Mr. C. Spence Bate on new Species of Crustaceans. 491 



This species differs from White's P.Bellianus in having a horizontal 

 bifurcate rostrum to the carapace, being more distinctly tuberculated, 

 and in the pereiopoda being more strongly spinated. 



This handsome species is of a yellow colour, picked out with purple 

 between the tubercles. 



It was dredged in Esquimalt Harbour, in ten fathoms of water. 



HiPPOLYTE ESQUIMALTIANA, n. S. 



Rostrum as long as the carapace, armed with four teeth at the 

 base, the posterior being just behind the orbits, and the anterior being 

 near the centre of the rostrum, the anterior half of the rostrum 

 being straight and smooth. The inferior margin is excavate at the 

 base, and furnished with seven small teeth, the four posterior being 

 near together and posterior to the centre of the rostrum, the three 

 others being further apart, the most anterior being subapical. 



The third segment of the pleon is dorsally produced posteriorly to 

 a point. The eyes are small ; the superior antennae have the primary 

 ramus of the flagellum tolerably robust, and reaching to about two- 

 thirds of the length of the rostrum, the secondary slender and longer 

 than the primary. The inferior antennae have the scale reaching to 

 about three-fourths of the length of the rostrum, rounded at the apex, 

 subapically furnished with a small tooth upon the external margin ; 

 the flagellum (wanting). 



First pair of pereiopoda short, robust, chelate ; second pair long, 

 slender, and chelate ; the posterior terminating in a robust dactylos. 



Taken in Esquimalt Harbour. 



MCERA FUSCA, U. S. 



The body is long and slender ; the superior antennae 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 pri- 

 mary, 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. Poste- 

 rior pair of pereiopoda having the posterior margin of the base 

 smooth. 



In its general appearance this species bears a near aflfinity 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 antennae, 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 pereiopoda, and perhaps also in the short- 

 ness of the peduncle of the ultimate pair of pleopoda. 



Only one specimen of this species is in the collection ; and that was 

 taken from a sponge dredged in about ten fathoms of water in Esqui- 

 malt Harbour. It is of a brownish colour. 



JCERA WAKISHIANA, U. S. 



Anterior margin of the cephalon nearly straight ; pereion having 

 the sides subparallel, the greatest width being at the sixth segment. 



