106 AMrniroDA noemalia. 



3. Mouoculodes demissus. 



Monoculodcs demissus, Stimpson, Marine Invert, of Grand Munaji, 

 p. 54. 



" Body smooth and shining, broad and thick anteriorly, and slender 

 posteriorly. Pleon constituting more than three-sevenths of the 

 total length. Coxa) of the fii'st five pairs of considerable size ; 

 the rest very small. Head tumid, terminating anteriorly in a 

 large subtriangular rostnim curving downwards, at the base of 

 which, above, are the large vermilion-coloured eyes, which are so 

 near together as to appear one, even when viewed from above. 

 Antenna) thick -based, and about equal in length, reaching the 

 fourth segment of the pereion ; the superior ones with a much 

 longer flageUum than the subpediform inferior ones. Both pairs 

 of gnathopoda ha%ang the propodos oval ; dactylos strong ; carpus 

 produced, so as to antagonize with the extremity of the dactylos ; 

 the second pair the larger. Pereiopoda simply unguiculate ; third 

 and fourth pairs very short, fifth of great length. Three pairs of 

 posterior pleopoda nearly smooth, of considerable length, tapering 

 to fine points, the antepenultimate pair reaching to the extremity 

 of the ultimate. Colour wine-yellow. 



'' Length 0-35 iuch. 



" Hah. Dredged in four fathoms, on a coarse sand and nullipore 

 bottom, off Duck Island boat-moorings." — Stimpson. 



22. KROYERA. 

 E^royera, Spence Bate, Synopsis, 8fc,, Attn. Nat, Hist. Feb. 1857. 



Cephalon produced and anteriorly depressed. Eyes not coalesced 

 into one. Superior antennae not appendiculate. First pair of 

 gnathopoda subchelate ; carpus inferiorly produced along the 

 inferior margin of the propodos. Second pair chelate ; carpus 

 produced along the inferior margia of the propodos. Fifth pair 

 of pereiopoda considerably longer than the preceding. Posterior 

 pair of pleopoda bii'amous. Telson squamiform, entire. 



Tliis genus is named in honour of the distinguished Danish 

 natui'alist. 



1. Kroyera arenaria. (Plate XVII. fig. 4.) B.M. 



Kroyera arenaria, Spence Bate, Tyneside Nat. Field Club, vol. iv. pt. 1. 

 p. 15. pi. 2. fig. 1. 



Eyes round. Inferior antennse one-foiu'th longer than the superior. 

 First pair of gnathopoda ha^-ing the propodos subchelate, ovate ; 

 palm oblique ; cai-pus produced, so as to meet the extremity of the 



