106 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



the North Pacific for this species, ranging from 1,850-3,950 fathoms. 

 Goes records it at several Albatross stations off the west coast of 

 Mexico and Central America in 772-1,879 fathoms. Bagg gives 

 four stations near the Hawaiian Islands, 367-1,342 fathoms. From 

 the Albatross and Nero material I have examined this species is noted 

 from many stations; Albatross D3603, from Holothurian stomachs 

 specimens taken in 1,771 fathoms in Bering Sea; from H3012 in 

 2,067 fathoms, between California and Hawaii; D4832, D4957, 

 D4958 in 76, 437, and 405 fathoms, respectively. It occurred at 

 a number of Nero stations in the dredgings from the Hawaiian 

 Islands west across the Pacific, the depths varying from 1,040 to 2,226 

 fathoms. 



The work of Brady in referring to Nonionina latidorsata Borne- 

 mann the recent species so common in the Arctic has been followed 

 by most later writers. After a careful study of Bornemann's original 

 figure and description I am unable to find clear enough reasons for 

 giving Bornemann's name to our species. The figure and description 

 call for a test which has high compressed chambers with the apertural 



face quadrangular, while in recent 

 specimens the apertural face of the 

 last chamber is typically very much 

 wider than high. The form of the 

 164 test is usually more globose than in 

 figs. i62-ig4.-haplophragmoides subglo- Bornemann's figure and the test pre- 

 bosum. x 16. from photograph. 163. sents a very different appearance. 



APERTURAL VIEW. » •, • in-j.1 1 1 ,1 



As it is definitely known what the 

 types of subglobosum are and as they are typical of the recent material 

 it has seemed to me better to use Sars's name rather than to refer 

 all our recent material to a rather indefinite fossil species. 



The form with its aperture consisting of a number of pores which 

 is included by Brady under Ha/plophragmium latidorsatum seems to 

 be very distinct, and as far as the North Pacific material is concerned 

 has a definite distribution. It will be considered there as generically 

 distinct from the planospiral forms with simple apertures. 



I have not attempted to give the complete synonymy as many 

 later authors have referred specimens to Haplophragmium latidor- 

 satum without figures or description, and without seeing the original 

 material a clearing up of the synonymy is impossible. 



In the North Pacific this species seems to be common in cold or 

 deep waters and is well distributed, being perhaps the most common 

 of the chambered arenaceous forms. 



