147 
these appendages, to be the first pair of trunk-legs, the lateral legs would then make the 
second pair. The proximal part of the first pair of trunk-legs being incomprehensible to 
me, [I must content myself with referring to fig. 2g, which is drawn as accurately as pos- 
sible; the distal part is a rather short and broad joint divided at the posterior outer angle 
by a rather deep incision into two unequal processes, the outer one of which is conical and 
ends in a shorter seta, while the inner one is broader and is cut off posteriorly in a straight 
line, bearing on its end a small joint which terminates in a pretty long seta, of more than 
half the length of the basal joint of the maxilliped. The second pair of legs resemble the 
distal part of the first pair, but their outer process (outer branch?) is shorter, with the terminal 
seta somewhat longer, the inner process lacks the small joint, whereas its seta is a little 
shorter than in the first pair of legs. Each of the caudal stylets is a tap ending in a pair 
of conspicuous, though not long, sete, besides having a short seta proceeding from an angular 
expansion on the outside at the base; each stylet is a direct prolongation of a long, anteriorly 
somewhat expanded, prominent list, which runs forward towards the base of the trunk. The 
caudal stylets, the distal part of the first pair of legs and the second pair of legs are situated 
almost on the same transverse line. 
OVISACS. They are pretty small, mostly somewhat flattened, their circumference 
varying between a circular and a very oval shape; the specimen represented in fig. 2 ¢ is 
‘72 mm. long and scarcely more than half as broad. As many as fifteen ovisacs may be 
found in one female. The eggs of medium size, not numerous. 
LARVA. The body of a specimen (fig. 2i) which had just attached itself, is *25 mm. 
in length. It deviates very much from all the other known larvee of the genus, and partly 
of the family, in its extremely short antenns, its long and very slender maxilla and maxilli- 
peds, its slender natatory legs and very slender abdomen. The front without lists, in the 
specimen figured it is covered throughout its whole breadth by the viscous substance which 
attaches it to the host. Antennule 2-jointed, olfactory seta rather long, about three fourths 
the length of the cephalothorax. Antenne extremely short, almost rudimentary, 3-jointed, 
with a proportionally thick, but very short, seta on the penultimate joint, and an exceedingly 
short terminal seta. Mouth very large. Of the maxillule I have discovered three very fine 
branches, the anterior one moderately long, the two others a little shorter. Maxille long 
and very slender, the basal joint, in particular, is comparatively very long and extremely 
slender; all joints smooth. Basal joint of the mavxillipeds long and very slender, second 
joint unusually long, and considerably longer than the third one. The posteriorly free pouch 
on the ventral side of the cephalothorax small and very short. The second section, the free 
segment, of the cephalothorax proportionally much smaller than in other species. Peduncle 
of the natatory legs unusually slender. Abdomen considerably more slender than in other 
species; the long seta projecting from the posterior angle of the first segment, is more than 
double the length of that part of the abdomen which is posterior to the point where this 
seta projects, the second somewhat shorter seta is also unusually long. Second segment a 
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