398 
THE VOYAGE OF H.M.S. CHALLENGER. 
Maldanella neo-zealanicB, n. sp. (PI. XLVII. fig. 4 ; Pi. XX Va. fig. 13). 
Habitat . — Trawled at Station 168 (off Kidnapper Point, New Zealand), July 8, 1874; 
lat. 40° 28' S., long. 177° 43' E.; depth, 1100 fathoms; bottom temperature 37°‘2, 
surface temperature 57°‘2 ; sea-bottom, blue mud. 
The sole example is imperfect, consisting of twenty-two segments ; and as the last 
two are hookless, probably only the penultimate and the funuel are absent. The length 
is about 51 mm., and the greatest diameter a little more than 2 mm. 
The cej)halic lobe is characterised by the fulness of its marginal lamella, which forms 
a frill all round, with the exception of the median ventral region where the papilla occurs. 
It is as usual deepest a little behind the anterior margin (PI. XLVII. fig. 4), and though 
some wrinkles are present at the termination of the anterior third, no notches or crena- 
tions proper exist, either there or dorsally. The dorsal portion of the lamella is 
remarkably deep, and, moreover, presents no traces of a median depression or notch. 
The upper surface of the cephalic plate is marked by a regular series of curved lines, the 
concavity being directed forward (or ventrally) as in the former species. Instead, 
however, of being flat, this surface has a low median ridge. The latter commences a, 
little beloAV the middle, is somewhat more prominent than in allied forms, narrows a 
little at the commencement of its lower third, and then flattens out like the legs of a Y 
become continuous with the ventral median process. The furrows at the sides are slightly 
marked and shallow, ceasing at the expansion just alluded to. They are tinted of thp 
usual dull yellow hue. The ventral median process is a flat rounded papilla, and the 
surface behind it is slightly hollowed out (between the legs of the Y)- Another feature 
is the presence of a furrow on each side, sloping outward and slightly downward from the 
dorsal end of the median ridge to the margin, cutting off a somewhat triangular area 
on each side of the yellowish furrow. 
In the form of the body this species agrees with the preceding, but the hooks 
(PL XXVa. fig. 13) slightly differ. They agree in having three teeth above the great 
fang and an indistinct fourth, but the vibracular eminence is much more pronounced 
than in the last species, and the curve between it and the great fang is larger. 
The fine greyish mud in the alimentary canal was not rich in organisms, only a few 
minute Foraminifera being observable, and an occasional Diatom. 
The cuticle in this form is also comparatively thin, but the hypoderm is 
remarkably thick, the long and minutely granular cells being arranged in close parallel 
rows from without inward, and thus presenting a radiate appearance. The circular 
muscular coat is powerful, and the dorsal and ventral longitudinal are proportionally 
large. The oblique muscles occupy the same relations as in the last species. 
