280 MRA FUSCA. 
ALLORCHESTES BREVICORNIS (Dana).—Dredged in six 
fathoms water, in Esquimalt Harbour. 
Dana records it from the Bay of Islands, New 
Zealand. 
MG:RA FUSCA, N. 8.—Antenniarum superiorum secundum 
articulum pedunculi non longiorem quum primum habens; 
flagellum et pedunculum subsequalia ; gnathopodum par secun- 
dum cum propode magno palmam edentulatum habens ; perio- 
podum posterius pares marginem posteriorem non serratam. 
The body is long and slender; the superior 
antennze are about half the length of the animal, 
the peduncle being scarcely longer than the 
flagellum ; the secondary appendage being half 
the length of the primary, the second joint of the 
peduncle being about the same length as the first. 
Second pair of gnathopoda having the propodos 
large; palm without teeth, and defined by a small 
pointed process ; posterior pair of pereiopoda 
having the posterior margin of the base smooth. 
In its general appearance this species bears a 
near aflinity to Mera grossimana, as well as to 
M. tenella, from the Feejee Islands; the only 
appreciable distinctions being in the shorter 
length of the second joint of the antenne, the 
absence of teeth from the palm of the hand in the 
second pair of gnathopoda, and in the even margin 
of the last (the only remaining) pair of pereio- 
