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. 



— I c. Area labialis in ventral view ; x 77. 



Fig. 2. Undeuchcete 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. 



— 2d. fc?. The Re III of left pes V; x 77. 



Fig. 3. Undeuchcete minor Giesbrecht. 



Fig. 3 a. f $. The genital area from beneath; x jj. 



— 3b. f (?. The pes V in anterior view; x 33. 



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



— 3d. i,^. The exopodite of the right pes V; x 24. 



— 3 e. i<^. The endopodite of the right pes V; x 24. 



— 3f. f c?. The Re II— III of the left pes V; x 117. 



— 3 §■• f(?- The Re II of the left pes V; x 117. 



Fig. 4. Chirudina streetsi Giesbrecht 



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



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



— 4c. f^. The lamina labialis etc.; x 200. 



— 4d. f?. The area labialis; x 77. 



— 4e. i(^. The pes V in posterior view; x 32. 



— 4f. fc?. 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. 



— 5 b. 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. 



— 5 e. f$. The lamina labialis etc.; x 77. 



— 5 f. fj. The area labialis; x 77. 



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

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



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



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



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



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

 Fig. 7 a. fc?. 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. 



