SCIENTIFIC EESULTS OF EXPLOEATIONS BY THE U. S. 

 FISH COMMISSION STEAMER ALBATEOSS. 



[Published by permissiou of Hon. Marshall McDonald, Commissioner of Fisheries.] 



No. XXXIV.— REPORT ON MOLLUSCA AND BRACHIOPODA DREDGED IN 

 DEEP WATER, CHIEFLY NEAR THE HAWAIIAN ISLANDS, WITH ILLUS- 

 TRATIONS OF HITHERTO UNFIGURED SPECIES FROM NORTHWEST 

 AMERICA. 



By William Healey Dall, 



Honorary Curator of the Dejyartment of MolluslcB. 



In the latter part of 1891 tlie Albatross was engaged in making 

 soundings between the coast of California and the Hawaiian Islands, 

 with the intention of obtaining a profile of the sea bottom for use in con- 

 nection with plans for laying a submarine telegraph cable. This work 

 was performed as rapidly as possible, and no delays made for dredging 

 or other work not strictly germane to the purpose of the voyage until 

 on approaching Honolulu the archibenthal plateau about the islands 

 was reached, and here, in between 300 and 400 fathoms, eight hauls of the 

 dredge were made, of which a table follows. Half a dozen small bottles, 

 containing mollusks and brachiopods, were received in 1892, and the 

 following account of their contents leads us to regret that more time 

 could not have been devoted to dredging. 



The material obtained is not only very interesting, zoologically, but 

 wholly new, not a single species heretofore described, either from the 

 deep sea or from the Hawaiian Archipelago, being found among the 

 dredgings. A new subgenus of Pleurotomidse, the hitherto unknown and 

 very interesting soft parts of a species of Uuciroa, regarded as belonging 

 to the Verticordiidfe, but now necessarily raised to family rank, sev- 

 eral new Brachiopods, etc., are among the material secured, and 

 described in the following pages. To these are added a few new species 

 from the northwest American coast, and a number of species described 

 briefly without figures in 1891 are now suitably illustrated. 



Table of stations of U. S. Str. Albatross, near the Raivaiian Islands, December S to 6, 1S91. 



Proceedings of the U. S. National Museum, Vol. XVII. —No. 1032. 



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