54 On Crustacea found in a Deep-sea CephaJopod. 



Length of the specimens scarcely 2 mm. 



Pontostratioles (the sea-soldier) appears to be a true bottom 

 form ; it was discovered by Dr. Brady amongst some mud 

 brought up from a depth of over 2000 fathoms. Dr. Brady, 

 in his remarks on this Harpactid, says : — " This wonderful 

 species was found — but unfortunately one specimen only, and 

 that in a dried state — amongst material taken in the row-net 

 at a depth of 2200 fathoms in lat. 37° 29' S., long. 27° 31' W. 

 This single specimen was apparently much shrunk and dis- 

 torted, owing to its having been dried amongst the mud in 

 which it was taken, and on this account many of the details of 

 structure have been very imperfectly made out. The tail-seta?, 

 for instance, and the minor details of the mouth-organs were 

 partly indistinguishable, the limbs much matted together, 

 and the natural contours doubtless in other parts much 

 altered." Notwithstanding that Dr. Brady had only one 

 specimen, and that not in the best condition, his description 

 is remarkably full and in accord with the specimens from 

 the gizzard of the Stauroteuthis, and it is only because these 

 specimens enable me, with my son's assistance, to supply 

 some missing parts that I have ventured to supplement 

 Dr. Brady's excellent description. 



This curious species does not appear to have been met with 

 since Dr. Brady's discovery of it in the ' Challenger ' collec- 

 tions till now, and it is owing to Dr. Hoyle's interest in other 

 departments of natural history besides his own that we are 

 indebted for the opportunity of examining these specimens 

 from a widely different locality from that where the species 

 was first discovered. 



EXPLANATION OF THE PLATES. 



Plate II. 



Pontostratiotes abyssicola, Brady, $ . 



Fig. 1. Antennule, x 50. 2. Second maxilliped, X 102. 3. Foot of 

 first pair of thoracic legs, x 76. 4. Foot of second pair, X 72. 

 5. Second thoracic segment, x 50. 6. Third thoracic segment, 

 X 50. 7. Fourth thoracic segment, x 50. 8. Caudal rami, 

 X 72. 



Plate III. 



Pontostratiotes abyssicola, Brady, 2 • 



Fig. 1. Antenna, X 38. 2. Mandible and palp, X 103. 3. Maxilla, 

 X 103. 4. Second maxilliped, x 103. 5. Foot of third pair 

 of thoracic legs, x 72. 6. Fuot of fourth pair, X 72. 7. Foot 

 of fifth pair, x 103. 



