4.70) ONISCID. 
with a strong curved bristle, acute at the tip. The inner 
maxilla are very delicate, and almost membranous, 
oblique at the tip, with two curved setose bristles, the 
base armed with two remarkable muscles. ‘The outer 
maxillz are narrowly oblong and rather curved, setose 
at the outer margin, and spinose at the tip; the foot-jaws 
are oblong, rounded on the outside, the external base 
armed with a strong triangular lobe; the apex is divided 
into two parts, the inner of which terminates in several 
small teeth, and the outer in a movable finger-like lobe, 
articulated at its base. 
The legs are all cursorial, and are terminated by a foot 
having a small tooth on the inside. 
The branchial appendages on the underside of the 
tail are arranged in pairs, the inner angle of the apical 
margin being more or less extended backwards ; moreover, 
in the males, the second pair of these appendages are 
furnished at their base with a long style, dilated at its 
base, pointed, and slightly curved at its tip. The ter- 
minal pair of these limbs form the exserted biarticulated 
appendages seen on either side of the acuminated ter- 
minal joint of the tail; the two divisions of the last 
pair are nearly equal in length, the middle of the 
outer division extending to the tip of the tail. The 
internal accessory lobe of the basal portion is slender, 
and extends rather beyond the tip of the last joint of 
the tail. 
The general colour of this species is of a light greyish 
brown or slaty lead, marked with blotches and spots of 
yellowish white or buff, of which the most conspicuous 
form a regular row on each side, parallel to the lateral 
margins of the segments, the margins being also pale 
with a dark spot; the dorsal spots are less distinct: a 
salmon-coloured variety, with dark patches, is stated by 
