8 G. STEWARDSON BRADY. 



claw very long, thread-like in its tenuity, nearly half as long as the entire limb ; 

 external copulative organ (fig. 18) elongated, divided into two portions, the distal part 

 pear-shaped and attached by a narrow neck to the basal region. 



Of this curious form only four specimens were found ; all of them males. Three 

 specimens from a surface netting in Lat. 49 40' S., Long. 172 18 '30' E., and one 

 from a netting in five fathoms, Lat. 58 49 '45' S., Long. 154 48' W. It is difficult 

 to account for the presence at the surface of an animal quite destitute of swimming 

 organs. I am disposed to think that the real habitat is probably among floating weeds, 

 and that the extremely long hinder limb may be useful in giving a grasp of delicate 

 algae or other vegetation. 



EXPLANATION OF PLATES. 



PLATE I. 

 PHILOMKDES OEBICULAEIS. 



Fig. 1. Shell of female seen from left side X 22. 



2. from above x 22. 



3. male seen from right side x 30. 



., f>. Beak and sinus of female seen from side X 84. 



7. Extremity of antennule of male X 84. 



,, 8. Antenna of female x 50. 



,, 9. Secondary branch of the same X 120. 



10. of male x 120. 



11. Mandibular foot of female X 100. 



(a) Process of basal joint X 300. 



., 12. Principal tooth of second maxilla seen from side X 240. 



13. seen from front X 240. 



14. End of vermiform foot x 84. 



., 15. Post abdominal lamina X 84. 



XESTOLEBERIS EENIFOUMIS. 



Fig. 4. Shell of male seen from left side X 84. 

 5. from above X 84. 



PHILOMEDES ASSIMILIS. 



Fi<;. 16. End of antennule of male X 84. 



17. External branch of the antenna of male x 50. 



18. Antenna of female x 84. 



19. Mandibular foot of female X 100. 



(rt) One of the marginal setse more highly magnified. 

 Figs. 20, 21. Principal tooth of second maxilla seen laterally and obliquely X 240. 



PLATE II. 

 PHILOMEDES ASSIMILIS. 



Fig. 1. Shell of female seen from left side x 40. 



2. seen from above X 40. 



3. male seen from left side x 40. 



4. Beak and sinus of male X 84. 



5. Post-abdominal lamina of male X 84. 



6. female X 84. 



