106 MR. W. K. BROOKS OK LUCIFER: 
The first antenna (fig. 84, A) consists of a three-jointed shaft about as long as the 
carapace, and two terminal flagella. The basal joint of the shaft makes half the total 
length of the appendage, and the other two are about equal to each other. On the 
inner edge of the distal two-thirds of the shaft there are eight long, similar equidistant, 
plumose hairs, and there are two short spines on the outer edge. The inner flagellum 
is short, and carries one long slender terminal hair. The outer one is more than twice 
as long, and carries two thick sensory hairs. 
The exopodite of the second antenna (fig. 84, ex) has become a scale, only one-third 
as long as the endopoclite, which is now a ten-jointed flagellum about as long as the 
carapace. 
The second and third maxillipeds (fig. 84, Mp. 2 and Mp. 3) and the first, second 
and third pereipods (fig. 84, T 1, T 2, and T 3), are Schizoped-like, but they are of very 
slight functional importance, and their endopodites are folded forwards on the ventral 
surface, like the maxillipeds of Squilla, so that it is impossible to study the mouth 
parts without dissection. The endopodite of the fourth pereiopod has entirely 
disappeared, and the limb is represented only by its exopodite. The five exopodites 
are about alike, and they all end in long slender swimming hairs : those of the four 
pereiopods (T 1 ex, T 2 ex, T 3 ex, and T 4 ex) are bent outwards and upwards towards 
the dorsal surface, as in the maxillipeds of a Crab Zoea, but those of the second and 
third maxillipeds (Mp. 2 ex and Mp. 3 ex) are more nearly parallel to the endopodites. 
The endopodite of the second maxilliped (Mp. 2) is free and movable, but those of the 
third maxillipeds (Mp. 3) and of the first, second, and third pereiopods are covered by 
a delicate cuticle, and are almost immovable. 
I did not actually witness the next moult, but four days later the larva, To oM inch 
long, was in the stage shown in fig. 85. The exopodites of the thoracic limbs have 
become reduced to rudiments, the limbs themselves have stretched out and are now 
functional, as are the three pairs of abdominal feet. 
The first antenna (fig. 86) has not changed much, but its base is swollen and the 
otocyst has appeared. 
The second antenna is now half as long as the whole body, its flagellum is ten- 
jointecl, and red pigment has appeared at its base and tip (fig. 87). The outer end of 
the scale carries nine long plumose hairs arranged on the tip and inner edge. 
The second maxilliped (fig. 88, Mp. 2) is bent into a knee, and is fringed by sixteen 
plumose hairs. Its exopodite is rudimentary, but longer than in any of the appendages 
which follow. 
The third maxilliped (fig. 88, Mp. 3) is long, slender, six-jointed, with a rudimentary 
endopodite. 
The other three limbs (fig. 88 , T 1, T 2, T 3) are six-jointed and they end in enlarged 
chelse. The first is the shortest; the second is about as long as the third maxilliped, 
and the third is still longer. The fourth is now represented only by a small rudiment 
and a ganglion; and the fifth is entirely absent, as it has been at all stages. 
