NO. 1480. SCHIZOPOD CRUSTACEANS— ORTMANN. 47 



(50 to To mm.). I5ut I am not quite sure of it, and so I prefer, for 

 the present, to regard G. sdvsi as a variety of G. soea {= irUleinoesl). 

 It should be mentioned that Faxon" thinks that G. sarsi is "a form 

 probabl}' not specifically distinct from G. willemoesi.^'' 



The young specimens extracted from the pouch of the old female 

 show a distinct angle or point behind on each side of the carapace, 

 but as the carapace is rather shapeless, being represented by a kind of a 

 bag filled partly with oily or fatty substance (yolk), it is impossible to 

 correlate these two small points with the infero-posterior corners of 

 the carapace, although this correlation is very probable. 



3. I have shown that the denticulation of the posterior margin of 

 the carapace and of the dorsal spine does not constitute a specific 

 character. 



4. The subdorsal keels of the abdomen, mentioned b}^ Wood-Mason, 

 are present in all specimens at hand. They are formed I)}" rather faint, 

 blunt elevations, and I should not call them keels. They are easily 

 overlooked, especially in poorl}" preserved material. 



5. A third, fine median keel of the telson is distinctly seen in Sars's 

 illustration of the telson of G. willeinoesl (Phite V, fig. 6), and is present 

 in all specimens examined by myself. On closer examination 1 find 

 that this median keel is rather a fine double keel. 



AVood-Mason's sentence that the telson "appears to be more pro- 

 duced at the tip than in any other species" is, as I have already 

 remarked in the report on the Hawaiian Schizopods, unintelligible to 

 me. I do not see an}' diflerence from other species in the shape of the 

 telson. 



localities represented in the U. S. National Museum. 



YB.OM U. S. BUREAU OF FISHERIES STEAMER AlhatrOSS STATIONS. 

 GNATHOPHATJSIA ZOEA. 



2723 — 1 female (gravid). Between Nantucket and Cape Charles, 1,685 



fathoms. 

 4306—1 male. Ofi' San Diego, California, 207-497 fathoms. 



GNATHOPHAUSIA ZOEA SARSI, 



2351 — 1 young. Between Havana and Yucatan; 426 fathoms. 



Previous records. 



Tyj>icaJ foriji, as G. zoi'-a: West of Azores, 1,000 fathoms (Sars); 

 Tropical Atlantic, 1- 47' North, 24^ 23' West, 1,850 fathoms (Sars); 

 ofi lirazil, 770 fathoms (Sars); Pacific, north of Kermadec Island, 60(> 

 fathoms (Sars); ofi' Galapagos Islands, 384 and 5S1 fathoms (Faxon); 



"Mem. Mus. Comp. Zcol., Xyill, 1895, p. 215. 



