8 
G. STEWAEDSON BEADY. 
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' AY. 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 1. 
Philomedes orbicularis. 
Fig. 1. 
6 . 
7. 
8 . 
9. 
10 . 
11 . 
12 . 
13. 
14. 
15. 
Shell of female seen from left side x 22. 
„ „ from above x 22. 
„ male seen from right side x 30. 
Beak and sinus of female seen from side x 84. 
Extremity of antennule of male x 84. 
Antenna of female x 50. 
Secondary branch of the same x 120. 
„ of male x 120. 
Mandibular foot of female x 100. 
(a) Process of basal joint x 300. 
Principal tooth of second maxilla seen from side x 240. 
„ „ „ seen from front x 240. 
End of vermiform foot x 84. 
Post abdominal lamina x 84. 
Xestoleberis reniformis. 
Fig. 4. Shell of male seen from left side x 84. 
,, 5. ,, „ from above x 84. 
Philomedes assimilis. 
Fig. 10. 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. 
(a) One of the marginal sette more highly magnified. 
Figs. 20, 21. Principal tooth of second maxilla seen laterally and obliquely x 240. 
Fig. 
PLATE II. 
Philomedes assimilis. 
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. 
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