392 J. Hights on a Crustacean from the Antarctic Seas. 
one above the other, with an elongate multiarticulated filament. 
Mouth as in the ordinary Jsopods ; mandibles not palpigerous; 
the two superior foot-jaws expanded into a well defined lower 
lip, bearing palpi. 
Thorax separated into seven distinct segments, the three poste- 
rior ones biarticulate near their lateral extremities; each segment 
giving origin to a pair of perfect legs, terminating with a strong 
and slightly curved nai 
in length as they proceed to the place of insertion; segmen 
triangulate, with angular projections on their surfaces; edges of 
are indistinct; segments angular, external one much the longest; 
extremities and angles likewise spined. Mouth with the labrum 
united, sub-cordate; its palpi five-jointed, snugly eee 
The thoraa is composed of seven distinct segments, each one 
being beau y ornamented on its superior surface by an elon- 
