524 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



PLATE 54 



Nipporhynchus ornatus (Van Cleave), Gorgorhynchus clavatus, new species, 

 and Southwellina hispida (Van Cleave) 



Fig. 15. A^ ornatus, anterior extremity of female showing character- 

 istic form of proboscis and its hooks and arrangement of 

 cuticular spines on body surface arranged in two distinct 

 fields. 



Fig. 16. G. davatus, posterior extremities of male and female in 

 copula. 



Fig. 17. S. hispida, proboscis of mature male showing form of pro- 

 boscis and arrangement of hooks. The body spination begins 

 posterior to the region shown in this sketch. 



