104 
MR. W. R. BROOKS OR LUCIFER: 
appendage, and it carries four terminal hairs, two of them about as long as those on 
the terminal joint of the shaft, and two nearly three times as long. 
The second antenna is the chief locomotor organ, and (as shown in fig. 77, An) it 
consists of a thick two-jointed basal portion, which carries a two-jointed exopodite (ex) 
and a ten-jointed endopodite fen). 
The proximal joint of the exopodite is about twice as long as the terminal joint, and 
it carries two long hairs on its outer end, and two more near the base. The terminal 
joint has, at its tip, one short hair, and four which are about as long as the limb. The 
endopodite consists of four short rings, and a series of six joints like those of the 
corresponding organ of the Ncmplius, JProtozoea , and Zoea of Lucifer . The terminal 
joint carries four, and each of the five other joints one long swimming hair, and none 
of these hairs are plumose. 
On the basal portion of the appendage there is a large bright-red pigment-spot, 
which forks and runs along the exopodite and endopodite, about half way to their 
tips. 
The labrum (fig. 77, L) is smaller than that of Lucifer , with a spine and a large red 
pigment-spot. 
The mandible (fig. 77, M, and fig. 80) has small irregular denticles along its cutting 
edge, and these reach to the tip of the long tooth which occupies the posterior angle 
of the blade. The mandibles of two specimens were dissected out, and in each case 
there was a little hairy pad (m) upon the posterior surface. It could also be seen 
in the entire animal (as shown in fig. 77). It is possible that this pad is the man¬ 
dibular palpus, but it seems much more probable that it is half of the lower lip or 
metastoma, for no palpus is present on the mandible of Lucifer. 
The first maxilla (fig. 77, Mx. 1 , and fig. 81) is quite different from that of Lucifer 
(fig. 46) at the same stage, but the difference is in minor points, and there is essential 
agreement in general structure. The two basal joints or blades are long and slender, 
and their hairs are also longer and thinner than they are in Lucifer. The endopodite 
(en) is placed nearly at right angles to the base, and is distinctly three-jointed. It 
carries five hairs as it does in Lucifer, and they are similarly placed, but longer. The 
three hairs on the scaphognathite are about equal in length, and the plumules on 
their sides are short and irregular. 
The second maxilla (fig. 77, Mx. 2, and fig. 82) is much like that of the Lucifer 
Zoea (fig. 47), but the three hairs at the tip are more than twice as long as those on 
the inner edge of the appendage, and they are irregularly plumose, while they are 
simple in Lucifer. 
The first maxilliped (fig. 77, Mp. 1 , and fig. 83) differs from that of Lucifer (fig. 48) 
in the same way, and the exopodite carries seven instead of four hairs, and these are 
as long as the appendage, and two-jointed. 
The second maxilliped (fig. 77, Mp. 2) is about as long as the first, but it does not 
seem to be of much functional importance. It is usually carried stretched back along 
