PYCNOGONIDA. 
55 
The Cephalon is considerably enlarged, and almost completely fills the interval 
between the first pair of lateral processes. 
The Ocular tubercle is stout and tall, terminating in a cone above the four 
well-developed eyes. It lies well to the front of the cephalon. 
The Abdomen is long, cylindrical, almost horizontal, and not separated from 
the body by an articulation. The extreme length and breadth of the trunk is as 
6 to 5'5, the abdomen increasing the length to 7 '5. The articulation of the trunk 
is indistinct, that separating the last segment being non-existent. The entire body 
appears to be perfectly smooth. 
The Proboscis is about half the length of the trunk; it lies underneath the 
cephalon, directed obliquely downwards ; it is stout and cylindrical for the greater 
part of its length, tapering oft’ to a sharp cone. It is movably articulated to the 
trunk. 
The Chelifori are rudimentary; the scape is well developed, stout, not setose, a 
little longer than the cephalon ; the chelae are reduced to a knob, inclined inwards at 
an angle of about 45°, with only the merest traces of fingers. 
The Palp is short and only possesses six joints. It rises close to the proboscis, 
below and outside the chelifori (fig. 2a). The first joint is short and stout, and 
the second is three times as long; the third is again very small and, forming an 
elbow, is shorter on one side than the other. The fourth is the longest joint, 
though but little longer than the second, the only setae visible forming a small 
distal fringe. The following joint is characteristic; it is small, and its inner margin 
is just half the length of its outer border; this outer border is well supplied with 
setae distally. To the oblique termination of this joint the sixth and last joint 
is articulated. It is twice the extreme length of its predecessor and richly setose on 
its outer border and extremity. 
The Oviger is 10-jointed and rises ventro-laterally at the angle formed by the 
first lateral process with the cephalon (fig. 2b). It is a short appendage ; the first 
three joints are short and stout, the second and third are sub-equal in length, but 
not in diameter, and nearly twice the length of the first; the two following are the 
longest joints, the fifth being a trifle longer than the fourth and sparingly setose.; 
the sixth is short, the seventh is longer, and the three terminal ones progressively 
decrease in length and diameter, the last one being very small. The last five joints 
are sparingly supplied with setae. On the terminal joint there are three long and 
stout ones. There is no terminal claw nor are there any special spines. The oviger 
of the male has not been removed, but does not differ essentially. 
The Legs measure some 18 mm . in length. The second coxa is fully as long as 
the other two together, and is much enlarged distally. The femur and first tibia are 
sub-equal in length, and the second tibia is a very little longer; the tarsus and 
propodus together are rather more than one-third the length of the second tibia. The 
tarsus is very small and cup-like, richly setose ventrally, the setae being stout, one 
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VOL. III. 
