KROYERA. 171 



AMPHIPODA. PHOXIDES. 



NATATOKTA. 



Genus KROYERA. 



Kroyera. SPENCE BATE, Cat. Amph. Brit. Mus. p. 106, but not of Synopsis 

 Brit. Amph. Ann. Nat. Hist., 2 ser. xix. p. 140, Feb. 1857. 



Generic character. Like Monoculodes, but having the eyes 

 apart, and the second pair of gnathopoda chelate. 



THE head is produced and anteriorly depressed. The 

 eyes are apart and distinct. The superior pair of an- 

 tennae are without a secondary appendage. The in- 

 ferior are slightly longer than the superior. The first 

 pair of legs have the hands tolerably robust ; the wrist 

 anteriorly produced along the inferior margin of the 

 hand, until the tip reaches the lower edge of the palm. 

 The second pair are longer than the first, and have the 

 anterior extremity of the wrist produced along and ex- 

 tending beyond the inferior margin of the hand ; the 

 hand has the inferior angle produced anteriorly, so as 

 to form, with the impinging finger, a perfectly didactyle 

 claw. The third and fourth pairs of legs are uniform 

 and subequal. The fifth and sixth pairs are uniform and 

 subequal, being robust, and scarcely longer than the 

 preceding pair. The seventh pair are very long, and 

 terminate in a straight styliform finger. The caudal ap- 

 pendages are double -branched, and the central tail-plate 

 is squamiform and single. 



The species on which this genus was founded was first 

 described as belonging to the same genus as Monocu- 

 ?, and under the name of Kroyera. But on dis- 



