338 A HISTORY OF RECENT CRUSTACEA 
ings of many of them that excite some surprise by the vivid- 
ness of the colouring. His Gnathia asciaferus has ‘man- 
dibles’ of unusual shape, 
their axe-like appearance 
being alluded to in the 
specific name. Gnathia 
stygius (Sars) is more than 
half an inch long. 
Huneognathia may be 
instituted as a new genus 
to receive the species 
Anceus gigas, Beddard, 
from Kerguelen. It is 
strikingly distinguished 
from Gnathia by having 
the first gnathopods in the 
male six-jointed. The pleo- 
pods have both branches 
fringed with long plumose 
hairs. The male of Huneo- 
qnathia gigas (see Plate 
panes Hea hah aaa XIV.) exceeds three-fifths 
eee eae ‘Hesse]. Chest ofan anes length, and 
is therefore the largest known member of the family. The 
fourth and fifth segments of the peraeon are markedly the 
widest. 
Anceus bathybius, Beddard, dredged from a depth of 
900 fathoms, will no doubt require to be transferred to 
another new genus, but the species, being founded on a 
fragment of a specimen, may wait for a new generic name 
till fuller material is obtained. 
Anceus Danielii, Hesse, 1884, may also represent a dis- 
tinct genus, and probably, whenever the family 1s mono- 
graphed, it will develop as plentiful a harvest of genera as 
its neighbours. 
