Rev. A. M. Norman’s Notes on British Amphipoda. 131 
and descriptions; thirdly, from some of the figures in Boeck’s 
plate xxiv. having been wrongly lettered. 
Boeck’s plate xxiv. fig. 24, has nothing to do with the 
present species, and probably ought to have been lettered 4, 
as representing, though imperfectly, a second gnathopod of 
the female of Melita palmata (or possibly, from the shortness 
of the wrist, the second gnathopod of Melita pellucida, G. O. 
Sars) ; the 4 & should perhaps be 2 /, and intended to repre- 
sent the second gnathopod of the immature male of Chezro- 
cratus Sundevalli. 
While all the other general characters are nearly similar in 
the two sexes of Chetrocratus Sundevalli, the second gnatho- 
pods are widely different. That of the male (Pl. XII. 
figs. 1-3) has a large and remarkably ovate hand; this hand 
is densely clothed with long sete towards the distal extre- 
mity of the upper margin, and the lower side (not the margin 
only) is also densely setose ; but the peculiarity of the hand 
is that the strongly curved finger, which is half the length of 
the hand, does not close against the margin, but upon the 
middle of the inner face of the hand, where there are three 
or four spines, against which it in some measure closes, the 
position being such that when the hand is viewed from the 
outside the closed finger is completely hidden*. This hand 
has been well figured by Hoek and Blane, but not accurately 
by any previous authors; and I give illustrations of three 
forms of it. 
The second gnathopod in the female (Pl. XI. fig. 10) is 
very like the first gnathopod (fig. 9), but the finger is straightly 
porrected and the face of the wrist is furnished with nume- 
rous transverse rows (about seven to nine in number) of 
hooked sete ; these sete are confined to the front half of the 
limb, and the innermost seta of each transverse row is very 
short, while each seta thence to the margin increases in length 
in most regular gradation, the outermost and longest being 
simple (¢. e. not hooked). 
The hinder segments of the pleon with their three dorsal 
teeth and intervening long erect spines are well represented 
by Stebbing (pl. v. fig. 4), Hoek (pl. x. fig. 13), and Blanc 
(tig. 77). A glance at this portion of the body will suffice 
to distinguish this species from all others except its congener 
C. assimilis. 
Hab. Outer Skerries Harbour, 2-5 fath.; off these same 
islets in 40 fath., and also in Balta Sound, Shetland; the 
* In the immature male (fig. 3) the finger is shorter and thicker in 
proportion to its length and closes on the palm instead of on the face, 
while the lateral spines are not developed. 
g* 
