1032 ON THE PYCNOGONIDA OF THE AUSTRALIAN COAST, 



.Genus. PHOXICHILIDIUM. Milne-Edwards. 



PlIOXICHILIDIUM TUBIFERUM. N. sp. 



[Plate LVII., figs. 1-5.] 

 The body is rather elongate, the intersegmental lines indistinct. 

 The first segment constricted produced over the origin of the 

 proboscis. The proboscis is scarcely equal to half of the length of 

 the body, exclusive of the abdomen, notched at the extremity, 

 narrower than the following segments, rather broader at the base 

 than at the apex. The segments of the body have large lateral 

 processes widely separated from one another, and somewhat 

 constricted at the base ; those for the seventh pair of appendages 

 rather shorter than those for 4, 5 and 6 ; the last segment 

 is narrower than the preceding two. The Abdomen is narrower 

 than the last segment of the thorax, rather shorter than the 

 proboscis, cylindrical, a little narrower posteriorly ; the posterior 

 extremity notched. The first pair of appendages are very 

 long, extending well beyond the extremity of the proboscis, 

 there are two joints, the first long, cylindrical, rather broader 

 distally than proximally, with about a dozen simple hairs ; 

 the second joint scarcely a third of the length of the first, the 

 dactyli slender and acute, crossing at their apices. The third 

 appendage is six jointed, nearly as long as the body and abdomen, 

 slender. The first joint is thicker than the rest but very short ; 

 the second is twice as long as the first and rather narrower ; the 

 third is more than twice as long as the second and very slender ; 

 the fourth is very short, scarcely a fourth of the length of the 

 third, but about the same breadth, slightly curved ; the fifth is 

 also slightly curved and is somewhat smaller than the fourth ; 

 the sixth is extremely small, scarcely half the length of the fifth. 

 The fourth, fifth, sixth and seventh appendages are very similar 

 to one another. The first joint is short and stout ; the second is 

 longer, constricted at the base ; the third is very small, not half 

 the length of the second ; the fourth is nearly as long as the first 

 three together ; the fifth is rather shorter than the fourth and 

 narrower ; the sixth is about equal in length to the fifth, but 



