72 
THE VOYAGE OF H.M.S. CHALLENGER. 
Valparaiso), December 14, 1875 ; lat. 33° 31' S., long. 74° 43' W. ; depth, 2160 fathoms ; 
bottom temperature 35°'2, surface temperature 62°’0 ; sea-bottom, blue mud. 
It is of good size, 38 mm. in length, and 15 mm. in breadth inclusive of the bristles. 
The head is devoid of any trace of eyes, so that it forms another example of the 
influence of habitat on these important organs. The bristles and other j^arts correspond 
with the previous specimens. A developing foot exhibits setigerous lobe, cirrus, dorsal and 
ventral bristles in miniature, showing that the reproduction of all these parts occurs simul- 
taneously, and that the peculiar characters of the bristles exist independently of size. 
The intestinal canal of this example contained a c[uantity of dark brownish mud, in 
which were sponge-spicules, vegetable and other organic debris. 
The ventral area is well marked, but thin, and the nerves are greatly flattened. 
The hypoderm externally is apparently diminished, but internally connective tissue and 
fibres form a protection. The cuticle is quite smooth. 
Eunoa capensis, n. sp. (PI. XV. fig. 5 ; PI. XIa. figs. 1—3). 
Habitat. — Found between tide-marks at Sea Point, near Cape Town, along with 
Terehella, Sahella, and Sabellaria. 
A fragment of the anterior end of a tolerably large species (about 8 mm. in 
diameter). The scales are absent. 
The head is characterised by the great size of the base of the tentacle, which occupies 
the whole front of the head. The tentacle itself is absent. The antennse are somewhat 
short and cylindrical, with a filiform tip passing off abruptly from the former. The 
palpi are moderately elongated, tomentose under a lens, and when magnified show a 
dense coating of blunt lanceolate papillae, which pass up to the base of the short filiform 
tip. A pam of small eyes lie at the outer and posterior border of the head, while a pair 
occur a little behind the anterior border, and lateral in position. The dorsal cirri are 
absent, but one of the tentacular cirri presents a very slight enlargement below the filiform 
tip, and a column rather closely covered with somewhat short and thick papillae, having 
a nearly cylindrical outline. 
The ventral cirri are very short. 
The dorsal group consists of a small tuft of pale bristles, the structure of which is 
not readily made out from their peculiar twist, the tip (PI. XIa. fig. 1, one of the 
shorter examples) ends in a somewhat blunt rounded process, below which, on the convex 
side, are a series of spinons rows. Some of the larger forms in the fascicle (e.p., PI. XIa. 
fig. 2) show a more extended smooth portion at the tijD. A similar condition occurs in the 
much larger dorsal bristles of Eunoa hispanica^ and an allied bristle appears in Kinberg’s ^ 
^ Freg. Eugen. Resa, p. 20, Tab. vi. fig. 29, Gs. 
1 Trans. Zool. Soc. Land., ix. p. 396. 
