diameter; above
this, on each side of the carina, there is a space with similar but
smaller little spheres, and still higher up still minuter ones; others
occur on different parts of the capitulum; these spaces are seen to be
distinctly separated from each other, and present a beautiful appearance
under a high power.

_Peduncle_, as long as, or rather longer than, the capitulum: in one set
of specimens, however, it was thrice or four times as long as the
capitulum. The peduncle, in some specimens, was conspicuously covered
with transverse plates of yellowish hard chitine.

_Filamentary Appendages._--Three on each side; one on the flank of the
prosoma, with a pair beneath the basal articulation of the first cirrus;
relative lengths various, but the posterior filament of the pair under
the cirrus, is the shortest. _Mouth_; palpi not much acuminated; maxillae
step-formed, but with the upper or first step in some specimens
indistinct, or forming a curve. _Cirri_; the segments of the first
cirrus and of the posterior arm of the second cirrus are highly
protuberant, the protuberances sometimes equalling half the thickness of
the segments themselves. Caudal appendages smooth, rounded.

_Size._--The largest specimen which I have seen, in the collection of
Mr. Cuming, had a capitulum 1-1/10th of an inch long, and 1-1/4 wide;
therefore not quite equalling in size the largest specimens of _L.
anatifera_.

_Colours._--When fresh, valves blueish-grey from the underlying corium,
edges of all the valves and round the orifice, and round the top of the
peduncle, bright orange-yellow, passing into the finest scarlet, and
varying slightly in tint in different specimens. Space between the
carina and the other valves, and between the occludent margins of the
scuta, rich purplish-brown; peduncle either pale or purplish-brown, or
only clouded on the sides with the same. In young specimens, peduncle
nearly colourless; and in those under a quarter of an inch long in the
capitulum, the top of the peduncle has not acquired its orange tint.
Sack pale, leaden-purple, body the same, but paler and more reddish;
cirri (but only the tips of first pair) tinted with fine golden orange.
Immature ova in peduncle beautiful blue. After being long kept in
spirits, the colours are changed, weakened, or discharged, as in _L.
anatifera_ and _L. anserifera_, and the valves become opaque. In some
long-kept specimens the corium everywhere had become pale brown