AONIDES PAUCIBRANCHIATA. 483 
projecting freely upward nearly as far as the branchia. The latter remains subulate at the 
fiftieth foot. Dorsal bristles of the first foot slender, long and finely tapered, and the 
ventral are also long and slender. Behind the tenth foot the bristles are similar and of 
a dull golden colour. The ventral bristles form two groups, viz., upper finely tapered forms, 
and a lower series of shorter, broader bristles overlapping the former, and with acute tips. 
At the fiftieth foot a notch separates the two divisions, and the modified ventral bristles 
have a sharp and slightly hooked point minutely dotted under a high power. 
In Plate XCVI the tenth foot is drawn in fig. 8, and the fiftieth foot in fig. 8a, whilst 
a bristle is shown in Plate CV, fig. 6. Remarks on the species are made on p. 167 of 
vol. m1. Part I, of this Monograph. 
A fragmentary form, yet with such definite characters as to render its identification easy. 
The first foot carries a subulate branchia and a large lanceolate lamella. The ventral 
division also has a lanceolate process, and the bristles in both are long and slender. From 
the shape of the body the lamelle and bristles occupy the dorso-lateral edge, so that the 
branchiz, which readily fall off, pass transversely inward over the flattened dorsum. At 
the tenth foot the ventral lamella forms a broad, almost semicircular flap, with a tendency 
to a peak inferiorly. The ventral series of shorter, broader bristles overlaps the finely tapered 
forms stretching outward along the lamella. 
The branchiz remain subulate at the twenty-fifth foot, and stretch beyond the elongated 
upper lamella, which is acutely lanceolate superiorly, its outer edge being comparatively 
even till it curves inward inferiorly. The ventral lamella forms a blunt flap, with the bristles 
in the groups just mentioned. At the fiftieth foot (Plate XCVI, fig. 8a) the branchia is still 
rather long and subulate, and the upper lamella is prominent and rounded inferiorly, whilst 
superiorly it is acutely lanceolate. The upper bristles of the dorsal series are long. slender 
and finely tapered. A notch separates the two divisions of the foot. The ventral lamella 
is also prominent and rounded. generally with a short peak. The modified bristles ventrally 
show a sharp and slightly hooked point, minutely dotted under a high power. No wings 
are visible in either dorsal or ventral bristles. 
SYNONYMS. 
1909. Scolecolepis, 1. McIntosh. Ann. Nat. Hist., ser. 8, vol. in, p. 176. 
1922. 3 lamellata, idem. Ibid., ser. 9, vol. ix, p. 21. 
AONIDES PAUCIBRANCHIATA, Southern, 1914. Plate CXXXVI, fig. 8—anterior foot; fig. 
Sa—bristle. 
Specific Characters.—Snout acute, but less abruptly so than in A. oxycephala, and pro- 
longed backward, to end in a peak. Tour kidney-shaped eyes with lenses occur posteriorly, 
the anterior pair having a larger space between them. Body of a similar form, though much 
smaller than A. oxycephala ; segments fifty to eighty ; only ten (or eleven) pairs of branchiee 
anteriorly. Heet resemble those of the common species. Bristles not dotted. Hooks 
commence on the thirty-sixth foot, with two spines above the great fang. ‘Two pairs of anal 
cirri, the ventral being the shorter, whereas A. orycephala has two lateral plates on each side 
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