PYCNOGONIDS 259 



D. Chelifori 2 -jointed .... Tatiysiyhim iniermcdii4>fi, p. 278 

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



{Clotenia) C. occidefiialis,Y>. 2S1 



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

 male only, 5- or 6-jointed {Phoxichilidiid.-e). 

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

 beyond base of proboscis ; lateral processes well separated ; 

 ovigera 5 -jointed {ThoxicJiilidium) . . . P. fcmoratum, p. 283 

 B'. First trunk segment projecting somewhat anteriorly beyond base 

 of proboscis ; body concentrated, lateral processes closely ap- 

 proximated {Halosotna) H. viridintestinalis, 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 {Aiwplodactylus). 

 C. Caudal segment directed upward . Anoplodactyhis erecttis, p. 289 

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

 [Fvcnogon'jd^e). 

 B. Ovigera 9- or lo-jointed {^Pycnogonuni). 



C. Ovigera lo-jointed Pycnogomwi stearnsi, '^. 292 



SYSTEMATIC DISCUSSION OF SPECIES. 

 PYCNOGONIDA. 



Family ACHELIDJE. 



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

 ovigera lo-jointed, present in both sexes. 



Genus Lecythorhynchus Bohm ('79b). 

 Corniger V>o\{.^^ '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 1 -jointed (mere knobs) or 2-jointed.i Palpi long, 9-jointed. 

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

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

 large. 



Remarks. — Bohm first named this genus Corfiigcr, 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 Bohm, both of which came from Japan. 



1 In LecytJioj-hyncJuis amtatus Bohm. 



2 " Da die Bezeichnung Cornigerm^zs?, bereits fiir eine Fischgattung vergeben ist, so 

 mag dieselbe durch Lecythorhynchus ersetzt werden."— Bohm ('79!^). 



