24 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Distribution. — I have had a number of specimens in the Albatross 

 collection which seem to be referable to this species. They are mostly 

 from the northeastern coast of the United States, with two stations 

 off southern Florida. In the Summary of Results of the Challenger 

 Expedition specimens are recorded from several Challenger stations 

 in the Atlantic; one of these is off the eastern coast of the United 

 States in the same general region from which the Albatross material 

 came. Another is off the West Indies. Two others are in the South 

 Pacific, westward from the mouth of the Rio la Plata. There are 

 numerous records for it off the British Isles. Goes records it from 

 Spitzbergen and also from the Caribbean. There are records for it 

 from the Mediterranean, the Antarctic, the Kerimba Archipelago, 

 off New Zealand, and elsewhere. There seems to be a question as to 

 wdiether this is really a very widely distributed species or whether, 

 being of a smooth type with very few distinguishing characters, there 

 may be several forms included under this name. In the Gulf of 

 Mexico there is a varietal form which has very numerous very fine 

 costae, which are so fine and close together that it is difficult to make 

 them out except with a considerable magnification. In their general 

 shape they are similar to the smooth forms from the Atlantic coast 

 of the United States. 



Lagena gracillima — material examined. 



' Variety. 

 LAGENA HEXAGONA (Williamson). 



Plate 4, fig. 6. 

 Entosolenia squamosa Montagt^ var. hexagona Williamson, Ann. Mag. 

 Nat. Hist., ser. 2, vol. 1, 1S48, p. 20, pi. 2, fig. 23 ; Rec. Foram. Great 

 Britain, 1858, p. 18, pi. 1, fig. 31. 



