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buried beneath the sand. It is a beautiful species, swimming 
freely in sea-water. 
P. Vittata, Ehlers, Annelid. Chcetopod., 1864, t. vi.f. 7—14. 
New to Britain. Two specimens appeared in water contain- 
ing a mass of Sabellaria alveolate from New Brighton, May, 
1864 f C. H. Brown J, and I have since met with one or two 
others at Southport. 
Distinguished from P. lamelligera hy its smaller size, 
never more than a line in breadth by two to three inches 
long, filiform, very active, generally assuming serpentine or 
spiral curves ; pale olive, convex above, each ring crossed by 
a narrow, stippled , steel-grey band , about a third of its breadth. 
Head short, broadly ovate, obtuse ; antennae four apical, 
spindle-shaped; tentacular cirri four pairs, the two lowest 
very long (equal to five or six rings). Eyes large, black, 
crossed behind by the narrow first segment. Branchial leaf- 
lets ovate, reticulate, parallel with the body ; lower branchiae 
short obtuse, attached to the base of the feet. Anal segment 
bearing two leaf-like processes, resembling the branchiae. 
This active little worm resembles one figured by Sir G. 
Dalyell, but wants the central antenna. 
v P. attenuata, sp. nov.? Body very slender, from half a line 
toa line Troad,~four to six inches long ; anterior rings as 
broad as long ; branchial leaflet broadly ovate, seated on a 
pedicle as long as the feet, olive-brown veined ; lower leaflet 
ovate acute ; middle and posterior rings attenuated, twice as 
long as broad ; branchiae as wide as the segments over which 
they arch; feet small simple; bristles cultrate, curved, jointed, 
finely toothed at the base of the blade. 
In the shape and relative size of the feet and branchial 
leaflets it agrees with P. lamelligera , but the disproportionally 
slender body, and oblong segments, distinguish it at a glance 
from any form of that species with which I am acquainted. 
A solitary specimen and a portion of another are all that 
remain of this curious worm. Unfortunately, both head and 
