FORAMINIFERA OF NORTH PACIFIC OCEAN. 



73 



Description. — Test elongate, cylindrical, the early portion consisting 

 of chambers arranged triserially, rounded in cross section; cham- 

 bers almost indistinct from the exterior, the sutures not depressed; 

 later portion consisting of chambers arranged uniserially, distinct, 

 but the sutures only slightly excavated, circular in cross section; 

 wall composed of sand, usually fine in texture, with the surface 

 smoothly finished ; aperture in the middle 

 of the terminal wall of the chamber in 

 the uniserial portion, usually with a 

 short but very distinct neck; aperture 

 with a single tooth; color gray. 



Length up to 5 mm. 



Distribution. — In the North Pacific 

 this species was recorded by Brady 

 from two Challenger stations, in 345 

 fathoms off Japan, and in 2,300 fathoms 

 in the region east of Japan; Goes records 

 it from several Albatross stations off 

 the west coast of America in depths 

 from 772-1,471 fathoms; Flint records 

 it from 51 fathoms in Panama Bay. I 

 have found it frequently in the North 

 Pacific material which I have examined, 

 most frequently in globigerina ooze and 

 muds from a medium depth. It has 

 occurred near the Galapagos Islands, 

 and at scattered stations in the Nero 

 material from the line of soundings 

 across the Pacific, and in the material 

 from the Albatross (1906) cruise it is 

 common from about Japan. It occurs 

 also in the collections from south of the 

 Aleutian Islands, Tuscarora station 126, 

 in 500 fathoms. 



This, as far as the North Pacific is 

 concerned, is by far the most common 

 species. As shown by Brady's figures in the Challenger report, there 

 are two rather different forms, but the material is not sufficient to 

 establish definite varieties at this time. 



117 



Figs. 115-117.— Clavulina communis. 

 x 30. 115, young specimen with 

 but two of the second series of 

 chambers developed. 110,0, front 

 view of medium-sized specimen; 

 b, end view of the same. 117, 

 adult specimen in front view. 



CLAVULINA BRADYI, new name. 



Clavulina cylindrica H. B. Brady (not C. cylindrica d'Orbigny, 1826), Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 396, pi. 48, figs. 32-38.— Bagg, Proc. 

 U. S. Nat. Mus., vol. 34, 1908, p. 134. 



Description. — Test stout, cylindrical, the early triserial portion 

 not well shown exteriorly, the later uniserial portion of few 



