No. 13. — Reports on the Scientific Results of the Expedition to 

 the Eastern Tropical Pacific, in charge of Alexander Agassiz, 

 hy the U. S, Fish Commission Steamer " Albatj'oss,'^ from 

 October, 1904, to March, 1905, Lieut. Commander L. K 

 Garret, U. S. N., Commanding. 



IV. 



OcTACNEMUs. By "William E. Eitter. 



Five specimens of this remarkable animal were taken by the 

 "Albatross" during her cruise under the direction of Mr. Agassiz iu 

 the winter of 1904-1 905 ; two at station JN'o. 4649, and three at station 

 No. 4656, The first mentioned was in latitude 5° 17' south, and longi- 

 tude 85° 19.5' west, at a depth of 2,235 fathoms ; the second in latitude 

 6° 54.6' south, and longitude 83° 34.3' west, in 2,222 fathoms. These 

 positions are between three hundred and four hundred miles off the 

 coast of Ecuador. 



The " Challenger " specimens of Odacnemus were also taken at two 

 stations; one, No. 218, in latitude 2° 33' south, and longitude 144° 4' 

 east; and the other. No. 299, in latitude 33° 31' south, and longitude 

 74° 43' west. The first of these was in 1,070 fathoms, the second in 

 2,160 fl\thoms. 



It will be seen from this that the "Albatross" specimens are from 

 practically the same zoological region and the same depth as those of 

 the " Challenger " station No. 299, this being approximately the same 

 distance from the coast of Peru that the " Albatross " stations are from 

 the Ecuador coast. It may be noted further that both localities are 

 in the course of the Humboldt current. The first " Challenger " specimen, 

 the one on which ^Moseley founded the genus, was, on the other hand, 

 taken from just north of New Guinea, consequently the whole width of 

 the Pacific Ocean from the locality of the others. 



Although expressing the view that the South Amen'can specimen was 

 probably the same species as the one studied by Moseley, Herdman, who 



