CRUSTACEA MALACOSTRACA. III. 2 6l 



Fig. 4 c. Head and first thoracic segment — most of its legs omitted — of the male, from below ; 

 x8 5 . 



— 4 d. Right antennnla of the head shown in fig. 4 c, from below ; x 195. 



— 4 e. Fifth left leg of the male, from in front; x 125. 



— 4f. Distal part of sixth right leg of the male, from behind; x 125. 



— 4 g. Seventh right leg of the male, from in front; x 125. 



Fig. 5. Cumoechus insignis n. gen., n. sp. 

 Fig. 5 a. Female from Diastylis polaris G. O. Sars (the "Ingolf" Stat. 138), from below; x 12. tr 2 . se- 

 cond pair of thoracic legs ; ab. abdominal area. 

 5 b. Anterior right part of an emptied skin of a female from Diastylis echinata Bate, from below ; 

 x 28. a 1 , antennnlae; I 1 , apparently impaired lamella; I 2 , lamella, possibly the empty skin of 

 the antenna; /3. lamella projecting a little more backwards and partly overlapped, probably 

 first marsupial lamella; tr 1 . first thoracic leg; tr 2 . second thoracic leg. 



— 5 c. Male from Diastylis polaris (the "Ingolf" Stat. 113), from above; x 46. 



— 5 d. Head and first thoracic segment — most of its legs omitted -- of the male from D.echi- 



nata, from below; x 133. 

 5 c Right antennnla of the head shown in fig. 5 d, from below; x 133. Most of the long setae 

 totally omitted (comp. fig. 5 d). 



— 5 f. Third left thoracic leg of the male from D. echinata, from in front; x 120. 



— 5 g. Sixth left leg of the same male, from in front; x 120. 



— 5 b. Seventh left leg of the same male, from in front; x 120. 



5 i. Posterior part of fifth abdominal segment, sixth segment and nropods of the male from D. 



polaris, from above; x 130. The terminal setae on the rami of the nropods nearly or totally 



omitted. 

 5 k. Larva in first stage taken within the skin of a female from D. echinata, from below; x 146. 



Thoracic legs and pleopods omitted on the right half of the figure. 



Fig. 6. Gnathia robusta G. O. Sars. 

 Fig. 6 a. Left mandible of a male from Lat. 70°32' N., from the outer side; x 22. 



— 6 b. Outline of the head, with the proximal joints of left antennnla and antenna, of a female 



from Lat. 6o,°25' N., from above; x 21. 



Fig. 7. Gnathia hirsnta G O. Sars. 

 Fig. 7 a. Head of a male from the "Ingolf Stat. 25, from above; x n. 



— 7 b. Posterior part of abdomen with left uropod of the same male, from above ; x 27. 



Fig. 8. Gnathia abyssorum G O. Sars. 

 Fig. 8 a. Anterior part of the head with mandibles and the proximal joints of the antennnlae of a 

 male from Lat. 64° N., from above ; x 25. 

 8 b. Front part of the lower side of the head of the same male, from below ; x 25. 



