PYCNOGONIDA. 
21 
neck; anteriorly it is muck expanded, the two lobes being separated by a small but 
conspicuous groove. 
The Ocular tubercle is situated immediately in front of the first lateral 
processes ; it is comparatively stout, short, truncate, and bears four well-developed 
eyes without any pigment. 
The Abdomen is small, ovoid, does not project beyond the last pair of lateral 
processes, and is not articulated to the trunk. The length of the body is 7 ■ 5mm. and 
its width is almost 4mm. 
The Proboscis is cylindrical, smooth, and directed obliquely downwards ; it is 
about 3mm. in length. 
The Chelifori are well developed. The scape is as long as the proboscis, slightly 
curved and sparsely covered with minute setae ; the distal fringe is not conspicuous. 
The chelae are also curved, half their length being taken up by the palm, which 
is finely setose, the setae extending on to the base of the immovable finger. The 
fingers are slender, much incurved at the tip. The teeth are numerous and regular 
in size, not so closely set in the immovable finger as in the other. 
The Palp is slender, five-jointed, and rises at the side of the proboscis below the 
chelifori (fig. la). The first joint, as usual, is very small; the second is the longest of 
the appendage, slightly swollen distally, and sparingly covered with minute setae. The 
third joint is but a little shorter, rather stouter, and more liberally supplied with 
short setae, though these are still scanty. The fourth joint is scarcely half as long 
as the second, very richly supplied with short setae on its ventral margin, much 
more sparingly dorsally. These three joints have a well-defined distal fringe. The 
terminal joint is nearly half as long again as the preceding and, like it, richly clothed 
with short setae ventrally, more sparingly dorsally. 
The Oviger is ten-jointed, and arises ventro-laterally in front of the first lateral 
process on a prominent body-process, the position of which is clearly seen from the 
dorsal surface (fig. lb). The first three joints are small and stout, the third 
curved and having a very oblique termination; only a distal fringe of very 
small setae can be detected on these joints. The fourth joint is very long, slightly 
curved, with very few minute setae besides the distal fringe. The fifth joint is 
much the longest of the appendage, and is thinly covered with very small setae, 
with a more strongly marked distal fringe. The sixth joint is little more than 
half as long as the preceding, slightly curved, and thickly clothed with small 
stiff setae on its outer side and a well-developed distal fringe. The four terminal 
joints are long, progressively decreasing in length, but the last two are sub-equal. 
All are more or less well supplied with short stiff setae dorsally and a distal fringe 
of rather longer setae. The terminal claw is long and slender, with about fourteen 
curved teeth. The denticulate spines are long, and in the specimen critically 
examined occur 13: 10: 10:9 on the various joints. (Plate X., fig. 8.) The shaft is 
flattened and slender, and carries eight to ten teeth on each side ; the third or fourth 
