96 
THE VOYAGE OF H.M.S. CHALLENGER. 
while numerous short spines occur near the point of attachment which lies toward the 
anterior margin, 
A glance at a foot in profile shows the essential distinction between this form and 
Harmothoe imbricata, irrespective of the condition of the cirri abeady alluded to. While 
in the latter the dorsal and ventral bristles are fahdy balanced in regard to size, those of 
the new form are not so, the ventral much exceeding the dorsal tuft. The inferior 
division of the foot, moreover, in Harmothoe henthaliana bears a large flattened and 
somewhat lanceolate lobe projecting far outward. 
The dorsal division of the foot carries a grouj) of rather long boldly curved bristles 
(PI. Xa, fig. 9), finely serrated and with peculiarly flattened tips which have a “ knife- 
edge ” aspect on the convex side. The edge, moreover, shows a slight curve in the 
middle, and the shaft of the bristle is striated. There is no marked distinction between 
the longer forms externally (next the ventral in a lateral view) and the shorter next the 
body. 
The ventral bristles consist superiorly of a few slender forms with elongated spinous 
regions and a distinctly bifid tip, and a conspicuous series of much stronger bristles 
beneath (PI. Xa. fig. 10, which represents an average form). The great proportional 
size of the latter is characteristic. The tip is boldly hooked, and a minute secondary 
process occurs below. From the latter to the commencement of the serrated region a 
peculiar flattening (knife-edge) of the smooth portion exists, and the outline is slightly 
convex. 
In transverse section the chief feature is the comparatively large size of the neive- 
cords. 
Harmothoe haliaeti, MTntosh. 
Harmothoe haliaeti, MTntosli, Trans. Zool. Soc. Lond., vol. ix. pt. vii. p. 384, pi. Ixix. figs. 7, 
8, 9, and 10. 
Habitat. — Dredged in the Faeroe Channel by H.M.S, ‘‘ Knight Errant ” at Station 3, 
August 3 and 4, 1880, in 53 fathoms. 
The capture of complete examples of this form enables the description abeady given 
to be supplemented, since only a fragment of the posterior end of the Annelid was 
dredged by Dr, Gwyn Jeffreys in his yacht “ Osprey ” in the Minch. It is satisfactory 
to find that the data relied on in the case of the fragment have withstood further tests. 
One specimen measures in length about 18 mm., with a breadth of 6 ’5 mm. from the 
tips of the bristles ; but from the appearance of other fragments this is rather a small 
example. Unfortunately the rest had been dried. 
The head somewhat resembles that of Lagisca, having a pair of well marked and 
