46 THE VOYAGE OF H.M.S. CHALLENGER. 



Station 73, June, 30, 1873; lat. 38' 30' N., long. 31° 14' VV. (North Atlantic, west 

 of the Azores) ; depth, 1000 fiithoms ; Pteropod ooze; bottom temperature, 39°'4. 



Station lOG, August 25, 1873 ; lat. 1° 47' N., long. 24° 26' W. (Tropical Atlantic) ; 

 depth, 1850 fathoms; Globigerina ooze ; bottom temperature, 36°-6. 



Station 126, September 12, 1873; lat. 10° 40' 8., long. 36° 8' W. (off Rio Sau 

 Francisco, Brazil) ; depth, 770 fatlioms ; red mud. 



Station 171, July 15, 1874; lat. 28° 33' S., long. 177° 50' W. (Pacific, north of the 

 KeiTuadec Islands) ; depth, 600 fathoms ; hard ground ; bottom temperature, 39°'5. 



Distribution. — As may be inferred from the above specified localities, the geographical 

 distribution of the present species is very extensive, ranging from the North Atlantic to 

 the Pacific Ocean. The species also inhabits, as stated above, the seas of Europe, having 

 been found by the French expedition in the Bay of Biscay. 



10. Gnathophausia longixpina, G. 0. Sars (PL VII. figs. 1-5 ; PI. VIIL). 



Gnathopliausia longispina, G. O. Sars, Preliminary Notices on the Challenger Schizopoda, 

 No. 10. 



Specific Characters. — Form of body closely approximating to that of Gnathop>hausia 

 zoea. Dorsal spine very large, finely serrate, both at the dorsal and lateral edges. 

 Eostrum exceedingly elongate and slender, almost twice the length of the carapace, and 

 coarsely denticulate. Supra-orbital spines strongly developed ; antennal spines obsolete ; 

 branchiostegal spines well marked, triangular, and projecting straight outward. Five 

 anterior caudal segments slightly keeled above, and produced at the middle of the 

 posterior margin into smaU dorsal denticles ; posterior lappet of epimera acuminate, that 

 on the second segment remarkably produced. Anterior section of last segment with 

 two epimeral spines on either side. Eyes short, claviform. Antennal scale remarkably 

 large, with terminal lobe very narrow, the spine of the outer corner exceedingly strong, 

 mucroniform, and greatly surpassing the terminal lobe, coarsely denticulate on both 

 edges, the denticles being continued along the outer margin of the scale almost to its 

 base. Telson and uropoda almost the same as in Gnathophausia zoea. Length reaching 

 59 mm. 



Remarks. — This species, at the first glance, much resembles Gnathophausia zoea 

 in appearance, but may readily be distinguished from it by the still more elongate 

 rostrum, the closely denticulate dorsal spine, the absolute want of antennal spines, 

 the branchiostegal projections being very distinctly marked ; and, finally, by the strong 

 development of the antennal scale, and more particularly of the spine issuing from its 

 outer corner. 



Description. — Of this species also, no less than five specimens were collected, all 

 in the same locality. One is a female, the remainder being males. The largest 



