430 
ZOOLOGY OF THE FAR EAST. 
The third and fourth thoracic hmbs (fig. 7) are of essentially the same form as the 
second, somewhat longer, with the carpus longer and more developed and the 
propodus not so much expanded. 
Fifth thoracic limb (fig. 8) quite short, not much more than 2/3 of the length of 
either the fourth or sixth thoracic limbs, without a dactylus, with a clothing of fine 
hairs on the outer margins of all the joints, and groups of strong spines on the 
merus, carpus and propodus. Sixth to eighth thoracic limbs (fig. g) increasing 
successively in length and of the form shown in the figure. In the eighth thoracic 
limb the carpus is about equal to the propodus, not quite twice as long as the 
dactylus. All the joints bear a fringe of fine hairs on the outer margins and the 
propodus and carpus several groups of strong setae. 
The distal part of the uropod is shown in fig. 10. The endopodite alone is 
present and on the outer distal corner of the ba.sal joint there is a strong and 
long plumose spine. 
Second pleopods of the male (fig. 11) with an appendix masculina about equal in 
length to the branches, suddenly narrowing near the tip to an acute apex. 
Length of an adult female, 13 mm. of an adult male, 12 mm., and of an imma- 
ture male, 10 mm. 
This interesting species, which I have great pleasure in associating with its 
discoverer, may be distinguished at once by the shape of the posterior end of the 
metasome. No other species assigned to the genera Zenohiana, Cleantis or Cleantiella 
is at all like it in this respect. It is also unlike the majority of species of these 
genera in not having the body of equal width throughout. It agrees with Cleantis 
japonica and C. planicauda in the maxillipedes and in the segmentation of the pleon, 
but both these species have parallel-sided bodies and evenly rounded extremities to 
the metasome. 
The short fifth thoracic limbs suggest a similarity in habit to the tubicolous 
forms of the above three genera, but the shape of the body is hardly that of a 
tubicolous species. The minute terminal second joint of the peduncle of the second 
antenna is a feature which is probably common to other species though not so far 
noticed. 
Sub-order Oniscoidra. 
Family LIGIIDAE. 
Genus Ligia, Fabricius. 
Ligia exotica, Roux. 
L. exotica, QhiXton, 1916, p. 462, text-figs. 1-22. 
Locality :— Station 22, Tale Sap, on shore of channel between Koh Yaw and 
mainland, two males, ^8 mm. 
Chilton in the memoir cited above has redescribed and figured this species very 
completely and I have nothing to add to what he has written. 
