of the Fishery Board for Scotland. 453 
The abdomen is narrow and short, being scarcely more than a fifth of 
the entire length of thorax and abdomen. 
The caudal furca are very short. No furcal sete are shown in the 
figure, as they had all been broken off. 
The fifth pair of thoracic feet are of moderate size, the first joint is 
equal to rather more than half the length of the second one, and is 
slightly gibbous on the interior aspect, the inner margin is also densely 
fringed with minute hairs ; the second joint is slightly distorted, being 
bent inward somewhat abruptly near the middle; this joint is armed with 
three moderately stout setiferous terminal spines, and is also furnished 
with a few minute setz on the lateral aspect and near where the joint 
is bent as shown in the drawing (fig. 9). 
The occurrence of Xanthocalanus borealis in the neighbourhood of the 
Shetland Islands adds another species to the copepod fauna of Scotland. 
The distribution of this species appeazs to be somewhat restricted, as, 
with the exception of a single young female obtained in a gathering 
collected north of the New Siberian Islands, Prof. Sars has only found it 
in Stavanger Fjord, and in a few other places off the west coast of 
Norway, but its occurrence in this Shetland gathering seems to indicate 
that it may after all have an extensive distribution. 
Phenna zetlandica, sp.n. Pl. XXII, figs. 5-7. 
A male specimen of a (?) Phenna, which I have provisionally 
named’ P. zetlandica, was obtained in the same gathering with the 
Xanthocalanus just described, agrees in some respects very closely 
with Phenna spinifera, Claus, and may probably be only a form 
of that species. The specimen (fig. 5) imeasures nearly two and a 
half millimetres (,4, of an inch) in length. The thorax is moderately 
robust, and when seen from above is broadest behind the middle. The 
cephalo-thoracic segment, which is about equal to half the entire length of 
the animal, tapers gradually to the broadly rounded forehead, the next- 
three thoracic segments are short. The abdomen is narrow, and its 
length is equal to little more than a third of that of the cephalo-thorax ; 
it consists of five segments, the genital segment is slightly longer than 
any of the others, the last is very short ; the caudal furca are very short 
(the furcal hairs are not shown, as they had accidentally been broken off). 
The antennules, which appear to be the same on both sides, do not 
reach to the end of the abdomen, the first six joints are short, the seventh, 
eighth, and ninth are partly coalescent, the tenth to the fifteenth joints, 
which are of moderate length, are sub-equal, the seventeenth joint is also 
nearly equal to these in length, but the remaining joints are rather shorter ; 
the antennules are only sparingly setiferous, as shown by the drawing 
(fig. 5), 
The fifth pair of feet, in which both branches are developed, are very 
similar to those of Phanna spinifera, Claus, The right branch is elon- 
gated and slender and composed of four joints, the first three are of nearly 
equal length, but the last is about one and a half times the length of the 
preceding joint and considerably attenuated so as to resemble a spine 
rather than a joint (fig. 6). The left branch is rather longer than the 
right one and apparently five-jointed ; the terminal portion of this branch 
consists of two appendages, the inner one being short and moderately 
broad, rounded at the end and fringed with sete, the other is narrow and 
longer than the inner one and forms with it a kind of finger and thumb- 
like arrangement, as shown in figure 7. 
The fifth thoracic feet of this Shetland specimen are seen to differ 
