210 THE SCHIZOPODA. 
The eyes are of moderate size, with the eye-stalks short.— The antennular 
peduncles are somewhat short and in adults very thick (Plate 4, figs. la and 1b); 
in a little more than half-grown specimen much more slender (fig. 1c). Seen 
from the side (fig. 1a) the distal upper part of the first joint is raised as a high 
and thick, vaulted, setose roof above the insertion of the second joint; seen 
from above (fig. 1b) the same distal part is produced forwards as a short triangle 
with the inner angle acute, but without any process or armature; on the outer 
margin of the joint a somewhat small, oblong process is seen. The second 
joint in the adult has, seen from the side (fig. la), its distal half considerably 
vaulted above; seen from above (fig. 1b) its breadth is as long as its inner margin, 
while distally and a little nearer the outer than the inner margin it is produced 
forwards in a triangular, acute lobe considerably broader than long and with 
its end pointing outwards and especially forwards. Third joint in the adult 
with the distal part of the upper margin considerably arched, rounded, but 
the dorsal crest is not well defined. In considerably smaller specimens the 
vaulting of the distal parts of the joints is much less developed (fig. le) — The — 
antennal squama reaches the middle of third antennular joint and has a distinet 
triangular tooth at the outer distal angle; the spiniform process from the outer 
end of the peduncle is scarcely one fourth as long as the squama. 
The maxillulae (Plate 4, fig. 1d) are in the main intermediate between those 
in T. tricuspidata and in the following forms. The proximal lobe is consider- 
ably smaller than in 7’. tricuspidata and somewhat angular at the inner distal end; 
the distal lobe is much broader than the proximal, a little widened towards the 
terminal margin which is slightly convex; the palp is somewhat longer than the 
distal lobe, narrow, between three and four times as long as broad and tapering 
beyond the middle. The pseudexopod is a little broader and distinetly longer 
than in 7. tricuspidata, but not reaching much beyond the proximal angle of 
the insertion of the palp. 
The lateral plates of the five anterior abdominal segments are broad and 
deep; those of second to fourth segments with the lower margin a little irregu- 
larly emarginate; fourth and fifth segments each with a dorsal spiniform den- 
ticle; sixth segment uncommonly short and deep. The inner ramus of the 
uropods conspicuously shorter than the outer which reaches a little beyond 
the tip of the telson.— Telson has in Sars’s type seven pairs of dorsal spines 
(it is mutilated in my adult specimen). 
The copulatory organs (Plate 4, figs. le-1h) show some peculiarities. The 
spine-shaped process (p'.) is moderately curved. The terminal process (p*.) 
