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of spines, then 4 spines, and on the maxilla of the other side 5 somewhat shorter spines, then 
two longer ones of the same size as those of the upper pair. The base of the middle-spines 
slightly overlap each other, these spines giving, in consequence, the impression of standing 
in two rows. The superior and inferior margins nearly parallel to each other. 
Outer maxillae (Pl. XX, fig. 5): the outer lobe of trapezoidal form, the triangular 
distal part being about the only one which is covered with hairs. Few hairs only form the 
longitudinal row which runs from the outer to the inner lobe. The latter has a rounded surface, 
and bears not very numerous feathered hairs along the inner and inferior margins. 
Note. The description of the parts of the mouth given above is for the specimen from Station 204. 
In one of the specimens from Station 289 the difference between the distances of teeth 
1 and 2, and 2 and 3 of the mandibles is greater, and tooth 4 is not developed in the 
mandible of the right side. The maxillae have 3 and 4 middle-spines; the outer maxillae 
have the outer lobe somewhat shorter and broader, and the hairs disposed towards the 
inner lobe are less numerous. 
Cirri. First pair. The cirrus of the one side has 7 and 11, that of the other 7 and 
12 segments; the inner face of the segments is rounded, but cannot be said to be protuberant. 
Second pair has nearly equal rami of 8 and 10 segments. 
Third pair has 10 and 11 segments in the two rami. Segments 2—g9 (Pl. XX, fig. 6) 
of the longer ramus, and 3—8 of the shorter bear well-developed groups of small, straight, and 
not recurved, triangular teeth along the inner face and between the spines on the distal half of 
that face. The teeth are situated on the face of the segments and at a little distance from 
the margin. 
Fourth-sixth pairs. Number of segments slightly increases from the 4 to the 6 
pair; the greatest number is not much over 20. Pairs of spines disposed on the inner face of 
the segments of the 4'* cirrus, four only; on some of the segments of the 5 cirrus and on 
most of the 6t (Pl. XX, fig. 7) this number, however, is five. The middle segments are twice 
as long as broad, the basal ones shorter, the distal ones longer; the very last one is, however, 
short and slender. 
Note. The cirri of the specimen from Station 289 correspond in general with this description. 
The number of segments, however, is smaller: the first cirrus has. 5 to 6 and 10 seg- 
ments, the second 7 and 8, the third 8 and 9, the fourth 16 and the sixth 19 segments. 
The teeth on the protuberant parts of the middle segments of the longer ramus of the 
3"! cirrus are present — but they are very small. Three or four segments only of the 
6 cirrus have 5 pairs of spines on their inner faces, all the others have at the most 4 pairs. 
Penis long, curled; few hairs only scattered over the surface, a little tuft of hairs 
situated at the extremity. 
This species was dredged by H. M. S. ‘“Siboga” at two different Stations: 
Stat. 204. Sept. 20, 1899. Lat. 4°20'S., Long. 122°58’E. Between islands of Wowoni and 
Buton; Northern entrance of Buton-strait. Depth from 75—-94 m. Bottom: sand 
with dead shells. The Balanus is attached to the tube of an Annelid. 
Stat. 289. January 20, 1900. Lat. 9°0'.3S., Long. 126°24'.5 E. Depth 112 m. Bottom: mud, 
sand and shells. Group of 3 to 4 small specimens. 
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