PYCNOGONIDS 283 



ment simple, pointing upward. Chelifori well developed ; chelae strong 

 and curved. Ovigera 5-jointed, sigmoid ; third joint with a constric- 

 tion at about one third or less of its length ; last joint nearly as large 

 as fourth, armed with a few (one or more) rows of unguiform spines. 

 Legs slender; ^s.i small; ^s.2 well developed and armed at base with 

 distally curved spines ; c/. strong ; aux. cL distinct. Genital openings on 

 second coxal joints of all the legs. 



Remarks.— T\ivs> genus has been made to include rather diverse forms, 

 many of which, as stated by Sars, probably belong even to other families. 

 Wilson ('78^) removed from these into the genus Anoplodactylus those 

 forms in which the first trunk segment projects considerably beyond the 

 base of the proboscis, and which have 6-jointed ovigera. I accept the 

 genus /%<7Jc/(;/«7/^«^w as restricted by Sars ('91), "principally character- 

 ized by the cephalic segment not projecting anteriorly beyond the base 

 of the proboscis, the comparatively well-developed chelifori, and the 

 structure of the false legs in the male," i.e., 5-jointed, with the last joint 

 comparatively large. Sars concludes that but three species of the genus 

 can be recognized with certainty, viz., Ph. femoratum (Rathke), Ph. 

 robustum Dohrn, and Ph. minor Wilson. He considers the form de- 

 scribed by Stimpson ('54) from the eastern coast of North America to be 

 identical with Ph. fejnoratiim of Europe; but Wilson ('78''), in his 

 description of Ph. minor, says (p. 14): "This species is closely similar 

 to P. maxillare, of which it may be a dwarf variety " ; and in a later 

 paper ('80, p. 481) he adds that since the publication of the first paper 

 " a much larger series of specimens has been obtained, which shows con- 

 clusively that the two forms cannot be separated, though extreme forms 

 appear very unlike." Thus if Ph. maxillare is a synonym of Ph. femo- 

 ratum it leaves but two species, Ph, femoratum and Ph. robustum, to be 

 referred to this genus. 



PHOXICHILIDIUM FEMORATUM (Rathke). 



Plate XIII, fig. 10; plate xxiv, figs. 1-5. 



Nymphon fe7norat7im Rathke, 1799, p. 201. 



Orithyia coccinea Johnston, '37, p. 378, pi- xii, figs. 4-6. 



Phoxichilidium coccineum Milne Edwards, '40, p. 536. 



Phoxichilidiinn coccineum GOODSIR, '44> P- 2, pi. I, figs. 6-8. 



? Phoxichilidium globostim GoODSiR, '42, p. 136, pi. Ill, fig. i. 



Phoxichilidium femoratum Kroyer, '45, p. 122. 



Phoxichilidium femoratum Kroyer, '49, pi. xxxviii, fig. 2, a-g. 



? Phoxichiliditim femoratum Hoek, -77, p. 6, Tab. XV, figs. 8-10. 



"i Phoxichilidium femoratum HOEK, '8I^ p. 512, pi. xxvi, figs. 18-21; pi. 



xxvii, fig. 19. 

 Phoxichilidium femoratu7n Hansen, '84, p. 650. 



