128 
Psyche 
[December 
segment with one transverse row of long ciliate setae, in 
front of which are three smooth short setae. 
Abdomen sparsely clothed with setae of all types, tending 
to form irregular transverse bands over the median por- 
tions of abdominal segments one through four, and being 
more uniformly scattered and somewhat more dense on 
segments five and six. 
Legs comparatively densely setaceous, a single longer 
pointed seta usually present externally just above the claw. 
Claw long and narrow, with a single internal tooth about 
midway between the base and the tip, and a smaller, more 
basad pair of lateral teeth ; no external teeth present. 
Unguiculus with a broad, internal, basal lamella, and a 
sharp, pointed apical prolongation extending to beyond 
the level of the internal tooth. 
Furcula with all segments distinct. Manubrium ventral- 
ly and dentes internally not as coarsely granulate as re- 
mainder of body. Manubrium naked ventrally, and sparsely 
clothed dorsally with short smooth setae, except for a 
medio-distal triangular unsetaceous area, and a single long 
seta at each basal lateral corner. Dens ventrally naked, 
dorsally with seven setae, the basal and subapical ones 
being about twice as long as the others. Mucro tapering, 
slightly expanded at the tip, with the central part of the 
mucro dorsally granulate. A thin lamella is present on 
either side of the mucro along the apical three-fourths of 
the structure. Internally the lamella is a flatly arcuate 
structure. Externally the lamella is much higher for its 
basal half and then abruptly narrows to the size of the 
inner lamella. 
Tenaculum quadridentate and lacking setae. 
Anal spines two, about three-fourths as long as hind 
unguis, slightly curved and situated on high separate 
papillae. Anal spines plus papillae longer than hind unguis. 
Variation 
The most striking variation in this species is in the 
number of lobes in the P.A.O. being quite commonly three 
on one side and four on the other, as in the holotype. Other 
specimens have an equal number (three or four) on either 
