44 



BUULETIN 100, UNITED STATES NATIONAL MUSEUM. 



BATHYSIPHON FLAVIIJUS de Folin. 



Bathysiphon flavidum de Foiin, Actes Soc. I.inn. Bordeaux, vol. 40, 1886, p. 279, 

 pi. 6, figs. 5a~c. 



Desa^ptio7i. — Test elongate, subcylmdricaL nearly straight, marked 

 by annular lines and areas of growth, wall smooth, liard but not pol- 

 ished, light yellowish-brown except at the apertural end. whicli wlien 

 complete is somewhat rounded and lighter colored. 



Diameter 1-2 mm. ; length up to 25 mm. 



Distribution. — The species occurred usually in considerable num- 

 bers at the following Albatross stations: D5438: in 297 fathoms (543 

 meters X, bottom temperature 46.2° F. (7.7° C), and D5439,.in 940 

 fathoms (1,719 meters), bottom temperature 36.7° F. (2.6° C), 

 both off the west coast of Luzon; D5447, in 310 fathoms (567 me- 

 ters), bottom temperature 45.3° F. (7.2° C); D5460, in 565 fath- 

 oms (1,074 meters); D5468, in 569 fathoms (1,081 meters); D5469, in 

 500 fathoms (914 meters), and D5470, in 560 fathoms (1,024 meters\ 

 all off the east coast of Luzon; and D5622, in 275 fathoms (503 me- 

 ters), between Gillolo and Makyan Islands. 



This material seems to agree very well with de Folin's description 

 and figure of this species. It is smooth but not polished, hard and 

 not felted as in B. jilijormis. 



Bathysiphon flavidus — Materia I examined. 



B.^THYSIPHON FLAVIDUS de FoSin, var. GIGANTEUS Cushman. 



Plate 2, figs. 4 a, b. 

 Bathysiphon fiavidus de Folin, var. gifjanteus Cushman, Proc. U. S. Nat. Mus., 

 vol. 51, 1917, p. 651. 



Description. — Variety differing from the typical mainly in size, the 

 test being much larger up to nearly 3 mm. in diameter and 40-50 

 mm. in length, the wall smooth and polished instead of dull, as in 

 the smaller, typical form. 



Distribution. — Type specimen (L'.S.N.M. No. 9099) from Albatross 

 station D5609. in 1,092 fathoms (3.131 meters). Gulf of Tomini, Cele- 

 bes, bottom temperature 36.3° F. (2.3° C). Specimens were also 

 obtained from Albatross D5619, in 435 fathoms (796 meters), Molucca 

 Passage; D5622, in 275 fathoms (503 meters), between Gillolo and 



