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 

 algse or other vegetation. 



Explanation of Plates. 



PLATE I. 



Philomedes oebicularis. 



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

 „ 2. „ „ from above x 22. 



„ 8. „ male seen from right side X 30. 



., 6. 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. 



Xestolebeeis renifoemis. 



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

 „ 5. „ „ from above X 84. 



Philojiedes assimilis. 



Fig. IG. 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. 



(r<) 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. 



