146 
median line; a narrow list is found between the maxillee; the whole skeleton is naked. The 
trunk entirely naked; trunk-legs wanting. The genital area (fig. 2f) deviates strongly from 
all other species; it is considerably larger than the head (fig. 2a) and much longer than 
broad. The solid chitine forms posteriorly a narrow semi-circle which opens towards the 
front, each branch dilating anteriorly on the internal side to a considerable breadth, after 
which both branches run on parallel a long way, at the same time gradually declining in 
breadth; the whole structure may also be described by saying, that there are two anteriorly 
pointed, posteriorly broader, mutually parallel lists, which again decrease in breadth in their 
hindmost part, converge, and at last join in a semi-circle. The somewhat curved genital 
apertures are situated at some distance from each other, so that their outer ends come close 
to the inner side of the semi-circle; their muscles run forward and a little outward towards 
the broadest part \of the lists, close in front of the foremost part of the semi-circle. (About 
the orifices of the receptacula seminis which are omitted in the drawing, see above on p. 14.) 
The whole area is naked, and caudal stylets are altogether wanting. 
MALE. The body, apart from the rostrum, is ‘18mm. in length; seen from below, 
it is ovate, only about one sixth longer than broad; the thickness in proportion to the breadth 
is almost like two to three; so it is exceedingly small compared with the female (fig. 2b: 
fig. 2a). It deviates strongly from all other species, and in spite of much study and long 
deliberation, I have been unable to understand all its details. Head and trunk of about 
equal size. The frontal border is not produced, its margin flatly curved, naked. Antennule 
long, without articulation, with sete of medium length. Antenne wanting. Rostrum unusually 
long, very broad at its base, and in the specimens found, strongly protruding, which gives 
it, when seen from below, the shape of a large, distally blunt cone, projecting considerably 
beyond the frontal margin. Maxillule as in the female. Basal joint of the maxilla some- 
what compressed, broad between the foremost and hindmost angles; the basal margin is 
long, and its acute posterior angle is further removed from the head than the articulation 
of the second joint; its outer side is armed with a pair of conical taps. Maxillipeds of 
medium length, the basal joint somewhat fusiform, on the inner and anterior sides some 
areas covered with numerous extremely short hairs; second and third joints coalescent, 
last joint pointed. The sub-median skeleton possesses only the first pair of processes, each 
of which being long, very slender and nearly setiform (fig. 2h, i), and being a prolongation 
of a list running inside the maxille. The lateral margin of the head is prolonged backward 
to the middle of the trunk, and it is provided with a stripe of rather short hairs which are 
situated more or less close together. The ventral surface of the trunk is for the most part 
covered with tolerably short hairs, many of which are arranged in transverse rows, whereas 
the back, the lateral surface and the hindmost extremity are naked. I have been unable to 
understand the basal parts of the trunk-legs, I cannot even make out with absolute certainty 
which pair are the foremost. I consider the narrow pair of appendages which are situated 
near the median line to be the caudal stylets, and the limbs which are seen a little outside 
