CRUSTACEA MALACOSTRACA. III. 237 



Fig. 3 c. Right portion of the head and of first thoracic segment of a subadult female from the "Ingolf" 

 Stat. 44, from above; x 33. 



— 3d. Head and major part of first thoracic segment of a male from the "Ingolf" vStat. 81, from 



above; x 33. 



— 3 c Right portion of the head of a male from the "Ingolf Stat. 44, from above; x 23. 



— 3 f. Major part of first left leg of a male, from behind; x 35. 



— 3 g. Median lamella of the abdominal operculum of a male from the "Ingolf" Stat. 44, from be- 



low; x 45. 

 3 h. Distal parts of the pleopods shown in fig. 3 g, from below and more highly magnified. 



Fig. 4. Munna Kroycri Goodsir. 

 Fig. 4 a. Median lamella of the abdominal operculum of a male from Norway, from below ; x 80. 



— 4 b. Distal parts of the pleopods shown in fig. 4 a, from below and more highly magnified. 



Fig. 5. Munna Fabricii Kroyer. 

 Fig. 5 a. Right uropod of a male from Godthaab (West Greenland), from below; x 168. 



— 5b. Left uropod of another male from the same locality, from above; x 168. 



— 5c. Median lamella of the abdominal operculum of a male from Godthaab, from below; x 55. 



— 5 d. Distal parts of the pleopods shown in fig. 5 c, more highly magnified. 



Fig. 6. Munna minuta H. J. H. 

 Fig. 6 a. Median plates of the abdominal operculum of a male from Davis Strait, Lat. 64°52' N., from 

 below; x 80. 



Fig. 7. Munna acanthi/era n. sp. 

 Fig. 7 a. Anterior part of the body of a female without marsupium from the "Ingolf Stat. 35, from 

 above; x 22. 



— 7 b. Posterior part of the body of the same female, from above; x 22. 



— 7 c. Anterior margin of the head of another female from the same station, from above; x 44. 



— 7 d. Posterior part of the body of another female without marsupium from the same station, 



from the left side; x 24. 



— 7 e. Anterior part of the body of a male from the same station, from above; x 22. Right an- 



tennula, excepting its basal joint, and right antenna omitted. 



— 7 f. Antennula of a male from the same station, from above; x 45. 



— 7 g. Median lamella of the abdominal operculum of a male from the same station, from below ; x 45. 



— 7 h. Distal parts of the pleopods shown in fig. 7 g, more highly magnified. 



Fig. 8. Pleurogonium inerme G. 0. Sars. 

 Fig. 8 a. Left portion of all thoracic segments of a not quite full-grown female from Jan Mayen, from 

 above; x 27. 



— 8 b. First right thoracic leg of a male from Jan Mayen, from behind ; x 91. 



