Report on the zoological collections made in the Indo-Pacific Ocean ...

;PYCNOGONIDA. 325the ovigerous legs, Maudibles 2-jointed, the chelate terminal jointinserted not laterally, but at the distal extremity of the precedingjoint. Ovigerous legs 10- jointed. The legs (but not the mandibles)are armed with strong conical spines, and bear two long axixiliaryclaws besides the normal claw.Length of the rostrum, a little over2 millim.Length of the body (without rostrum and abdomen)nearly 3 ,,Length of the abdomen about 1"5 „Length of leg of the first pair about 21 ,,The body is moderately robust (as in P. Jluminense), with the legbearingprocesses nearly in contact at their bases ; the articulationsof the segments of the bodj^ are discernible only ou the ventralsurface. The cephalothoracic segment is about as long as the threefollowing segments taken together, and of these latter the first is alittle shorter than the second or third. The proboscis, as in P.insir/iie, is inserted ventrally, far back between the bases of the twoovigerous le s, and, as in that species, is very slightly swollen at thebase, in the middle, and at the distal extremity ; the mouth is smalland triangulate, and is margined by three slight protuberances.The abdomen is slender, longer than in P. insigne, and directedupwards.The oculiferous tubercle is conical, subacute, with four dark eyes.Immediately behind it the cephalothoracic segment is marked by amedian longitudinal depression, extending along nearly its wholelength. The basal joints of ttie mandibles are but slightly divergentand extend considerably beyond the front of the proboscis ; theyhave no indication of the acute process characteristic of P. insigneand bear the second joints, which are about half as long as thefirst, at their distal extremities ; the pincers are smooth on theirinner surfaces. The basal joints are nearly glabrous. The secondjoints and the pincers at base are clothed with fine hairs, whichare most abundant on the under surface of the second joint.The ovigerous legs are inserted on either side of the base of theproboscis and are 10-jointed ; the first and third joints are short,the second a little longer, the fourth and fifth still longer and of nearlyequal length, but the fourth is somewhat thickened, the sixth aboutas long as the second, the seventh to tenth small, the tenth minutethe last five joints are clothed with fine hairs.The first joint of the legs is small, nearly as long as the lateralprocess, the second more than twice as long as the first, the thirdabout half as long as the second ; the fourth is about as long as thethree preceding joints taken together ; the fifth slenderer and alittle longer than the fourth ;the sixth also slenderer and about aslong as the fourth ;the seventh is very short ; the eighth slightlycurved and longer than the first, but not as long as the second joint.The first joint of the leg bears, at the distal extremity of its uppersurface, one or two small conical spinulcs or protuberances, and at the