EXPLANATION OF PLATE LVIII. 

 Penceopsis monocerox (Fabricius). 



Fig. 1. Lateral view of an immature male cotype of 

 Harwell's "Pena'ux nia-xlo-sii" in the collection 

 of the Macleay Museum, Tniversity of Sydney. 

 Carapace and rostrum 20 mm. long (rostrum 

 slightly damaged at tip ) . 



Fig. l*. Thelycum of a young female in the collection of 

 the Australian Museum (Reg. No. P.4287 part), 

 measuring 17 mm. from the tip of the rostrum 

 to the end of the carapace. 



