PLATE 1. ¢ 
Fig. 1. Chalaraspis alata WitLemois-SuHM. 
Fig. la. Anterior part of the body of an adult male from Sta. 4719, from above; X *. 
Fig. 1b. Anterior part of the body of the same male, from the left side; X +. o. eye. 
Fig. le. Right antennal squama of an immature specimen from Sta. 4672, from above; X 13. 
Fig. 1d. Left mandible of the same immature specimen, from below; X +2. 
Fig. le. Left maxillula of the same immature specimen, from below; X %. 1. first joint; 1. 
lobe from first joint; 2. second joint; 3. third joint. 
Fig. 1f. Left maxilla of the same immature specimen, from below; X 17. 1. first joint; 12. lobe 
from second joint; 1§. lobe from third joint; p. palp. 
Fig. 1g. Left maxilliped of the same immature specimen, from below; X13. The epipod 
omitted. 
Fig. 1h. First left thoracic leg (the appendage behind the gnathopods) of the same immature 
specimen, from behind; x +. 
Fig. li. Last (sixth) left thoracic leg of the same specimen, from behind; X -s.. 
Fig. 1k. 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 +y. 
Fig. 11. Fifth and sixth abdominal segments with telson and the right uropod of the same adult 
male, from above, X +. 
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. 
