280 MGERA FUSCA. 



ALLORCHESTES BREVICORNIS (DANA). Dredged in six 

 fathoms water, in Esquinialt Harbour. 



Dana records it from the Bay of Islands, New 

 Zealand. 



MCERA FUSCA, N. S. Antenniarum superiorum secundum 

 articulum pedunculi non longioreni quum primum haben 1 ? ; 

 flagellum et pedunculum subaequalia ; gnathopoduui par secun- 

 dum cum propode magno palmam edentulatum habens ; perio- 

 podum posterius pares margiueni posteriorem non serratam. 



The body is long and slender; the superior 

 antennas 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 affinity to Mcera 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 antennas, 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- 



