PYCNOGONIDA. 65 



This species in general appearance very closely resembles the last, but may 

 1)0 readily distinguished by its spiny character and the features quoted above. 



The Body is quite smooth, the ccphalon short and without any constriction 

 indicating a neck. 



The Ocular tubercle is stout, with four well-developed eyes, the anterior pair 

 being larger than t the posterior pair. Above the eyes the tubercle is acutely conical. 



The Proboscis is half as long as the body as indicated in the specific characters, 

 and besides the median row of spines there is a lateral row of a few, widely 

 separated. The proboscis is movably articulated to the body, and obtusely pointed 

 distally. 



The Abdomen is small, somewhat clavate, but presenting no special feature. 



The Palps arise on the ventral side of the body, as close as possible to the 

 proboscis. They arise on a process of the body which is usually regarded as the first 

 joint, but which has always appeared to me to be doubtful whether it is a real joint or 

 not. In this particular species it is definitely a body-process and not a true joint. 

 The succeeding joint, here as elsewhere called the second, is very short, a mere ring- 

 like segment. The third is considerably the longest joint of the appendage, slender 

 and furnished with a few prominent curved spines ; the fourth is quite small ; the 

 fifth is two-thirds the length of the third ; and a short distance from the distal 

 extremity there is a distinct constriction as though there had been a joint there and 

 it had fused ; the sixtli is short, and the seventh is about half as long again ; the 

 eighth joint is very short, scarcely half the length of the sixth ; the ninth is fully 

 twice the length of the eighth, and the terminal one a little longer, rounded at the 

 extremity. From, and including the fourth joint, the entire organ is covered with 

 minute spines, too plentifully distributed to assert any regular disposition. 



The Ovigers arise laterally from two body-processes close to the middle line and 

 immediately behind the proboscis (fig. 4). The first three joints are very small and 

 sub-equal in length ; the fourth and sixth are very long and sub-equal, the fifth being 

 about one-third of their length; of the four terminal joints, the proximal is the 

 largest. The claw is of moderate dimensions. The entire appendage is covered with 

 very minute spines, which become numerous from the fourth joint, and appear to be 

 v<Ty generally distributed. The characteristic spines of the four terminal joints are 

 limited to four rows with an occasional small spine which may perhaps be regarded 

 as the remnant of a fifth row. It is unfortunate that in the oidy specimen obtained 

 (Plate X., fig. 7) these spines are very much worn. An interval separates the two 

 first rows, and another interval separates the second row from the remainder. 



The spines of the first row are long, slender and fe\v in number. They have 

 a somewhat stout base which, as far as can be judged without cutting sections, 

 appears to be rounded on one side and flattened or somewhat concave on the other; 

 they are constricted in the middle, and produced onwards as a flat blade with dentate 

 margins. The spines of the second row arc smaller, twice the number, and placed as 



