REPORT ON THE ANNELIDA. 
:J93 
The specimens agree in appearance, number of segments, and other particulars witli 
the ordinary forms, the only point worthy of notice being the very distinct crenations of 
the ventral margin of the anal disk. The bristles and hooks coincide with those from 
Europe and America. 
One specimen is in a friable tube composed of greyish mud. The outer layers could 
easily be removed, as usual, from the pale chitinous lining next the body of the animal. 
The greyish mud in the alimentary canal abounds in Diatoms and Radiolarians, but 
with a very few minute sponge-spicules. Peculiar cylindrical transparent rods also are 
common, often with an acute point at one end, though sometimes with the point enclosed ; 
and when the apex is broken off a bifid condition is caused by the sloping sides of the 
cylinder remaining attached. A few fragments of minute Crustacea are also present. 
In transverse section the body-wall differs from that of Praxilla and Nicomache in 
the much greater thickness of the cuticle and in the extreme attenuation of the circular 
coat, which, indeed, can hardly be discerned. The hypoderm is largely developed on 
the ventral and lateral walls of the body. The nerve-area, instead of being carried 
outward by the tense and thick circular coat as in the forms mentioned, passes inward 
between the longitudinal muscles. Moreover, no canal is present. This passage inward 
is probably connected with the rudimentary condition of the circular muscular coat. 
The longitudinal ventral muscles are massive internally but taper to a thin layer which 
goes upward almost to the dorsal arch. The oblique muscles thus arise from the superior 
lateral region, and are fixed to the circular coat on each side of the nerve-area. The 
longitudinal dorsal form a very thin sheet of fibres on each side of the median line. 
The fasciculi of the muscles are comparatively coarse. A corpuscular fluid occupies 
the perivisceral chamber. 
The Clymene koreni of Hansen,^ from the Norwegian North Atlantic expedition, seems 
to belong to the same genus as the present form. 
Maldane malmgreni, n. sp. (PI. XXVa. fig. 1). 
Habitat. — Trawled at Station VI. (off the Strait of Gibraltar), January 30, 1873 ; 
lat. 36° 23' N., long. 11° 18' W.; depth, 1525 fathoms; bottom temperature 36°‘0, 
surface temperature 58°‘0 ; sea-bottom, Globigerina ooze. 
A somewhat softened fragment of the anterior end of a large Maldane, measuring 
about 36 mm. in length, with a diameter of fully 5 mm. 
It differs from Maldane sarsi, or Maldane biceps, in having a perfectly even rim 
round the anterior disk, with the exception of a slight notch over the mouth. The first 
bristled segment (that next the cephalic) presents only a long tuft of bristles, which are 
' Op. cit., p. 40. 
(ZOOL. CHALL. EXP. PART XXXIV. — 1885.) 
LI 50 
