U.S. NAT. MUS. BULL. 284 



SPRINGER — PLATE 4 



PARAS 



METH 



METH 



BASOC SUPCLEI 



/ 

 VOM PARAS SPHEN PROO INTERC POSTT 



BASOC 



LAETH FROM 



PTEROT 



Omobranchus japonicus, USNM 174330, female, 44.6 mm standard length, cranium: top, 

 dorsal view; center, lateral view; bottom, ventral view. 



