50 
PACIFIC SCIENCE, Vol. V, January, 1951 
I 
II 
III 
IV.. 
Tibial Index 1 15.8 
PATELLA 
FEMUR 
AND TIBIA 
METATARSUS 
TARSUS 
TOTAL 
0.43 
0.46 
0.26 
0.30 
1.45 
0.38 
0.43 
0.22 
0.30 
1.33 
0.31 
0.31 
0.16 
0.22 
1.00 
0.42 
0.42 
0.24 
0.25 
1.33 
Tibia! Index IV 14.3 
Three claws, the third as large as the dorsal 
pair and sharply directed downwards. Claws 
slender and not pectinated, and pectinated 
bristles not present. No spines, but a large 
erect bristle at the distal end of each patella, 
two smaller ones on tibia I and one on tibia 
II. One trichobothrium on metatarsi I and II, 
three on tibiae I and II, two on tibia III, and 
four on tibia IV. 
Abdomen: Length 1.16 mm., breadth 0.80 
mm. Pear-shaped, projecting behind in a 
knob-ended process and provided with a pair 
of similar dorso-lateral processes. The six 
spinnerets are ventral, the anterior being the 
largest. No colulus. Anal tubercle large. The 
epigyne is visible only when the abdomen is 
removed. There is a transverse fold overhung 
by a backwardly directed lip whose edge is 
dark and thickened. The appearance of a 
cleared specimen is shown in the figure. 
In specimens cleared in potash the spiracles 
could be seen leading into an atrium from 
which numerous tracheal tubes supplied both 
the cephalothorax and abdomen. There was a 
transverse connecting tube between the atria. 
Sections showed five pairs of tracheal tubes, 
three large and two small, passing through 
the pedicel into the cephalothorax. 
Web and Coccoon: The webs were spun in the 
irregularities of a fallen tree trunk. They con- 
sisted of a very fine horizontal sheet with very 
regular meshes. The sheet was an irregular 
polygon some 6 centimeters long, and an 
oblique thread extended upwards from the 
sheet between 1 and 2 centimeters from one 
end. The threads of the sheet radiated from 
Fig. 2. Patu samoensis: a, female, dorsal view; b, female, left side; c, female chelicera, dorso-retrolateral view; 
d, female, eyes, dorsal view; e, female apparatus as seen in a cleared skin; /, female, anterior view of carapace and 
chelicerae. 
