PLATE 1. 



Fig. 1. Chalaraspis alata Willemoes-Sdhm. 



Anterior part of the body of an adult male from Sta. 4719, from above; X v- 

 Anterior part of the body of the same male, from the left side; X ^. o. eye. 

 Right antcnnal squama of an immature specimen from Sta. 4672, from above; X 13. 

 Left mandible of the same immature specimen, from below; X V- 



Left maxillula of the same immature specimen, from below; X -r- 1- first joint; 1'. 

 lobe from first joint; 2. second joint; 3. third joint. 



Fig. If. Left ma.xilla of the same immature specimen, from below; X 17. 1. first joint; 1'. lobe 

 from second joint; 1^. lobe from third joint; p. palp. 



Fig. Ig. Left maxilliped of the same immature specimen, from below; X 13. The epipod 

 omitted. 



Fig. Ih. First left thoracic leg (the appendage behind the gnathopods) of the same immature 

 specimen, from behind; X V- 



Fig. li. Last (sixth) left thoracic leg of the same specimen, from behind; X ^. 

 Fig. Ik. Posterior half of abdomen, with the distal parts of the uropods and telson omitted, of 

 the adult male from Sta. 4719, from the left side; X ~f. 



Fig. 11. Fifth and sixth abdominal segments with telson and the right uropod of the same adult 

 male, from above, X -j-- 



Fig. 2. Boreomysis media, sp. nov. 



Fig. 2a. Anterior part of an adult female from Sta. 4652, from above; 12. 



Fig. 2b. Telson and left uropod of the same specimen, from above; X 16. a. a portion of the 

 right lateral margin of the telson more highly magnified, viz. X 64, in order to show the arrangement 

 and relative size of the lateral spines. 



Fig. 3. Boreomysis fragilis, sp. nov. 

 Fig. 3a. Anterior part of a male from Sta. 4679, from above; X 16. 



