of the Fishery Board for Scotland. 475 
Sarsiella (2) capsula, Norman. Pl, xxv., figs, 27-32. 
Three specimens of an Ostracod—a Sarsiella—were obtained in some 
sand collected about twenty-two miles to the north of the Shetland 
Islands on May 17th, 1901. The sand had been for a time immersed in 
formaline, and this may probably be the reason why the shells of these 
specimens are comparatively soft and, when seen from the side (fig. 27), 
show a somewhat even surface instead of being solid, and with the 
surface more or less corrugated as seen in typical specimens (see Part II. 
of Monograph published by Professor G. S. Brady and the Rev. 
A. M. Norman*),. 
The specimen represented by the drawing (fig. 27) is that of a 
female, and the shell when seen from the side is somewhat obliquely rotun- 
date, the length being rather greater than the height, and measuring about 
1:2 mm. by ‘9 mm, respectively ; the produced posterior projection is finely 
ciliated, the ventral margin is also fringed with delicate hairs. The 
posterior end is slightly compressed and bounded by an indistinct ridge 
which extends obliquely across from the dorsal to the ventral margins. 
The surface of the shell is not rugose as in the typical Sarsiella capsula, 
but is ornamented with numerous minute pits. 
In the dorsal view of the shell given in figure 28, the valves are open to 
some extent on the ventral aspect ; this was due to the soft structure of 
the shell (the shell could not be mounted dry in the usual way, but had to 
be kept in water under a cover-glass while being figured). 
The various appendages of the contained animal resemble the drawings 
given in the Monograph by Brady and Norman already referred to. 
The secondary appendages of the antenne are rudimentary. Hach 
consists of a rounded tubercle bearing two small spiniferous sete (fig. 30a). 
The caudal lamina is provided with six spines on the one side, but only 
five on the other; on this side there is no trace of a sixth spine, nor any 
indication that a sixth had been present but had been broken off. 
In this specimen two ova were observed. 
The shell of the male differed little, if at all, from that of the female, 
except that it was slightly smaller. The appendages also appeared to be 
similar, except that the secondary branches of the antennze were, as in 
closely allied species, more developed and fitted for grasping, and that the 
caudal lamina was only provided with five spines on both sides. 
The first joint of the autennules in the male is rather longer than the 
next, and the second, third, and fourth joints gradually decrease in 
length, the fifth joint is almost obsolete, so much so that it is difficult to 
make out whether there is really a fifth joint or not. There are no 
sete on the first joint; the second joint is furnished with a small seta 
near the middle of the upper margin, and another on its lower and its 
upper distal angles ; the third joint bears one seta on the upper and two 
on the lower distal angles, while the fourth and (?) fifth joints carry 
several terminal setee as shown in the drawing (fig. 29) ; some of these 
hairs have an annulated structure, but this is not shown in the drawing. 
The antenne of the male are provided with a number of long 
plumose sete, and the secondary branches, though somewhat rudimentary 
(fig. 30), are moderately elongated and are apparently four-jointed—the 
two middle joints being very small; there is also a minute terminal 
appendage, 
The first maxille (fig. 31) are similar to those of the female in structure 
and armature. 
* A Monograph of the Marine and Fresh-water Ostracoda of the North Atlantic and of 
North-western Europe, Part II., Sct. Trans. Roy. Dublin Soc., vol. v, ser, ii. (January, 
1896), p. 677, pl. lx., figs, 1-4, 18. 
