exopodite of the left pes V from another specimen in a some- 



what different position ; x 77. 



