PYCNOGONIDS 259 



D Chelifori 2-jointed .... Tanystylum intermedium p. 278 

 C" Chelifori i-jointed; palpi 4-jointed; body very much shortened 



(Clotenia) C. occidentalis,^. 2Z1 



A' Chelifori present, chelate; palpi absent; ovigera present in the 

 male only, 5- or 6-jointed {Fhoxichilwiidm). 

 B First trunk segment produced very little, or not at all, anteriorly 

 bevond base of proboscis; lateral processes well separated; 

 ov\gex2i S-]^init^ {Phoxichilidium) . . . R femoraium, ^. 22>2> 

 W First trunk segment projecting somewhat anteriorly beyond base 

 of proboscis ; body concentrated, lateral processes closely ap- 

 proximated {Halosoma) H- viridintestinahs, p. 286 



B". First trunk segment projecting well beyond base of proboscis, 



forming a slender neck; body elongate, lateral processes well 



separated ; ovigera 6-jointed {Anoplodadylus), 



C Caudal segment directed upward . Anoplodactylus erectus p. 289 



A". Chelifori and palpi both absent; ovigera present m the male only 



[PVCNOGONID.^). 



B Ovieera q- or lo-jointed {PycnogoJitim). 



C. Ovigera I o-jointed Pycnogonum stearns^,^^. 2^2 



SYSTEMATIC DISCUSSION OF SPECIES. 

 PYCNOGONIDA. 

 Family ACHELIDJS. 

 Chelifori present, chelate in larva but not in adult; palpi present; 

 ovigera i o-jointed, present in both sexes. 



Genus Lecythorhynchus Bohm ('79b). 

 Corniger'&OYiU, '79*, P- 186. 



Trunk rather stout, sutures well defined; lateral processes rather short, 

 well separated. Caudal segment moderately long, pointed upward. 

 Eye tubercle slightly anterior to middle of first segment, pointed. 

 Proboscis comparatively long, approximately cylindrical. Chelifori 

 either i-jointed (mere knobs) or 2-jointed.i Palpi long, g-jomted. 

 Ovigera lo-jointed. Legs moderately long and stout; first tarsal jomt 

 very small ; second tarsal joint stout, curved ; claw strong ; auxiliary claws 



lot" org 



Bemarks.-Wohm first named this genus Corniger, but later, finding 

 that name untenable,^ changed it to the present one. Besides the species 

 here described, the genus at present includes only the two species recorded 

 by B5hm, both of which came from Japan. 



1 In Lecythorhynchus armatus Bohm. 



2 " Da die Bezeichnung Connger\n^^s,s bereits fur eine Fischgattung vergeben 1st. so 

 mag dieselbe durch Lecythorhynchus ersetzt werden."-B6hm ('79^)- 



