PYCNOGONIDS 259 
D. Chelifori 2-jointed. . . . Zanystylum intermedium, p. 278 
C’’. Chelifori 1-jointed; palpi 4-jointed; body very much shortened 
(Clotenia). . . « C. occidentalis, p. 281 
. Chelifori present, chelate; palpi absent ; ovigera present in the 
male only, 5- or 6-jointed (PuoNXICHILIDIID), 
B. First trunk segment produced very little, or not at all, anteriorly 
beyond base of proboscis; lateral processes well separated ; 
ovigera 5-jointed (Phoxichilidium) . . . P. femoratum, p. 283 
B’. First trunk segment projecting somewhat anteriorly beyond base 
of proboscis; body concentrated, lateral processes closely ap- 
proximated (Halosoma). . . .f. 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 (Anoplodactylus). 
C. Caudal segment directed upward . Anoplodactylus erectus, p. 289 
A”. Chelifori and palpi both absent; ovigera present in the male only 
(PYCNOGONID#). 
B. Ovigera g- or 10-jointed (Pycnogonum). 
C. Ovigera ro-jointed. . . . . . Lycnogonum stearnsi, p. 292 
SYSTEMATIC DISCUSSION OF SPECIES. 
PYCNOGONIDA. 
Family ACHELIDAZ 
Chelifori present, chelate in larva but not inadult; palpi present; 
ovigera 10-jointed, present in both sexes. 
Genus Lecythorhynchus Bohm (’79p). 
Corniger BOHM, ’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.1 Palpi long, 9-jointed. 
Ovigera 10-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 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 Bohm, both of which came from Japan. 
1In Lecythorhynchus armatus Bohm, 
2 ‘« Ta die Bezeichnung Corniger indess bereits fiir eine Fischgattung vergeben ist, so 
mag dieselbe durch Lecythorhynchus ersetzt werden.” —Bohm (’79>). 
