120 Proceedings of the Biological Society of Washington. 



of the gonopods pertaining to the group embracing victorianus and zaki- 

 ■wanus Chamb., but obviously different in details of form from those 

 species. Anterior plate of first gonopods straight, broadly oblong, distally 

 rounded. Posterior division of anterior gonopods more strongly chitinous 

 and blade-like, glabrous; narrowed strongly above base; at distal third 

 abruptly geniculate. Posterior gonopods very broad curved blades which 

 overlap at their apices, the latter rounded and entire, not bifid as in vic- 

 torianus. Number of segments in type, fifty-four. Length, near 40 mm. 

 Type in Museum of Comparative Zoology, Cambridge. 



