•236 
THE VOYAGE OF H.M.S. CHALLENGER. 
Notocirrus, Schmarda, char, emend. 
Notocirrus capensis, n. sp. (PL XXXVII. figs. 3, 4 ; PL XVIIIa. fig. 15). 
Habitat . — Found between tide-marks at Sea Point, near Cape Town. 
A form measuring about 160 mm. in length and about 3 '5 mm. in breadth at the 
anterior third. It closely resembles the so-called Notocirrus tricolor, Johnston, in 
external apj)earance. 
The head (PL XXXVII. fig. 3) approaches that of the dark varieties of Notocirrus tri- 
color, Johnston. Near the posterior border, on the dorsal surface, are four eye-specks, those 
on the right being less distinct than those on the left. The ventral surface is marked by 
a broad longitudinal furrow, which is longer than in Notocirrus tricolor from Guernsey. 
The dental apparatus is more deejDly placed than in Liimhriconereis. The maxillae 
are proportionally short, the anterior fang being within the margin of the great dental 
plate. There are six large teeth at the base of each maxilla, internally. The latter seems 
to be armed throughout its inner border, about fourteen teeth being visible in the plate 
examined. Four plates occur in front of the latter. The most anterior has a single 
long curved hook ; the next has a long tooth and four shorter ; the third presents three 
teeth ; the fourth (that adjoining the great dental plate) shows four or five teeth, which 
like all the previous are proportionally large and sharp. In addition there are certain 
isolated horny processes, but their connections could not be accurately determined. The 
mandibles are dark brown, with a broad anterior region and a pair of short, widely 
separated limbs. The dentary edge is broad, obliquely conical, and slightly notched. 
The apex alone is slightly paler than the rest. The median fissure reaches the centre of 
the anterior region. Very long chitinous rods pass backward from the base of the 
maxillary region. 
In the structure of the teeth this form then wholly differs from the British Notocirrus 
tricolor, Johnston, the dentition in w^hich approaches Arabella, an opinion shared by the 
late Prof. Grube. 
The feet (PL XXXVII. fig. 4) resemble those of the British species, the posterior lobe 
being well developed, and directed at a considerable angle to the rest of the foot, back- 
ward, upward, and outward. On minute examination, however, it appears that the 
dorsal process or papilla is much less developed than in Notocirrus tricolor of the 
same size, and this feature is most marked in the anterior third, where the contrast is 
very evident in the specimens from Guernsey. 
Unfortunately the bristles of the tenth foot are absent. At the thirtieth there are 
three groups of short bristles with wings, a larger superior series, and two smaller 
inferior. All are tinged of a brownish hue, and the edges of the wings of the lower bristles 
in the upper group are more distinctly though more minutely serrated than the others 
