16 



PROCEEDINGS OF THE ISTATIOIlTAL MUSEUM 



VOL. 72 



The endopodites of the third, fourth, and fifth pleopoda are roundly 

 triangular, with the inner portion thickened, smaller than the exo- 

 podites, the fifth endopodite being the largest. 



Fig. 6. — Dbtonblla papillicornis (Richardson). Female, a. Seventh leg; h. First 

 EXOPODITB ; c. Second exopodite ; d. Third exopodite ; e. Fourth bxopodite ; f. Fifth 

 HXOPODITB ; g. Second endopodite ; h. Thied ok fourth endopodite ; i. Fifth bndo- 

 PODITB ; J. Left mandible ; fc. Right mandible 



The pleopoda of the female differ considerably from those of the 

 male. The first exopodite is almost transversely rectangular, the 

 following exopodites gradually changing from a rectangular to a 



