IOT 
truncate distal margin concurrent with the base of the short, 
strongly-spined seventh joint. 
In the third maxillipeds the second joint is externally coa- 
lesced with the following composite joint, both being hairy at 
the dehiscent inner margins ; beyond the bulbous base of the 
third joint these organs are very slender, and in one specimen 
membranaceous, the fifth joint two-thirds the length of the 
terminal, the latter beset with oblique little rows of sete, and 
its apex doubtfully separate as a seventh joint ; the fifth and 
following joint or joints are together shorter than the composite 
third and fourth. These and the five following pairs of appen- 
dages are supplied with branchiae. 
The first peraeopods are slender, the fifth jomt longer than 
the fourth, which in turn is longer than the third, this about 
equalling in length the chela ; the thumb and finger are much 
shorter than the palm, and have their tips hidden together in a 
bush of sete. 
The second peraeopods at full stretch, which in preserved 
specimens they resist being, are much longer than the first. 
In one member of the pair, left or right as the case may be, 
the limb is slender and partly membranaceous from the second 
joint onwards, the fourth joint long, a little longer than the 
third, the fifth nearly equal to those two combined, forming 
four articulations, of which the first is rather more than thrice 
as long as the rest together, and the fourth is two or three 
times as long as the two small intermediate ones combined ; 
the chela is less than half as long as the first of these four, 
of the same pattern as in the preceding pair, but larger. The 
other member is extremely different in appearance, although 
the structure is almost precisely similar to the end of the first 
articulation of the fifth joint; this elongate slender piece is 
accommodated in a slightly hollowed expansion in the distal 
two-thirds of the great sixth joint, with which it is connected 
by the three articulations still to be accounted for; two of 
them form a sharp bend, and the last a small cup-shaped 
wrist, enabling the fifth and sixth joints to lie close together 
almost as if they were one piece. The inter-locking is helped by 
a sub-distal and two distal teeth on the second, and a distal 
one on the fourth articulation, not shown in the figure, as they 
only come into notice when the fifth and sixth joints are 
drawn asunder. As in the other member of the pair, the fifth 
joint also here folds closely against the fourth, which is slightly 
grooved, and has the margin in part feebly tuberculate. The 
large hand, though of considerable width at the middle, and 
sometimes much wider than in the specimen figured, is much 
B, 649 G 
