Encarida — Euphausiacea. 49 
Division 5 . — EUCARIDA. 
The carapace is coalesced dorsally with all the somites of the Table-case 
thorax. There is no brood-pouch. No - 8 - 
Two Orders of very unequal size are included in this Division : — 
Order 1. — Euphausiacea. 
„ 2. — Decapoda. 
Order 1.— Euphausiacea. 
The members of this Order were formerly included with the 
Mysidacea in the Order “ Schizopoda.” They are, however, very 
closely allied to the Decapoda, and are distinguished from the 
Meg any ctipl banes noruegica, male, from the side, about twice natural size. 
(From Lankester’s “ Treatise on Zoology.”) 
more primitive types of that Order chiefly by the fact that they 
possess only a single series of gills (podobranchiae), and that none 
of the thoracic limbs are distinctly modified as maxillipeds. 
Most of these animals, like some of the lower Decapods, are 
phosphorescent. The light-producing organs, situated on various 
parts of the body and limbs, were formerly described as “ acces- 
sory eyes ” ; they are seen as little red spots along the sides of the 
body in the coloured drawing of Nematoscelis microps exhibited in 
this case. 
Meganyctiphanes norvegica ( Fig. 30), one of the larger species 
of the Order, occurs in deep water off the British coast. In Loch 
Fyne, where the specimens here exhibited were obtained, the 
species forms an important food of the herring. 
E 
