94 
THE YOYAGE OF H.M.S. CHALLENGEE. 
The dorsal division of the foot hears a series of rather large translucent bristles 
(PL XII A. fig. 4) with very short tips and boldly marked spinous rows. The latter 
indeed very much resemble those in Evarne iinpar, though the bristle itseK is less 
tapered. 
The ventral bristles have very short tips, with a simple terminal hook. The spinous 
region is elongated, especially superiorly (PI. XIIa. fig. 5). The hispid rows, indeed, in 
the superior bristles approach so near the hook that their spines project slightly beyond 
it, or at any rate quite as far (PI. XIIa. fig. 6), a feature best observed in an antero- 
posterior view. Some of the tips seem to be slightly bifid, a character rendered less 
evident than usual by the length of the spines. 
No scales are present. 
The spinous condition of the tips of the ventral bristles resembles that of Sars’s 
Lcenilla mollis,'^ from Drobach and Lofoten; though the organs perhaps are less setose. 
The forms are somewhat allied. 
Lagisca (?) hexactinellidce, n. sp. (PL IV. fig. 5; PL XIIa. figs. 14—16). 
Habitat. — Procured in the Hexactinellid sponge containing Sgllis ramosa at Station 
209 (near Zebu, one of the Philippines), January 22, 1875 ; lat. 10° 14' N., long. 
123° 54' E.; depth, 95 fathoms; bottom temperature 7l°'0, surface temperature 81°‘0; 
blue mud. 
A minute species, quite pale, and measuring in its somewhat imperfect condition 
about 5 mm. in length, and including the bristles fully 2 mm. in breadth. 
The head (PL IV. fig. 5) is characterised by the presence of four very distinct 
brownish eyes. The first pair occupy the lateral region about the middle of the 
head, while the second occur at its posterior border. The palpi are somewhat short, 
smooth, and attenuated at the tip. The antennse, tentacular and dorsal cirri are all 
smooth, tapering jDrocesses. The latter (dorsal cirri) have slender fihform tips. The 
ventral cirri are subulate and smooth, the extremities reaching considerably beyond the 
setigerous lobe of the foot. 
The scales are translucent, slightly milky structures, perfectly smooth all round the 
margin, and by transmitted light only showing a few distinct processes between the scar 
for attachment and the anterior border. The whole area is covered by branching nerve- 
fibres issuing from the scar. The scales are proportionally large, and appear to overlap 
in the middle line of the dorsum. 
When fully formed the foot bears dorsally a very long cirrus, which tapers in a filiform 
manner from base to apex. If folded backward, the organ, throughout the anterior 
^ Bidrag til Kimdskaben om Christianiafjordens Fauna, iii., 1873, p. 7, Tab. 14. 
