SCIENTIFIC RESULTS OF EXPLORATIONS BY THE U. S. FISH COM- 

 MISSION STEAMER ALBATROSS. 



[Published by perraiasinn of Hon. Marshall McDoxalu, Conimissioner of Fisherie9» 



No. XXVI.— REPORT ON THE PTEROPODS AND HETEROPODS COLLECTED 

 BY THE U. S. FISH COMMISSION STEAMER ALBATROSS DURING THE 

 VOYAGE FROM NORFOLK, VA., TO SAN FRANCISCO, CAL., 1887-'88. 



BY 



James I. Peck. 



(With Plates liii-lv.) 



I.— THE THECOSOMATOUS PTEROPODS. 



In the course of the steamer Albatross, south from Norfolk, represent- 

 atives of this group of the Molkisca were dredged at a series of seven 

 stations, oft" the West Indies Islands and along the eastern coast of 

 South America, as follows : 



2750 

 2751 

 2754 

 2756 

 2760 

 2761 

 2763 



18 30 N. 

 16 54 N. 



11 40 N. 

 3 22 S. 



12 7S. 

 15 39 S. 

 24 17 S. 



Long. 



63 31 00 W. 

 63 12 00 W. 

 58 33 00 W. 

 37 49 00 W. 



37 17 00 W. 



38 32 54 W. 

 42 48 .30 W. 



Character of bottom. 



Date. 



1887. 



fine gray sand Nov. 27 



blue glob, ooze Nov. 28 



glob, ooze Dee. 5 



gray .sand bank Deo. 14 



brown clay (ooze) Dec. 18 



pteropod ooze Dec. 26 



brown glob, ooze | Dec. 30 



They Avere also taken in a series of surface collections extending 

 over regions as follows : 



34 13 N. 

 31 16 N. 



4 21 S. 



7 37 N. 



30 N. 



08 S. 



smooth 



smooth 



very smooth, 

 liglit swell-, 

 light awelL. 

 smooth 



Sky. 



clear 



slightly cloudy 



moonlig]it 



hazy 



light clouds.. . 

 light doud.s.. . 



Date. 



Nov. 22, 5 p. m. 

 Nov. 23,6:15 p.m. 

 Mar. 1,1888, 4:45 a.m. 

 Mar. 3,2:15p.m, 

 Apr. 3, 7:35 p.m. 

 Apr. 15, 7:30 p. in. 



Of these, it will be seen that they do not in any way coincide with 

 the dredging stations,since only tlie first two in which live pteropods 

 were taken are located in the Atlantic, off" Cape Hatteras, and farther 

 east oft' northern Florida, while the four others are located in the Ta- 

 cific, one off' Cape Blanco of Peru, one in Bay of Panama, and two 

 east from the Galapagos Islands. The vessel having in the mean time 

 passed around South America: into the Pacific, and sailing northward 



Proceedingis National ^Museum, Vol. XVI— No. 943. 



451 



