PYCNOGONIDA-CALMAN. 63 



Eemarks.— As the figures of this species in Mr. Hodgson's report are not altogether 

 satisfactory, I give some additional figures prepared from the female syntype. The 

 male hardly differs except that the ocular tubercle is taller and more slender. The 

 relative lengths of the long segments of the leg differ a little even in the legs of the 

 same individual. The male has genital apertures on the last two pairs of legs only, 

 not on the last three, as stated in the original description. The female syntype has 

 apertures on all the legs except the second on the right side ; this is evidently an 

 abnormal condition, and the " Terra Nova " specimen has apertures on all the legs. 



A young specimen, with chelate chelophores, is referred to this species rather than 

 to either of the two following, chiefly because it has the lateral processes separated to 

 the base and the spurs on the lateral processes and first coxse long and acute. It 

 differs from the adult in having the ocular tubercle produced above the eyes into a 

 long slender apical cone which is longer than the basal part (as in young specimens of 

 Achelia in the present collection) ; the proboscis is more produced at the tip than in 

 the adult ; the fingers of the chelae are strongly arched and gaping. The most 

 important character, however, is that the terminal portion of the palp, corresponding 

 to the terminal segment in the adult, is divided into two segments in the palp of one 

 side and into three in that of the other. This makes it very probable that the young 

 of A. polaris, like the adults of Achelia, have the palp composed of eight segments, 

 and the retention of this feature in the adults of A. juvenilis, described lielow, need not 

 be regarded as a generic distinction. 



Austroraptus juvenilis, sp. u. (Text-fig. 18). 



Occurrence. — Station 220, off Cape Adare, 45-50 fathoms ; 1 $ ovig. (Holotype), 



1?. 



Description. — Body compact, the lateral processes in contact for almost the whole 

 of their length, intersegmental lines marked only by superficial grooves. Cephalon 

 about twice as broad as long, inflated laterally and with convex anterior margin ; 

 antero-lateral tubercles very small. Ocular tubercle stout, much taller than wide, 

 inclined forwards, the blunt apical cone above the eyes shorter than the basal part. 

 Lateral processes each with a broad rounded tubercle near the posterior distal corner 

 and a more or less vestigial anterior tubercle. 



Proboscis directed almost vertically downwards, slightly inflated a little beyond 

 the base, then acutely conical with a minutely truncate apex. 



Abdomen elevated, clavate, about half as long as trunk. 



Chelophores with scape about twice as long as wide, slightly expanded distally. 

 Second segment irregularly globose. 



Palp a good deal stouter than that of A. polaris, similarly bent at the fifth 

 segment, but having the distal part, which corresponds to the terminal segment of 

 A. jjolaris, divided into three short but very distinct segments, so that the whole palp 

 consists of eight segments. • - 



