OF THE SIBOGA-EXPEDITION. 137 
Iridometra (Eumetra) aphrodite, sp. nov. 
The centrodorsal is low hemispherical, about 2.9 mm. 
in basal diameter, almost completely covered with cirrus 
sockets; the small dorsal pole is papillose as in J. (£,) 
chamberlain. 
The cirri are XXXV—L, 16—18, 18 mm. long; the 
first segment is very short, the second about twice as broad 
as long, the third nearly or quite as long as the proximal 
diameter, the fourth two or two and one half times as 
long as the proximal diameter, the fifth-seventh the longest, 
nearly or quite three times as long as the proximal dia- 
meter; the following very gradually decrease in length so 
that the antepenultimate is from one third to one half 
again as long as broad; as a whole the cirri are not 
especially slender; they become moderately compressed in 
the distal half; the longer earlier segments are slightly 
constricted centrally, and all the segments have prominent 
overlapping distal ends; the shorter distal segments have 
the proximal dorsal angle cut away, so that the distal 
dorsal angle of the preceding appears prominent; the cirri 
do not taper distally. 
The division series and brachials resemble those of J. (£.) 
chamberlaini; the distal intersyzygial interval has three 
oblique muscular articulations. 
The ten arms are about 75 mm. long. 
P, is 5.5 mm. long, evenly tapering from the base to 
the delicate tip, with eleven or twelve segments of which 
the first is not quite so long as broad, the second is about 
as long as broad, the third is half again as long as broad, 
and the remainder are about twice as long as broad; 
the pinnule is slightly stiffened; P, is 7 mm. long with 
fifteen segments of which the first is twice as broad as 
long, the second nearly as long as broad, the third one 
half again as long as broad, and the remainder about 
twice as long as broad; the outer segments have slightly 
prominent distal angles and slightly spinous distal ends; 
Notes from the Leyden Museum, Vol. XXXIV. 
