72 A RE-EXAMINATION OF AUSTRALIAN PYCNOGONIDA, 



mm. 



Leg, secoBd coxa 48 



third ,, 33 



femur 5.76 



first tibia 5.47 



second ,, 4.94 



BemarJcs. — The holotype was taken in Port Denison, 

 Queensland (depth not given). 



There is no doubt in my mind that li. davipes (Car- 

 penter) must be regarded as a synonym of R. tenuissimus 

 (Hasw). The lengths and proportions of the joints of the 

 trunk, palps, and legs agree perfectly in tne two species. 

 The proportion of the length of the proboscis to the trunk 

 is 1:1.2 in R. tenuissimus. In R. davipes it is 1:1.1. 

 The somewhat different shape of the proboscis in R. tenuis- 

 simus is no doubt due to the distortion caused by the 

 specimen being mounted as a microscope slide. 



It is possible that the cheliform arrangement of the 

 terminal portion of the oviger may be confined to the male. 

 Further, both species come from the Australian region 

 of the Tropicsi. 



Nymphon ^quidigitatum, Haswell. 



(PI. XVIII., figs. 4-5; pi. XIX., fig. 6.) 



1884, Nymphon (equidigitatum, Haswell, 1884, p. 1022, 

 plate 56, figs. 1-5. 



1889, Nymphon cequidigitatum, Whitelegge, 1889, p. 233. 



1908, Nymphon cequidigitatum, Loman, 1908, p. 38. 



Specimens : — Australian Museum Collection, No. 

 G5196, holotype, $, Pt. Jackson; Australian Museum 

 Collection, No. G5198, paratype, ^ ; Australian Museum 

 Collection, No. G5197, paratype, 9 , Broughton Island. 



In addition, several spirit specimens from Port Jack- 

 son and from Shark Island, Port Jackson, contained in the 

 Australian Museum collection and that of the Zoological 

 laboratory of the University of Sydney. 



In view of the fact that this genus is an extraordin- 

 arily large one, comprising very many species disting-uished 

 from one another by relatively insignificant characters, I 

 have thought it desirable to re-describe Haswell's species 

 in some detail. 



Description: — Body. — Fairly broad and stout, suture 

 lines distinct, crurigers well separated, each a little longer 

 than broad — cephalic segment large, its length being 



