CRUSTACBA MALACOSTRACA. III. 



Fig. 5. Psfudomesus krevicornis n. gen., n. sp. 



Fig. 5 a. Adult female, from the right side; x ai. Marsupium omitted and the antenna lost excepting 



its short proximal joints. 

 5 b. Body of another adult female, from above; x 16. 



50. Right antennula, from the outer side; x 68. 

 5& Both mandibles, from below; x 68. 



5 e. Left maxilliped, from below ; x 68. 



5 1 First right leg, from the outer side; x 48. a. the two distal spines of fifth joint and the 

 margin between them, more highly magnified. 



5 g. Abdomen and posterior part of last thoracic segment of the female shown in fig. 5 b, from 



below; x 32. 



Fig. 6. Afacrostylis spini/rra G. O. Sars. 



Fig. 6 a. Abdomen and the posterior part of last thoracic segment of a male from Skager Rak ("Hauch" 

 Stat 460), from below ; x 52. 



6 b. Abdomen and the posterior part of last thoracic segment of a female from the same Danish 



locality, from below ; x 52. 



6 c Left postero-lateral subdiaphanous portion of the abdomen of a female, seen from alx>ve and 

 exhibiting the peculiar statocyst consisting of an internal cavity containing a lump of minute 

 crystals; about x 150. 



Plate VII. 



Fig. i. Afacrostylis spiniffra G. O. Sars (continued). 

 Fig. I a. Head with antennula: and the right antenna of a female from the "IngolF Stat 80, from 



above; x 42. 

 i b. Leg of third pair of the same specimen; x 54. 



1 c. Posterior part of the body with sixth right leg and left uropod of the same specimen, from 



above; x 30. 



Fig. 2. Afacrostylis abyssicola n. sp. 

 Fig. 2 a. Female from the "IngolP StaL 37, from above; x 15. 



2 b. Left margin of the head with antenuula and antenna of a female from the "IngolF StaL 37, 



from above; x 57. s. sensory filament 

 2C. Male from the "IngolF StaL 22, from above; x 15. 

 -Ml. Left margin of the head with antennula and antenna of the last-named male, from above; 



x 57. s. sensory filaments. 

 2 e. Third left leg of a female; x 45. 



2 f. Sixth left leg of a female, from in front; x 45. 



2 g. Abdomen and the two posterior segments of a female from the "IngolF StaL 38, from 

 below; x 27. 



2 h. Abdomen and the two posterior thoracic segments of a male from the "Ingoir StaL 22, from 



below; x 35. 



