i8 



1906. GnathopJiansia zo'ea Ortmann, Proc. U. St. Nat. Mus. Vol. XXXI, p. 42, PL II, fig. 2a, 2b. 

 1906. GnatJiopJiausia zo'ca sarsi Ortmann, 1. c. p. 42. 



Stat. 35. March 28. Lat. 8°o'.3 S., long. ii6°59'E. 1310 m. Deep-sea trawl, i specimen. 

 Stat. 185. September 12. Lat. 3°2o'S., long. I27°22'.9 E. Hensen vertical net, from 1536m. 



to surface, i specimen. 

 Stat. 284. January 18. Lat. 8°43'.iS., long., 127° 16'./ E. 828 m. Deep-sea trawl, i specimen. 



The three specimens are of very moderate size, none among them being full-grown. 

 They show nothing worth mentioning. 



The synonymy list shows that I follow Ortmann in withdrawing G. IVillaiiocsii G. O. S., 

 and that I go a small step further in considering G. Sarsii W.-M. merely as a synonym, not 

 as a variety. In the British Museum (Natural History) I examined the two specimens described 

 by G. O. Sars, but, as mentioned by this author, the rostrum is mutilated in both specimens, 

 and the large specimen measures only 108 mm. from the end of telson to the bottom of the 

 incision between rostrum and one of the supra-orbital spines, while the other specimen has been 

 at most 104 mm. to the tip of the rostrum before its mutilation. This smaller specimen disagrees 

 with Sars' description of the species in some particulars: the outer spine of the antennal squama 

 projects a little beyond the end of the lamellar lobe, and a portion of the outer margin of 

 the squama is extremely finely serrated ; furthermore the postero-dorsal process is finely serrated 

 along its lower margin, and four larger teeth are found on the basal portion of this process 

 and downwards along the posterior margin of the carapace. In all these particulars this smaller 

 specimen agrees with G. Zo'ea and differs from G. Willemodsii as described by Sars, and G. 

 Willcniocsii ought to be united with G. Zo'ea. — Professor A. Alcock kindly lent me the 

 type of G. Sarsii Wood-Mason for examination, and I arrived at the result that it is identical 



w 



ith G. Zo'ea. 



5. Gnathophatcsia elegans G. O. Sars. 



1883. GnatJiopJiausia eJegans G. O. Sars, Forh. Vid. Selsk. Christiania for 1883, N° 7, p. 7. 

 1885. GnatJiopJiausia elegans G. O. Sars, Rep. Challenger Rep. p. 42, PI. VI, figs, i — 5. 

 1906. GnatJiopJiausia elegans Ortmann, Proc. U. St. Nat. Mus. Vol. XXXI, p. 51. 



Stat. 141. August 5. Lat. i°o'.4 S., long. 127° 25'. 3 E. 1950 m. Hensen vertical net, from 



1500 m. depth to surface, i specimen. 

 Stat. 143. August 7. Lat. i°4'.5 S., long. I27°52'.6 E. 1454 m. Hensen vertical net, from 



1000 m. depth to surface. 2 specimens. 

 Stat. 314. February 17. Lat. 7°36'S., long. 117° 30'. 8 E. 694 m. Trawl. 3 specimens. 



In my specimens and in the type-specimens of Sars the anterior tooth on the lower 

 lateral margin of sixth abdominal segment is considerably in advance of the lower end of the 

 line dividing the segment transversely; in his fig. i Sars has placed this tooth close at the end 

 of the dividing line. In all my specimens each of the five anterior abdominal segments has a 

 triangular, acute projection at the posterior dorsal margin -, on the two first segments these 

 projections are very conspicuous, as large as in G. Zo'ea, but on the following segments they are 

 a good deal smaller and besides gradually smaller behind. In all specimens the branchiostegal 

 lobe is somewhat protruding, subangular, with the tip rounded ; the outer margin of the antennal 



