178 
that horizontal currents are produced, as well as a central 
one from before backward. The dorsal papillae seem to 
perform the functions of branchiae. They also contain ova, 
which the ciliary currents serve to distribute. 
Feet simple, with seven to ten strong spear-shaped golden 
setae, apex toothed on one side. Near the dorsum of the foot is 
a small fascicle, containing four to six short curved toothed 
bristles. 
Head concealed, roundish, emarginate. Upper antennae 
three, the lateral ones very short, two jointed, central one 
much longer, equal to the two lower antennae. Eyes four, 
distant. Tentacular cirri two pairs. 
Readily distinguished by the long, flesh-coloured body, 
and marginate, smooth scales In some young specimens, 
the black border is absent or ill-defined. 
P. maculosa , sp. nov. Scales kidney-shaped, smooth, 
entire, membranous, having a dark curved spot round the 1 
centre, seated on alternate feet, intermediate feet bearing | 
cirri ; superior antennae three equal ; ventral surface of pos-* 
terior rings, marked with four black dots. 
Very rare; only one specimen found in company with 
P. aster ince. 
The specimen before me, which unfortunately has lost the 
anal segment, is oblong-obtuse, slightly narrowed from the 
middle, breadth two lines, by f inch long. Scales twelve 
pairs, covering the head and feet, firmly attached, hyalitie, 
especially near the border, which is slightly undulated, 
crossed from the inner margin by a retort-shaped black mark. 
Feet obtuse, obscurely biramous ; upper branch much 
shorter, the setae short, falcate, and serrate ; lower branch 
bearing a tuft of twenty to thirty slender, half spear-shaped, 
oblique, pale setae, toothed on one side, and ending in one or 
two larger teeth ; shaft long, smooth, terete. 
Head concealed, round, notched in front ; eyes four, placed 
on the occipital portion ; upper antennae three equal, two 
