50 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVII. 



EPICARIDEA or BOPYROIDEA. 



Family BOPYRID.E. 



DIPLOPHRYXUS, ne^isr genus. 



Bod}" of female veiy asymmetrical, one side being much more swollen 

 than the other side. All seven leg's present on the smaller side. The 



lirst leg, only, present on the 

 swollen side. Segments of 

 thorax defined only on smaller 

 side. 



Abdomen composed of only 

 live segments, the tirst four 

 carrying each two pairs of 

 double-branched appendages, a 

 pair on either side. The incu- 

 batory lamellae consist of four 

 pairs of plates, those of the 

 smaller side being greatly re- 

 duced and crowded together, 

 the lamellae of the swollen side 

 sufficing to cover the marsupial pouch and extending as large plates 

 over the whole ventral area. 



This genus differs chiefly from P// /v/./v/.s' Rathke, in having the two 

 pairs of pleopoda, one pair on either side of the body for each seg- 

 ment, double- branched instead of single-branched. 



Fig. 26.— Female of Diplophryxus jordani, new 

 SPECIES, a, dorsal view; h, ventral view. X 8. 



DIPLOPHRYXUS JORDANI, new species. 



Body of female very asymmetrical, one side being ver}- much more 

 swollen than the other. Outline verj^ irregular. 



Head deeply sunk in thorax, and surrounded by first 

 segment of the thorax; frontal margin covered h\ the 

 projecting lobe of the first lamella of the incubatory 

 pouch which folds over on the dorsal side. Antenna* 

 small. Oral area wholly concealed on the ventral side. 



Segments of thorax defined on one side only, the 

 smaller side. The first five are small and closelv 

 crowded together, the sixth somewhat longer, the 

 seventh the longest. All seven legs are present on 

 the smaller side, all, except the first one, ])eing small and feeble. Only 

 one leg is present on the other, the swollen side, this one belonging to 

 the first thoracic segment. 



Abdomen narrow, elongate, and composed of five well-defined seg- 



FiG. 27.— Head and 

 FIRST pair of 



ANTENN.B OF BlP- 

 LOPHRYXUS JOR- 

 DANI. X 14. 



