REPORT ON THE ANNELIDA. 
133 
tenth foot the main dorsal group is formed of strong brownish bristles, which are all 
broken. The inferior division has superiorly a single serrated bristle (PI. XIVa. fig. 4). 
The rest consist of the usual winged bristles. 
About the middle of the body {e.g., at the fifteenth foot) are superiorly a series of 
powerful golden bristles (PI. XIVa. fig. 5), the tips being bent at right angles to the shaft, 
and tapered to an acute point. The posterior border of the shaft is often fimbriated, 
apparently from the splitting of the chitinous fibres, for the bristles are hard and brittle. 
In this dndsion is also a group of slender simple bristles. A papilla bearing a tuft of 
slender serrated bristles occurs just behind the foregoing. The inferior branch again is 
furnished with the strong winged bristles (PI. XIVa. fig.«6) as in front, and which diminish 
in size from above downward. In regard to the arrangement of these bristles in the foot 
it is found that the strong dorsal hamate bristles spring in a semicircle in front and to the 
inner side of the dorsal spine as well as round it ; while the dense tuft of long slender 
bristles is directed from the papilla downward and backward between its own and 
the next foot. The ventral bristles pass off in a line behind the spine of the division. 
The bristles retain a similar structure to the posterior end — except that they become 
longer and more slender. 
O 
This annelid (which requires the institution of a new family) appears to differ from 
Grube’s Eulepis liamata from Pandanon in the Philipj^ines. The divergence has already 
been alluded to. The scales in Eulepis hamata are covered with papillae, whereas in the 
present form they are perfectly smooth, and the structure of the cleft also diverges. The 
remarkable bristles which characterise the upper region of the inferior lobe of the foot are 
not mentioned by Grube, who, however, may have overlooked them. The comparison of 
such with those in the same region in certain Sigalionidae [Leanira, &c.) may throw 
further light on the position of this form. This peculiar bristle has also certain affinities 
with the spinous bristle shown by Ehlers in his Nephthys picta} The dorsal hamate 
bristles again are clearly modifications of the ventral, and in some of the posterior 
examples a slight wing is present on the acute tip. 
Grube’s species had two long anal cirri, covered with minute papillae, whilst the other 
cirri were smooth. He placed it between Panthalis and Sthenelais. 
In the structure of the body- wall (PL XXXIIa. fig. 7 ) this form, while agreeing in the 
general plan, differs somewhat from the ordinary examples of the Polynoidae in the greater 
interval between the insertions of the oblique muscles, and in the flattening of the nerve- 
cords. Above the latter are transverse fibres, and in the middle line a narrow band of 
longitudinal muscular fibres. The hypoderm is slightly developed, and the cuticle is by 
no means thick. The dorsal longitudinal muscles are separated by a thin median arch, 
across which, however, a few longitudinal fibres extend. In its ordinary condition the 
proboscis differs from that in the Polynoidse in having proportionally thicker walls, 
’ Die Borstenwiirmer, ii., Taf. xxiii. fig. .35. 
