PYCNOGONIDA— CALMAN. 



65 



and in tlie abbreviation of the terminal segments of the palp. Of less importance is 

 the absence of two characters included by Bouvier in his definition of Achelia, but by 

 no means conspicuous in some species of that genus— namely, the prominence which 

 bears the opening of the femoral cement-glands and that which carries the genital 

 opening in the male sex. On the other hand, the form and position of the proboscis 

 and the general aspect of the animal are quite those of Austroraptus, although it differs 

 from both the other species in the number of palpal segments and the very compact 

 form of the body. 



A'ustroraptu.^ jjrcecoa-, sp. n. (Text-fig. 19). 



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



Description. — Boch/ compact, the lateral processes in contact at their bases, 

 diverging a little distally ; first intersegmental articulation distinct, second less so, 

 third marked only by a groove. Cephalon nearly twice as wide as long, with a pair 

 of spur-like antero-lateral tubercles. Ocular tubercle much taller than wide, inclined 

 forward, conical apex above eyes nearly as long as basal part. Lateral processes each 

 with a pair of conical dorsal tubercles, of which the posterior is the larger. 



Proboscis directed obliquely downwards, not more than half as long as trunk, 

 cylindrical in its basal half, then conical with a very narrowly truncate apex. 



Abdomen elevated, sub-cylindrical, about half as long as trunk. 



Chelophores with scape hardly longer than wide, with a pair of dorsal tubercles on 



Fig. 19. — Austroraptus prsecox, sp. n., Male. A. Dorsal view of body with chelophores and first and 

 second coxse. B. Lateral view of body with chelophore, palp, and oviger. C. Chelophore, 

 further enlarged. D. Leg. E. Terminal part of leg. 



its distal margin, the outer tubercle the larger. Chela completely formed, palm as 

 long as broad and a little longer than the fingers, which are straight and meet along 

 their length, crossing only at the very tips. 



VOL. III. 



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